MCAT Basics (from MedSchoolCoach)

In this episode, we cover the respiratory system, an important topic for the MCAT Bio/Biochem section. We'll go over the anatomy of the respiratory system, highlighting key structures such as the lungs, bronchi, bronchioles, and alveoli, and explain how they contribute to respiratory functions. You'll also learn about the main roles of the respiratory system, including gas exchange, thermoregulation, particle filtration, and maintaining blood pH. We’ll break down the mechanics of breathing, including the role of the diaphragm and intercostal muscles, and how pressure changes drive air into and out of the lungs. We also cover the importance of pulmonary surfactant in preventing alveolar collapse and how partial pressures influence gas movement. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro (01:02) Overview: Functions of the respiratory system (01:28) Main Functions: Gas exchange, thermal regulation, particle filtration, pH control (02:20) Upper Respiratory Tract: Nose, nasal cavity, sinuses, larynx, trachea (05:00) Lower Respiratory Tract: Lungs, bronchi, bronchioles, and alveoli (09:28) Airflow Pathway: How air travels through the respiratory system (10:23) Gas Exchange: Oxygenation and CO2 removal (11:27) Breathing Mechanics: Diaphragm and intercostal muscles (13:04) Pressure Differentials: How pressure changes drive airflow (15:01) Surface Tension in Alveoli: Importance of pulmonary surfactant (18:17) Lung Compliance and Elasticity: How lung tissue stretches and returns to shape (21:48) Gas Exchange Process: Partial pressures of oxygen and carbon dioxide (24:59) Partial Pressure Explained: Role in moving gases during respiration (30:31) Thermoregulation: Maintaining body temperature through respiration (35:59) Particle Filtration: Nasal hairs and mucous cilia system (39:44) pH Regulation: How breathing controls blood pH (41:18) Respiratory Control: Involuntary and voluntary mechanisms, brainstem functions

In this episode, we dive into psychological disorders, a crucial topic for the Psych/Soc section of the MCAT. We’ll start by defining what a psychological disorder is, highlighting key concepts like significant stress and deviant behavior, and discussing how they’re classified using the DSM-5. You'll learn about various categories of disorders, including anxiety disorders, obsessive-compulsive disorders, trauma and stressor-related disorders, and more. We’ll explore the biopsychosocial and biomedical approaches to understanding these conditions, providing insight into the biological, psychological, and social factors that contribute to mental health issues. By the end of this episode, you'll have a comprehensive understanding of the different types of psychological disorders and how they are categorized and treated, helping you tackle related questions on the MCAT. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro: Med School Coach promotion and podcast introduction (01:03) Overview of Psychological Disorders: Episode topics and structure (02:13) Defining Psychological Disorders: Significant stress and deviant behavior (05:29) Biopsychosocial vs. Biomedical Approaches: Holistic vs. traditional perspectives (09:18) DSM-5 Classification of Psychological Disorders: Overview of main categories (10:37) Anxiety Disorders: Fear and anxiety beyond normal levels (16:43) Obsessive-Compulsive Disorder: Obsessions and compulsions explained (18:20) Trauma and Stressor-Related Disorders: PTSD and related disorders (19:19) Somatic Symptom Disorders: Physical symptoms causing mental distress (22:01) Bipolar and Related Disorders: Mood swings and differentiating Bipolar I and II

In this episode, we focus on the lymphatic system, a crucial topic for the Bio/Biochem section of the MCAT. We'll cover the structure of the lymphatic system, including lymphatic vessels, lymph nodes, and major organs such as the bone marrow and thymus. You'll also learn about the system’s primary functions: returning fluid to the blood, supporting the immune system, and absorbing fats and fat-soluble nutrients. Hosts Sam Smith and Alex Starks break down how the lymphatic system plays a vital role in immunity, nutrient absorption, and fluid balance. By the end of this episode, you'll gain a deeper understanding of the lymphatic system's anatomy and physiology, helping you prepare for MCAT-related questions. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro: Med School Coach MCAT Tutoring Promotion (01:01) Episode Introduction: Lymphatic System Overview (01:07) Co-Host Introduction: Sam Smith and Alex Starks (01:19) Episode Outline: Structure and Functions of the Lymphatic System (02:39) Structure of the Lymphatic System: Vessels, Nodes, and Organs (04:06) Lymph: Composition and Role in the Body (04:44) Lymphatic Vessels and Their Role in Transport (06:50) Primary and Secondary Lymphoid Organs: Bone Marrow, Thymus, and Lymph Nodes (09:10) Bone Marrow and B-Cell Maturation (09:45) Thymus and T-Cell Maturation

In this episode, guest host Alex Starks dives into Gas-Phase Concepts for the MCAT. He breaks down the physical properties of gases, explores the ideal gas law, and unpacks the ABCD laws of gases. Alex also covers key conditions that influence molecular collisions in gases and highlights the most important takeaways to help you excel in this section of the exam. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro: Med School Coach promotion and podcast introduction (02:01) Physical properties of gases (06:03) The ideal gas laws (09:40) Conditions that promote molecular collisions in gases (10:34) The ABCD gas law (13:02) The Van der Waals equation (14:33) Gas laws quiz (16:29) Key takeaways  

Aging is an essential topic for the MCAT, and in this episode, we’ll explore it from multiple angles. We start with the biological aspects of aging, including key processes like telomere shortening, cell senescence, and mitochondrial dysfunction—each providing insight into how and why cells age. From there, we dive into how aging impacts the brain, including the types of memory and cognitive functions that either decline or improve with age. Lastly, we’ll cover the sociology of aging, focusing on the life course theory, the social significance of aging, and demographic changes. Expect a comprehensive breakdown of these concepts, with real-world applications and examples to reinforce your understanding. Visit MedSchoolCoach.com for more help with the MCAT.   Jump Into the Conversation: (00:00) Intro (02:30) Cellular markers of aging: Protein aggregation and telomere shortening (04:55) Exploring cell senescence and autophagy dysregulation (07:20) Mitochondrial dysfunction and its role in cellular aging (09:10) Deep dive into telomeres and the Hayflick Limit (12:30) Introduction to aging in the brain (13:45) Memory and cognitive functions that remain stable with age (15:30) Brain functions that improve as we age: Crystallized intelligence and emotional intelligence (17:00) Brain functions that decline with age: Episodic memory and processing speed (19:30) Causes of changes in brain function: Brain size, vasculature, and neurotransmitter levels (22:15) Introduction to the life course theory and its relation to aging (24:45) The social significance of aging in different cultures (26:00) The aging population and its impact on healthcare

In this episode, we break down aromatic compounds, a crucial topic for the Biochem and Chem/Phys sections of the MCAT. You’ll learn what makes a compound aromatic, how to identify them using Huckel’s Rule, and the difference between aromatic, antiaromatic, and nonaromatic compounds. Sam Smith covers key examples like benzene, toluene, and phenol, and explains their role in biological systems like DNA and the electron transport chain. With practical tips and MCAT-focused insights, you'll be ready to tackle questions on aromatic compounds with confidence. Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: (00:00) Introduction and Med School Coach Promotion (01:03) Introduction to the Topic: Aromatic Compounds (02:08) Definition of Aromatic Compounds and Electron Delocalization (04:43) Explanation of Huckel’s Rule and Aromaticity Criteria (07:59) Introduction to Antiaromatic Compounds (09:58) Definition of Polycyclic and Heterocyclic Aromatic Compounds (12:02) Common Aromatic Compounds to Know: Benzene, Toluene, Phenol, Aniline (14:54) Properties of Aromatic Compounds: Physical, Stability, Fluorescence, Basicity (20:15) Aromatic Compounds in Biology: Amino Acids, DNA/RNA, Electron Transport Chain (28:14) Conclusion and Outro  

In this episode, we focus on the structure and role of key social institutions for the MCAT Psych/Soc section. We'll break down the five major institutions—health and medicine, education, family, religion, and government—and explain how each shapes societal norms and individual behavior. You’ll learn about concepts like medicalization, the sick role, and how healthcare is delivered, as well as the hidden curriculum and educational segregation. We’ll also cover family structures, kinship types, and how religion influences social change. Lastly, we’ll touch on political systems and the difference between power and authority, all of which are important for the MCAT. By the end, you’ll be equipped to understand how these institutions impact society and approach related MCAT questions with confidence. Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: (00:00) Intro (01:03) Introduction to Social Institutions (01:54) Definition of Social Institutions (04:24) Formal vs. Informal Institutions (05:03) Health and Medicine: Structure and Function (07:49) Medicalization and the Sick Role (09:56) Delivery of Healthcare (12:18) Illness Experience (13:59) Social Epidemiology (17:05) Education: Structure and Function (19:37) Educational Segregation and Stratification (24:03) Teacher Expectancy (25:06) Family: Structure and Function (28:46) Violence in the Family (29:26) Religion: Structure and Function (32:25) Religion and Social Change (35:43) Government and Economy: Structure and Function (37:11) Power vs. Authority (38:23) Types of Political Systems (41:06) Division of Labor  

In this episode, we focus on DNA mutations and repair, a key topic for the Bio/Biochem section of the MCAT. We'll cover the different types of mutations, including point mutations, insertions, and deletions, and explain how they occur due to replication errors or environmental factors like UV radiation. You'll also learn about the repair mechanisms that fix these genetic changes, such as direct reversal, mismatch repair, and base excision repair. We’ll also discuss how double-strand breaks are addressed through homologous recombination and non-homologous end joining. By the end of this episode, you'll gain a thorough understanding of how mutations happen and the processes the body uses to repair them, helping you prepare for related MCAT questions. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro (01:07) Overview of DNA Mutations and Repair (01:45) What is a Mutation? (02:30) Mutations During DNA Replication (03:29) DNA Polymerase Slippage: Causes duplication of repeated sequences in DNA (06:15) Mutations Before or After Replication: Caused by mutagens like radiation or chemicals (07:19) Mutagens vs. Carcinogens: Differences between agents that cause mutations and those that cause cancer (09:56) Types of Mutations: Overview of point mutations, insertions, and deletions (12:00) Frameshift Mutations: How insertions or deletions shift the reading frame (29:50) Chromosomal Mutations: Inversions and translocations (35:35) DNA Repair Mechanisms: Introduction to replication repair, mutation repair, and break repair (36:51) Proofreading by DNA Polymerase: Repairing replication errors (39:20) Direct Reversal DNA Repair: Enzymes directly fix damaged DNA (40:41) Mismatch Repair: Fixing base mismatches and insertion-deletion loops (43:25) Base Excision Repair: Correcting single-base mutations (46:03) Nucleotide Excision Repair: Fixing bulky DNA damage like pyrimidine dimers (47:56) Interstrand Cross-Link Repair: Repairing DNA strands covalently cross-linked together (50:27) Single-Strand Break Repair: Ligating broken DNA strands back together (51:16) Double-Strand Break Repair: Homologous recombination and non-homologous end joining (54:13) Summary of DNA repair mechanisms

In this episode, we cover the topic of viruses. We explore a comprehensive range of subtopics including the definition and structure of viruses, their life cycles, and the differences between transduction and transfection. We also discuss virus classification, viral mutations, and subviral particles. This material will primarily appear in the Bio/Biochem section of the MCAT.  Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: [00:00] Introduction [01:57] Definition of a virus [02:55] Virus structure [10:41] The viral life cycle [17:34] The bacteriophage life cycle [21:40] The retrovirus life cycle [21:40] The retrovirus life cycle [27:11] Virus classification [32:09] Viral mutation  [40:31] Subviral particles  

The Doppler Effect is a crucial concept for the MCAT, particularly in the Chemistry & Physics section. We'll explore how the Doppler effect occurs when a wave source moves relative to an observer, affecting the observed frequency and wavelength. Using practical examples like an ambulance speeding towards you, we'll bring these concepts to life. We'll also break down the Doppler effect equation, examining what it reveals—and what it doesn’t—about wave behavior. By the end of this episode, you'll have a solid understanding of The Doppler effect and will be ready to tackle any related questions on the MCAT.  Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Introduction to the MCAT Basics (02:09) Conceptual Explanation of the Doppler Effect (03:55) Example: Doppler Effect with an ambulance (04:55) Speed of sound and wave propagation (05:31) Impact of ambulance motion on sound wave speed (06:37) Relationship between wave speed and frequency (07:30) Detailed explanation of sound frequency (08:45) Introduction to the Doppler Effect equation (10:08) Proportionality in the Doppler Effect equation (11:08) Discussion on wavelength and frequency relationship (12:29) Application of the Doppler Effect equation  

In this episode, we cover molecular structure and the key spectroscopy techniques you need to know for the MCAT. We'll explore the intricacies of Nuclear Magnetic Resonance spectroscopy, breaking down the chemical shifts and spin-splitting essentials for understanding hydrogen and carbon bonds in various compounds. You'll learn how to identify functional groups using Infrared (IR) spectroscopy and how mass spectrometry can help determine molecular weights and identify unknown compounds. We'll also touch on UV-Vis spectroscopy and its role in quantifying compounds based on absorption spectra. Visit MedSchoolCoach.com for more help with the MCAT.   (00:00) Intro (01:50) Introduction to absorption spectra and molecular structure (01:52) Absorption spectroscopy and its applications (03:39) IR spectroscopy: Analyzing functional groups with infrared radiation (07:57) Key IR peaks to know for the MCAT (09:52) Visible light and its role in determining compound color (10:57) UV-Vis spectroscopy: Connecting visible and ultraviolet light for compound analysis (14:06) Quantifying compounds using UV-Vis spectroscopy and Beer's Law (16:48) Mass spectrometry: Determining molecular weight and identifying compounds (22:18) Interpreting mass spectrometry graphs and calculating molecular weight (26:44) NMR spectroscopy: Understanding molecular structure through proton shifts (31:23) Key NMR shifts to know for the MCAT (33:21) Spin splitting in NMR and the n+1 rule  

In this episode, we focus on personality and the theories relevant for the MCAT.  We’ll cover key perspectives, such as psychoanalytic theory, humanistic theory, and trait theory, along with the influence of social cognitive and biological factors on personality development. You’ll get an overview of the different personality disorders, categorized into clusters like odd or eccentric behavior, dramatic or erratic behavior, and anxious or fearful behavior. You’ll also gain an understanding of specific disorders, including narcissistic personality disorder, antisocial personality disorder, and obsessive-compulsive personality disorder. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: (00:00) Intro (01:01) Introduction to Personality (01:41) Defining Personality (03:27) Overview of Personality Theories (06:11) Psychoanalytic Theory: Id, Ego, and Superego (09:03) Humanistic Theory: Achieving Individual Potential (10:16) Trait Theory: Stable Traits Over Time (11:06) Five-Factor Model of Personality (12:08) Social Cognitive Theory: Learning and Cognition (13:18) Biological Theory: Genetic Influences on Personality (15:10) Behaviorist Theory: Environmental Shaping of Personality (16:39) Introduction to Personality Disorders (19:19) Cluster A: Odd or Eccentric Behavior Disorders (22:26) Cluster B: Dramatic, Emotional, or Erratic Behavior Disorders (26:13) Cluster C: Anxious or Fearful Behavior Disorders (28:24) OCD vs. OCPD: Key Differences (29:40) Overlap Between Personality Disorder Clusters

In this episode, we discuss population genetics and see how genetically related individuals share the same alleles, delving into the mechanisms of gene flow and genetic drift. We'll also unravel the complexities of hybrid vigor, reproductive isolation, and natural selection, and how these processes shape the genetic landscape of populations.    We'll also touch on the fascinating dynamics of X-linked and mitochondrial inheritance, and the role of genomic imprinting in disease risk. Ever wondered how the Hardy-Weinberg equation helps us understand genetic equilibrium in populations? We've got that covered too, breaking down the assumptions and applications of this essential model. Plus, we'll delve into how allele frequencies can shift due to factors like mutations and population bottlenecks.   Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: [00:00] Introduction to the MCAT Basics [01:06] Overview of Population Genetics [01:55] Definition of Population Genetics [03:01] Genotype vs. Phenotype [03:38] Example of BRCA1 Gene [07:33] Autosomal Dominant and Recessive Inheritance Patterns [08:40] X-Linked Inheritance Patterns [09:38] Mitochondrial Inheritance [10:46] Genomic Imprinting [12:46] Complex and Multifactorial Inheritance [13:52] Introduction to Hardy Weinberg Equation [14:33] Assumptions of Hardy Weinberg Equation [15:16] Historical Context of Hardy Weinberg Equation [17:02] Calculation of Allele Frequencies [19:18] Example Problem Using Hardy Weinberg Equation [23:17] Limitations of Hardy Weinberg Equation [24:07] Ways Populations Change Over Time [24:58] Natural Selection [27:10] Fecundity and Fertility in Natural Selection [28:07] Types of Natural Selection [30:00] Mutation [32:17] Example of Mutation in HIV Research [34:29] Genetic Drift [38:11] Gene Flow and Gene Leakage [40:12] Hybrid Vigor and Reproductive Isolation [42:16]  Prepare for MCAT success with MedSchoolCoach.

Social norms and deviance as covered in the MCAT is a fascinating topic, and in this episode, we'll break down the intersection of social norms—folkways, mores, taboos, and laws—how they play a crucial role in shaping societal values, and what happens when these norms break down, a concept known as anomy. Plus, we'll delve into collective behavior phenomena such as fads, mass hysteria, moral panic, and riots, touching on some real-life examples and historical comparisons.   Expect a comprehensive overview, with real-world relevance and plenty of examples to help solidify your understanding.    Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: [00:00] Introduction to the MCAT Basics [04:57] Breaking social norms is not a big deal. [09:00] Jeffrey Dahmer was a serial killer. [12:41] Breaking social norms, deviance explained in theories. [14:03] Biking under influence leads to deviant identity. [19:02] Weak community ties breed crime, social disorganization theory. [20:20] Cultural deviance theory explains lower class deviance. [23:39] Social control theory emphasizes individual responsibility for deviance. [26:58] Orson Welles's 1938 radio drama causes hysteria.  

In this episode, we’ll nail down all that is needed for the MCATB in relation to fat and protein metabolism. Two critical processes for gaining energy and maintaining cellular functions in the body. We'll learn about the intricate details of beta-oxidation, where fatty acids are broken down in the mitochondrial matrix to produce energy-rich molecules like NADH, FADH2, and acetyl CoA. From protein catabolism, where proteins are broken down into amino acids that feed into gluconeogenesis and ketosis pathways, to protein anabolism, where these amino acids are incorporated into new proteins. You'll get insights into the role of amino acids in synthesizing other compounds like serotonin and nucleotides. Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: 00:00 Introduction to MCAT Basics 01:25 Fat metabolism 02:00 Fat absorption 06:45 Breakdown of fats 08:30 Lipolysis 10:15 Transport of fatty acids 11:20 Beta oxidation pathway 13:40 Energy yield from beta-oxidation 16:00 Odd-chain and unsaturated fatty acids in beta-oxidation 20:00 Differences in energy production and pathways. 22:29 Fatty acid synthesis 25:15 Ketone body formation and usage 28:00 Protein breakdown (catabolism) 31:45 Glucogenic and ketogenic amino acids 35:00 Protein synthesis (anabolism)  

In this episode, we cover the topic of work and energy. We’ll start off by talking about work, which includes the mathematical and conceptual definitions and the sign convention of work. We’ll also talk a little bit about mechanical advantage and also path dependency. Moving on to energy, we’ll talk about the general definition of energy, we’ll compare and contrast energy in work and the different types of energy that includes kinetic energy, potential energy, thermal energy, and total mechanical energy. Lastly, we’ll talk about energy transfer, specifically heat transfer, and the three types of convection, conduction, and radiation. Visit MedSchoolCoach.com for more help with the MCAT.   Jump Into the Conversation: 00:00 Introduction 05:27 Summary: Limits of equation for work and force 08:39 Positive work: force and displacement in same direction 09:32 Comparison of mechanical and thermodynamic work sign conventions 12:50 Work changes kinetic energy of moving objects 16:32 Friction and energy 22:25 Pitching 27:10 Kinetic and potential energy relation  32:14 Sun and heat transfer  

In this episode, we’ll cover crucial aspects such as hormones, their origins and mechanisms of action, and the various structures within the endocrine system. We'll also decode complex cell-to-cell communication and distinguish between different hormone types—peptide, protein, steroid, and lipid-derived.   Furthermore, we'll explore key endocrine disorders like diabetes and hyper- and hypogonadism, discussing their causes, symptoms, and relevance to the MCAT. In addition, we'll touch upon the functions and hormones of several glands, including the pituitary, thyroid, adrenal glands, and pancreas.   Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: 00:00 Introduction to the MCAT Basics Podcast with host, Sam Smith 03:34 Exosomes act as information carriers for cells. 09:00 Large, charged substances dissolve in blood easily. 10:30 Protein kinase A activates multiple molecules quickly. 15:57 Podcast discusses prostaglandin, thromboxins, leukotrienes and glands. 18:22 Hormones explained: flat peg and pineal gland. 23:15 Endocrine diseases: hyperthyroidism, hypothyroidism, hyperinhypogonadism, diabetes. 26:33 Autoimmune disorder characterized by overactive thyroid production. 29:28 Hypothalamus role in hormone production and disorders. 34:01 Type 1 diabetes: Genetic and environmental factors. 35:47 Diagnosis and causes of type two diabetes. 39:18 Med School Coach elevates your application level.  

This episode is packed with essential high-yield information for your MCAT prep, covering the biological, physiological, and psychological aspects of sleep. We’ll explore various sleep theories, like the Memory Consolidation and Brain Plasicticity Theories, and even discuss the controversial “Sleeping When You Die” theory. We’ll also delve into dream theories, including Freud’s interpretations and the Activation Synthesys Hypothesis. Plus, we’ll address common sleep disorders such as insomnia, sleep apnea, and narcolepsy, alongside the effects of different drugs on your sleep patterns.    We’ll cover critical brain structures involved in sleep, such as the hypothalamus and the suprachiasmatic nucleus, and break down the stages of sleep measured through EEG, EMG, and EOG.    Visit MedSchoolCoach.com for more help with the MCAT.   [00:00] Introduction to the MCAT Basics podcast with host, Sam Smith [04:05] Pineal gland, amygdala, basal forebrain in sleep. [07:40] Measuring postsynaptic potential, not action potentials. EEG waves distinguish sleep stages. EMG records muscle electrical activity. [10:46] Alpha waves awake, theta waves asleep. Hallucinations in stage N1 sleep. [15:01] Unconfirmed sleepwalking. Stages of sleep explained. [18:18] Sleep cycles lengthen REM stage, diagrams illustrate. [19:50] We don't remember all our dreams. [23:55] Shifting circadian rhythms due to changes in light. [29:10] Blind people's melatonin release entrained with light. [29:41] Cortisol secretion cycle follows a circadian rhythm. [35:09] Freud: Dreams represent unconscious desires; manifest vs latent. [38:53] Divorce dreams related to spouse thinking time. Broad sleep disorder categories: insomnia, breathing, hypersomnolence. [41:18] Hypersomnia, narcolepsy, drugs' impact on sleep. [44:14 Brief primer on drug effects on sleep.  

In this episode, we're covering the anatomy and physiology of key organs such as the kidneys, liver, skin, lungs, and large intestine, and discuss the crucial role they play in eliminating waste products from our bodies. From the structure of the hepatic lobules in the liver to the sweat glands in our skin and the alveoli in our lungs, we'll cover how each component functions to maintain homeostasis. We'll also delve into the metabolic breakdown processes and the excretion of waste molecules such as urea, electrolytes, and gases like carbon dioxide.  Visit MedSchoolCoach.com for more help with the MCAT.   Jump into the conversation: [00:00] Introduction to the MCAT Basics Podcast with host, Sam Smith [04:50] Kidney, adrenal glands, nephrons filter blood. Bladder stores waste connected to kidneys. [09:57] Liver has lobes and functional hepatic lobules. Skin excretes through sweating. [12:20] Lung anatomy: trachea, bronchi, alveoli, gas exchange. [16:54] Urea cycle energy requirement, deamination of amino acids. [20:35] Urea density calculates volume of small ice cube. [24:15] Carbon dioxide is a metabolic byproduct. [27:46] Liver metabolizes drugs into water-soluble compounds.

In this episode, we'll explore three crucial hormone axes: the hypothalamic-pituitary-adrenal (HPA) axis, the hypothalamic-pituitary-gonadal (HPG) axis, and the renin-angiotensin-aldosterone (RAAS) system. We'll decode the complex interplays among the hypothalamus, pituitary gland, and various peripheral organs, focusing on how these hormone systems regulate everything from stress responses and reproductive functions to blood pressure and fluid balance. We'll break down the HPA axis and its pivotal role in stress response, featuring hormones like corticotropin-releasing hormone (CRH) and cortisol. Next, we’ll navigate through the HPG axis to understand the hormonal orchestration behind testosterone, estrogen, and progesterone production. Lastly, we’ll zero in on the RAAS system, demystifying its essential function in blood pressure regulation and electrolyte balance. Visit MedSchoolCoach.com for more help with the MCAT.  Jump into the conversation: [00:00] Introduction to the MCAT Basics Podcast with host, Sam Smith [03:11] Hypothalamus: brain section, regulates hormones, monkey bread. [08:57] Hypothalamus releases hormones to stimulate pituitary gland. [12:12] Cortisol is a crucial stress response hormone. [13:12] Steroid hormones need carrier proteins for transport. [17:05] Hypothalamic pituitary gonadal axis involves important structures. [21:01] Hypothalamus releases gonadotropin hormone for sex development. [27:14] Sex hormones regulate important body functions through feedback. [28:31] Juxtaglomerial cells respond to changes in blood pressure. [33:20] Angiotensin III and IV stimulate aldosterone release. [35:36] Renin angiotensin system increases sodium, blood pressure.