Muscle Types & Functional Characteristics

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6 Terms

1
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Name the three muscle types and one key function for each.

Skeletal: voluntary movement and posture; Cardiac: pump blood; Smooth: move substances in hollow organs.

2
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List the four functional characteristics of muscle.

Excitability, Contractility, Extensibility, Elasticity.

3
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Give two general functions of muscle tissue.

Movement (body parts, substances) and maintenance of posture; also heat production and joint stabilization.

4
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What determines fast vs slow twitch fibers?

Myosin ATPase isoform, rate of cross-bridge cycling, mitochondrial content, and metabolic pathways.

5
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What is muscle tone?

Low-level, involuntary motor unit activity that maintains posture and readiness.

6
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