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MCAT Basics (from MedSchoolCoach)

The Muscular System

MCAT Basics (from MedSchoolCoach)

MedSchoolCoach

Science

4.6612 Ratings

🗓️ 25 June 2024

⏱️ 35 minutes

🧾️ Download transcript

Summary

This MCAT BAsics episode covers the muscular system. It begins with the differences and similarities between the three types of muscle (smooth, cardiac, and skeletal). Then, the podcast explores the basic structure of a skeletal muscle cell and the various organelles unique to this cell type, including the sarcolemma, sarcoplasm, myofibrils, sarcomeres, and more. Next, it discusses three main differences between Type 1 and Type 2 muscle fibers. Finally, it delves into muscle contraction, starting at the neuromuscular junction and ending with the shortening of sarcomeres, which causes muscle flexion.

 

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[00:00] Introduction

[02:09] Types of muscle - smooth, cardiac, skeletal

[04:49] The structure of a muscle cell in skeletal muscle

[15:11] The difference between Type 1 and Type 2 muscle fibers

[23:08] Understanding how a muscle contracts

[27:53] The Cross-Bridge cycle

Transcript

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0:00.0

Welcome to MCAT Basics, your ultimate guide to the essential topics you need to master for the MCAT,

0:07.0

brought to you by the physicians at Med School Coach.

0:10.0

Every week, Sam Smith breaks down high-yield MCAT topics, ensuring you're primed for success on test day.

0:16.0

Join Sam as we explore the most crucial subjects outlined by the AAMC,

0:23.9

pulled from official practice materials and third-party resources.

0:28.7

Get ready to elevate your MCAT game with topics tailored to maximize your score potential.

0:31.4

Hello, I'm Sam Smith.

0:34.6

I'll talk about a few different topics in this podcast. I'll talk about the different types of muscle.

0:37.1

I'll talk about the structure of a muscle cell, specifically in the case of skeletal muscle.

0:41.8

And I'll talk about the difference between type 1 and type 2 muscle fibers.

0:45.3

And then I'll get into probably the most important part of this podcast, which is

0:49.3

understanding how a muscle contracts and understanding what the cross bridge cycle is. And this material is going

0:55.8

to show up in two out of the four MCAT sections. The first being bio-bio-com and the second being

1:01.6

chemistry physics. Although if you see some kind of muscle-related question in the chemistry physics

1:07.2

section, the odds are it's probably going to be a physics question but this is one of those

1:11.3

topics it's kind of like a medium yield and i think this material can kind of tend to be a bit overlooked

1:16.5

so you know you might not see a bazillion questions about this on the mcat but i think it's worth it

1:22.5

to get you know those several questions that you may see so with that said said, I hope this episode helps in your studies, and good luck.

1:35.4

So as I said, the very first thing I want to talk about here is the different types of muscle

1:40.1

that exist in the human body.

1:41.9

And there's three different types of muscle or three groups of muscle

1:45.7

that are important to know for the MCAT. The first being smooth muscle, the second being skeletal muscle,

...

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