MCAT Basics

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.

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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.

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[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.

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[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.

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[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.

In this episode, we’ll talk about ATP or adenosine triphosphate. We will begin with a detailed examination of ATP's structure and composition as a nucleotide, followed by an explanation of the metabolic pathways involved in its production—both aerobic and anaerobic. We will also cover the pivotal process of ATP hydrolysis, emphasizing its energy release and crucial role in various cellular processes, including the sodium-potassium pump and protein phosphorylation.

Additionally, we will address the limitations of ATP supplementation and the broader implications of ATP in biological transport and biosynthesis processes. This episode promises to provide a clear and thorough understanding of ATP's essential functions, ensuring you are well-prepared for your MCAT studies.

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[00:00] Intro into Adenosine Triphosphate, otherwise known as ATP

[2:09] The structure of ATP

[06:48] Where and how ATP is produced

[24:04] Thermodynamics of ATP

[35:16] The functions of ATP

[35:31] Sodium-potassium pump or the sodium-potassium ATPase

[39:45] Protein kinases and protein phosphorylation

[42:48] ATP binding cassette transporter protein or ABC transporter proteins

This MCAT Basics podcast covers biological membranes. First, the podcast introduces a few topics regarding membranes: what they are, how they are formed, their presence in the cell, and cell-to-cell junctions. Second, it addresses transport through the membrane, including simple diffusion, active vs. passive transport, and transport membrane proteins. Next, the discussion moves to membrane proteins, including receptors, transporters, and the differences between integral, peripheral, and lipid-anchored proteins. Finally, the podcast covers membrane dynamics, such as endocytosis and the transmembrane system, and discusses membrane potential.

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[00:00] Intro into MCAT Basics

[01:08] Introducing Biological Membranes

[01:53] What is a membrane and what is its structure

[15:33] Cell to cell junctions and the involvement of plasma membranes

[17:16] Transport through a membrane

[26:49] Membrane proteins

[31:05] Membrane dynamics and potential

In this episode of MCAT Basics, we’ll cover Electrochemistry. We start with the role of salt bridges in electrochemical cells and cover the intricacies of cell notation. We’ll also discuss how ions maintain charge balance, the importance of reduction and oxidation potentials, and how these elements come together in galvanic and electrolytic cells. We’ll also take a closer look at concentration cells and the critical Nernst equation, which helps us understand cell potentials under non-standard conditions.

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[00:00] Introduction to MCAT Basics

[01:09} Introduction to Electrochemistry

[03:20] Concentration cell: same metal, different ion concentrations

[13:05] Visualizing galvanic cells using royal analogy

[22:19] Reduction potential, oxidation potential, cell potential explained

[30:47] Electrochemical cells, Gibbs free energy, and Nernst equation

[41:16] Electroplating and electric current to coat metals

[45:40] Electrochemistry in Nanobiology: measuring oxidation of molecules

In this episode, we'll break down the intricate processes of nutrient digestion and absorption, from the mechanical and chemical digestion in the stomach to the vital role of the small and large intestines. We'll also discuss the regulatory mechanisms involving hormones and nervous innervation and the essential structures like the liver, gallbladder, and pancreas. And don't forget, this episode is packed with tips on everything you need to know about this high-yield topic for the MCAT.

So grab your notes, get comfortable, and let's embark on this fascinating journey through the digestive system. Stay tuned for a deep dive into how our bodies turn food into the vital nutrients we need to thrive.

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[00:00] Introduction to the MCAT Basics

[05:11] Digestive system involves mechanical and chemical processes.

[06:55] Food travels through digestive system over time.

[10:48] Small intestines: duodenum, jejunum, ileum, enterocytes crucial.

[14:38] Sphincters in digestive system control food movement.

[16:26] Podcast discusses physiology of digestive system structures.

[20:57] Salivary enzyme breaks down starch into glucose.

[23:46] Muscle contractions propel food through digestive system.

[27:40] Lipase enzyme breaks down fats in stomach.

[29:11] Stomach doesn't absorb nutrients, protects itself.

[32:55] Enzymes linked to cells for carbohydrate breakdown.

[38:05] Bile emulsifies fat, chylomicrons enter lymphatic system.

[41:35] Gut bacteria metabolize cellulose, form fatty acids.

[45:02] Living without large intestine; regulation of digestion.

[46:50] CCK stimulates pancreatic juice release, important digestion.

[49:57] Prepare for MCAT and excel with us!

This podcast focuses on the eye. It begins with a brief overview of the eye's anatomy and physiology. The discussion then shifts to rods, cones, and the phototransduction pathway. The final section addresses perception.

Key topics include visual field processing, differences between binocular and monocular cues, and feature detection (covering both Magno and Parvo pathways).

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[00:00] MCAT Tutoring from MedSchoolCoach

[00:34] Welcome to MCAT Basics

[01:06] Topics covered in this episode

[02:10] Anatomy & physiology of the eye

[16:02] Phototransduction pathway

[26:59] Perception

[28:13] Visual field processing

[31:34] Binocular versus monocular queues

[35:02] Visual feature detection - Gestalt principles

[38:18] Parallel Processing

[39:12] Parvo versus Magno pathways

In this episode, we focus on the physiology of sound and hearing.

We begin by exploring sound-related concepts, including sound waves, pitch, ultrasound, and the decibel system. Next, we delve into the anatomy and physiology of the ear, providing a clear understanding of how we perceive sound. This material will appear in two of the four MCAT sections: the Bio/Biochem and Physics/Chemistry sections.

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[00:00] Introduction

[01:50] Physics of sound waves

[06:07] Wavelength and frequency equation

[08:08] Equation for the speed of sound

[11:01] Overall takeaway for the MCAT

[11:15] Ultrasound imaging

[14:23] The decibel system

[18:05] Anatomy and physiology of the ear

Redox reactions or reduction and oxidation are reactions in which electrons are simultaneously transferred from one chemical species to another. This episode begins with exploring this concept, including an in-depth look at oxidizing and reducing agents and the factors determining a compound's effectiveness as an oxidizing agent.

It also covers the oxidation states of molecules and functional groups, common redox reagents in organic chemistry, and the role of redox in biological systems. The episode also addresses numerical concepts from general chemistry related to redox, such as determining oxidation numbers and understanding electrochemical cells.

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[00:00] Introduction

[01:09] What is the conceptual definition of redox

[06:22] What is an oxidizing agent, and what is a reducing agent?

[08:50] What makes a molecule better than another at being an oxidizing agent or a reducing agent?

[13:58] Which oxidation reduction reagents should you know and what do they

[21:44] Redox in biological systems

[35:01] How to determine the oxidation state

[41:16] The application of oxidation-reduction in electrochemical cells

In this episode, we explore the topic of intelligence, which is primarily featured in the psychology and sociology section of the MCAT.

We cover several key theories, including entity vs. incremental theory, general intelligence theory, two-factor theory, multiple intelligences theory, Triarchic theory, CHC theory, and biological theories. Additionally, we examine the nature vs. nurture debate on hereditary intelligence factors and discuss how intelligence is measured.

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[00:00] Intro to Intelligence

[02:47] Entity vs. Incremental Theory

[06:36] G Factor Theory

[10:26] Multiple Intelligences Theory

[12:18] Triarchic Theory

[14:39] CHC Theory

[18:58] Theories of Intelligence

[21:01] Hereditary factors of intelligence

[28:33] How intelligence is measured

[32:06] Why intelligence tests can be problematic

This episode of MCAT Basics covers several separation and purification techniques you may see on the MCAT. We’ll cover these techniques in three distinct categories: small molecules, proteins, and cells.

Within the small molecule category, we’ll discuss extraction, crystallization and recrystallization, and chromatography (TLC and HPLC).

For proteins, we cover SDS-page, precipitation, soelectric focusing, and chromatography variations. Lastly, we’ll explain, within the world of cells, centrifugation, flow cytometry, and microfluidics.

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[00:00] MCAT Tutorig from MedSchoolCoach

[00:34] Welcome to MCAT Basics

[01:07] Topics covered in this episode

[02:24] Techniques for small molecules - extraction, crystallization and recrystallization, and chromatography (TLC and HPLC)

[28:24] Techniques for proteins - SDS-page, precipitation, isoelectric focusing, and chromatography variations

[54:47] Techniques for cells - centrifugation, flow cytometry, and microfluidics.

The immune system is split up into two main categories - the adaptive immune system and the innate immune system.

This episode will cover the intricacies of the innate immune system beginning with an overview of its constituent cells. We will then explore three pivotal elements of the system: anatomical barriers, the general inflammatory response, and the complement system. This will show up in the bio/biochem section of the MCAT.

For additional reading on this topic, you can refer to the NIH’s Innate Immune System paper.

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[00:00] MCAT Tutoring from MedSchoolCoach

[00:34] Welcome to MCAT Basics

[01:06] Topics covered in this episode

[02:09] The goal of the innate immune system

[04:57] The cells that make up the innate immune system

[11:47] Anatomical barriers to the innate immune system

[19:53] General inflammatory response of the innate immune system

[42:49] Complement system

[45:33] MCAT Advice of the day - take as much time as you need to study for the MCAT

To continue our discussion on the immune system, in this episode, we will cover the second type of immune system – the adaptive immune system.

We start with covering some vocabulary that you’ll need to know to understand the immune system, then we move into the cells that make up the adaptive immune system. Then we break down the two branches of the adaptive immune system - humoral immunity including the discussion of B cells and cell-mediated immunity highlighting T cells.

Don’t miss our previous episode on the other type of immune system, the innate immune system.

Visit www.HealthAdmissionsIQ.com for more help with the MCAT.

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[00:00] MCAT Tutoring from MedSchoolCoach

[00:34] Welcome to MCAT Basics

[01:06] Topics covered in this episode

[02:01] Review on the difference between innate vs. adaptive immue system

[02:32] General Vocabulary terms for the adaptive immune system

[07:05] The cells that make up the adaptive immune system

[13:09] The humoral immune system and B cells

[26:07] Cell mediated immunity and T Cells

[34:38] Antigen activation

Understanding the kidneys' role in the body’s balance is essential for the MCAT and beyond.

In this episode, host Sam Smith discusses renal physiology, covering everything from kidney anatomy to the nephron’s critical functions in filtration, reabsorption, secretion, and excretion. You’ll explore the roles of the renal cortex and medulla, learn about the loop of Henle, and uncover the importance of ions, plasma volume, and pH regulation in kidney function. Plus, we’ll examine hormones like ADH and aldosterone and their impact on fluid balance, as well as essential measurements like glomerular filtration rate (GFR) for assessing kidney health.

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(00:00) Intro to renal physiology

(02:43) Kidney anatomy overview

(08:38) Nephron structure and function

(09:50) Six key functions of the kidney

(12:03) Nephron Processes: Filtration

(17:32) Nephron Processes: Reabsorption and secretion

(22:51) The Loop of Henle

(26:05) Understanding osmolarity in the Loop of Henle

(26:55) Ion transport in the ascending limb

(32:04) The role of the collecting duct

(37:18) Hormonal regulation of the nephron

(46:50) Key measurements of renal function

(50:15) MCAT Advice of the Day

Cells and tissues form the building blocks of life, which are crucial for mastering key concepts in the MCAT’s biology and biochemistry sections.

In this episode, host Sam Smith breaks down the differences between prokaryotic and eukaryotic cells, exploring animal, plant, and bacterial cell structures alongside unique cell types like erythrocytes. You’ll gain insights into the various tissue types—epithelial, muscle, connective, and nervous—along with their roles in the body. Plus, Sam highlights essential details on ribosome size, cell reproduction methods, and structural elements like vacuoles and cell walls. This episode equips you with strategies to distinguish cell and tissue types confidently, setting you up for success on exam day.

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(00:00) Intro

(01:03) Cell types overview

(02:44) Prokaryotic vs. eukaryotic cells

(09:53) Animal, plant, and Ffungi cells

(16:20) Bacteria and archaea characteristics

(19:09) Erythrocytes: Structure and function

(20:15) Tissue types intro

(23:35) Epithelial tissue types and functions

(33:17) Connective and nervous tissues

Thermodynamics is fundamental to mastering chemistry concepts and understanding the energy dynamics within biological systems crucial for the MCAT.

In this episode, host Sam Smith dives into the laws of thermodynamics, covering everything from the zeroth law to the third. You'll explore key concepts like enthalpy, entropy, and Gibbs Free Energy and learn how they apply to reaction spontaneity and equilibrium. Sam also gives practical examples, including how the equilibrium constant and reaction quotient (Q vs. K) affect reactions, and covers types of heat transfer—conduction, convection, and radiation—essential for the Chem/Phys section.

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(00:00) Intro

(01:03) Introduction to thermodynamics

(03:58) The four laws of thermodynamics

(12:46) Thermodynamic variables: entropy, enthalpy, and Gibbs Free Energy

(24:11) Phase changes in thermodynamics

(25:30) Gibbs Free Energy and spontaneity of reactions

(38:01) The three types of heat transfer: conduction, convection, and radiation

DNA replication and the central dogma are fundamental concepts in molecular biology, and breaking down the different replication methods and the processes of transcription and translation is crucial for understanding how genetic information is expressed and passed on in cells.

In the first part of our episode, we'll break down DNA replication, exploring the concepts of conservative, semi-conservative, and dispersive replication, unraveling the mechanisms that drive this fundamental process.

Later, we'll focus on transcription and translation, delving into the nuances between prokaryotic and eukaryotic organisms. We'll uncover the mechanisms by which genetic information is transcribed from DNA to RNA and then translated into proteins, all while considering the diverse cellular locations where these processes take place.

Visit www.HealthAdmissionsIQ.com for more help with the MCAT and use promo code PODCAST to receive a five percent discount on your first session.

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[01:07] Episode Overview

[01:54] DNA replication explanation

[05:53] Three phases of replication - initiation, elongation, and termination

[25:12] Central Dogma description

[25:50] Transcription Process

[36:31] The differences between eukaryotic and prokaryotic transcription

[37:58] Translation Process

Understanding social and psychological theories is crucial for success on the MCAT, as these concepts shape everything from human behavior to societal structures.

In this episode, Sam Smith breaks down the essential sociological and psychological theories you need to master, ranging from functionalism and conflict theory to the theories of emotion. Sam explains how these theories apply to real-world scenarios, including their relevance in medicine, healthcare disparities, and patient interactions.

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(00:00) Intro

(01:58) Overview of social and psychological theories

(03:23) Functionalism

(09:55) Conflict theory

(12:52) Symbolic interactions

(15:12) Social constructionism

(18:46) Rational choice and exchange theory

(23:54) Feminist theory

(26:10) Behaviorism

(29:34) Life course theory

(33:45) Theories of emotion

(41:03) Motivational theories