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A&P > Exam 3 > Flashcards

Exam 3 Flashcards

1
Q

Epimysium location

A

exterior of muscle

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2
Q

epimysium function

A

separates muscle from surrounding tissue

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3
Q

perimysium location

A

surrounds fasicles

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4
Q

perimysium function

A

contains blood vessels and nerve supply

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5
Q

endomysium location

A

surrounds individual muscle cells

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6
Q

endomysium function

A

contains capillaries, nerve cells, and stem cells

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7
Q

fascicles

A

bundles of muscle fibers

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8
Q

sarcolemma

A

cell membrane of a muscle fiber

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9
Q

sarcoplasm

A

cytoplasm of muscle fiber

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10
Q

sarcoplasmic reticulum

A

membranous structure surrounding each myofibril

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11
Q

sarcomere

A

contractile units of muscle

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12
Q

motor unit

A

all muscle cells controlled by a single motor neuron

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13
Q

Thin filaments are made of ___

A

actin

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14
Q

Thick filaments are made of ___

A

myosin

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15
Q

I bands contain ____

A

Only thin filaments

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16
Q

I band location

A

End of one A band to the next

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17
Q

A bands contain ___

A

thin and thick filaments

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18
Q

A band location

A

length of thick filament

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19
Q

M line location

A

center of the A band

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20
Q

M line function

A

proteins help stabilize thick filaments

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21
Q

H band location

A

either side of the M line

22
Q

H band contains ___

A

thick filaments only

23
Q

Z line consists of ___

A

protein actinis

24
Q

Z line function

A

interconnect thin filaments of adjacent sarcomeres

25
Q

Titin location

A

extends from thick filaments to Z line

26
Q

Titin function

A

keeps thick and thin filaments aligned, helps restore resting sarcomere length after contraction

27
Q

Myofilament function

A

responsible for muscle contraction

28
Q

sarcoplasmic reticulum function

A

helps transmit action potential to myofibril

29
Q

terminal cisternae

A

SR chambers attached to T tubule

30
Q

Cisternae function

A

concentrate Ca2+ and release Ca2+ into sarcomeres

31
Q

tropomyosin function

A

prevents actin-myosin interaction

32
Q

troponin function

A

binds tropomyosin to G-actin

33
Q

F-actin function

A

binds to myosin

34
Q

F-actin

A

twisted rows of G-actin

35
Q

origin

A

stationary or less moveable attachment

36
Q

insertion

A

moveable attachment

37
Q

agonist

A

produces a particular movement

38
Q

fixator

A

immobilizes origin of an agonist so tension is exerted at the insertion

39
Q

synergist

A

reduces unnecessary movement

40
Q

antagonist

A

opposes or reverses a movement

41
Q

CNS consists of ___

A

spinal cord and brain

42
Q

CNS functions

A

process and coordinate sensory data, motor commands, brain functions

43
Q

PNS consists of ___

A

all neural tissue outside the CNS

44
Q

PNS functions

A

deliver sensory info to CNS

45
Q

Afferent division

46
Q

Efferent division

A

peripheral tissues

47
Q

SNS function

A

controls voluntary and involuntary muscle contractions

48
Q

ANS function

A

controls subconscious actions

49
Q

Sympathetic division function

A

stimulating effect

50
Q

Parasympathetic division function

A

relaxing effect

A&P (17 decks)

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