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Bios 252 Exam 1 Questions with Verified Correct Answers

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Bios 252 Exam 1 Questions with Verified Correct Answers

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Bios 252 Exam 1 Questions with Verified
Correct Answers
Characteristics of cardiac and smooth muscle

Involuntary

Cardiac muscle characteristics

Striations

Uninuclear

Branching cells

intercalated disc

Involuntary

Found only in the walls of the heart

Smooth muscle characteristics

no striations

spindle-shaped cells

single nucleus

involuntary

found in walls of hollow organs

Sarcolemma

plasma membrane of a muscle cell

Epimysium

surrounds entire muscle (entire)

Elasticity

, ability to recoil to resting length

contractibility

ability to shorten

Extensibility

ability to be stretched

Perimysium

surrounds fascicles(parts)

Endomysium

Surrounds individual muscle fibers (every)

ATP function in muscle contraction

Breaks myosin from actin cross bridge

Transmitter @ nmt

Acetylcholine

Depolarization

Na+ entering cell causing inside to become more positive

aerobic respiration

Provides minutes to hours of ATP

creatine phosphate

Immediate energy source

isometric contraction

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