The Muscular System

MCAT Basics (from MedSchoolCoach)

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6M ago 35:55

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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

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