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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.
List the four functional characteristics of muscle.
Excitability, Contractility, Extensibility, Elasticity.
Give two general functions of muscle tissue.
Movement (body parts, substances) and maintenance of posture; also heat production and joint stabilization.
What determines fast vs slow twitch fibers?
Myosin ATPase isoform, rate of cross-bridge cycling, mitochondrial content, and metabolic pathways.
What is muscle tone?
Low-level, involuntary motor unit activity that maintains posture and readiness.