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4.2: Keywords

Last updated

May 20, 2024
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- 4.1: Muscle
- 4.3: Overview

Ryan Jennings and Christopher Premanandan
Ohio State University

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Please familiarize yourself with these keywords before you start reading the chapter:

Cardiac muscle: A type of striated muscle found specifically in the heart or myocardium.
Intercalated disc: A structure specific to cardiac muscle formed from gap junctions and desmosomes that allow cardiac muscle cells to contract in a coordinated fashion.
Myofibers: The term for a muscle cell. Applies to skeletal muscle, cardiac muscle and smooth muscle.
Myofibrils: The tube like organelle present in skeletal muscle and cardiac muscle that coordinates contraction of the cell.
Purkinje fibers: Modified cardiomyocytes that propagate electrical signals through the cardiac muscle of the myocardium allowing coordinated contraction.
Sarcomere: The basic functional unit of striated muscle that is composed of myofilaments.
Sarcoplasmic reticulum: The organelle that is responsible for the storage and release of calcium into the cytosol of the myofiber.
Skeletal muscle: A type of striated muscle responsible for voluntary movement.
Smooth muscle: Non-striated muscle that is responsible for involuntary movement within several organ systems.
T tubules: Invaginations of the sarcolemma (cell membrane) into the cell that allows for the conduction of depolarization impulses from the outside of the cell to around the sarcomeres.

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