Smooth Muscle Flashcards

1
Q

What is the capacity of muscle to respond to a stimulus?

A

excitability

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2
Q

What is the ability of a muscle to shorten and generate pulling force?

A

contractility

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3
Q

What is the ability of a muscle to be stretched back to its original length?

A

extensibility

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4
Q

What is the ability of a muscle to recoil to original resting length after stretched?

A

elasticity

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5
Q

What type of muscle is found in the walls of hollow organs and tubes?

A

smooth

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6
Q

Does smooth muscle have striations?

A

nope

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7
Q

Do smooth muscle filaments form myofibrils?

A

Nah

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8
Q

Are smooth muscles arranged in sarcomere pattern like skeletal muscle?

A

No

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9
Q

How is smooth muscle shaped?

A

spindle-shaped

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10
Q

True or False? Smooth muscle has dense bodies containing the same protein found in Z lines.

A

True

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11
Q

What is the dense regular connective tissue surrounding entire muscle?

A

epimysium

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12
Q

What are collagen and elastic fibers surrounding a group of muscle fibers called a fascicle?

A

perimysium

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13
Q

What are loose connective tissue that surround individual muscle fibers?

A

endomysium

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14
Q

True or False? Collagen fibers of epimysium, perimysium, and endomysium come together at each end of muscle to form a tendon or aponeurosis.

A

true

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15
Q

_____ is nonstriated and does involuntary, slow, wave-like contractions.

A

Smooth muscle

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16
Q

Fibers in smooth are _____ than those in skeletal muscle.

A

smaller

17
Q

True or False? Smooth muscle has more myosin than actin.

A

False. Smooth muscle has more actin than myosin.

18
Q

What are indentations in sarcolemma?

A

caveolae

19
Q

What are the two layers of sheets of smooth muscle?

A

longitudinal layer

circular layer

20
Q

Smooth muscle is innervation by what system?

A

ANS

21
Q

Impulses spread through gap junctions in what type of smooth muscle?

A

visceral or unitary smooth muscle

22
Q

Which type of smooth muscle is often autorhythmic?

A

visceral or unitary smooth muscle