Ch 9 Lec 2 - Muscles Flashcards

1
Q

in muscle contraction, blank is stored in synaptic vesicles

A

ach

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2
Q

in muscle contraction, impulse reaches end of neuron which releases blank

A

ach

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3
Q

in muscle contraction, ach crosses gap and binds to blank

A

receptors

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4
Q

in muscle contraction, impulse travels through motor blank down t tubules the blank

A

end plates, sarcoplasmic reticulum

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5
Q

in muscle contraction, blank ions diffuse out of the SR into the blank

A

calcium, sarcoplasm

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6
Q

in muscle contraction, calcium exposes the blank

A

active site

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7
Q

in muscle contraction, blank binds to the active site

A

myosin

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8
Q

in muscle contraction, blank is used and contraction occurs

A

atp

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9
Q

in muscle contraction, contraction continues as long as calcium ion blank is high

A

concentration

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10
Q

draw out muscle contraction

A

to help for the exam

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11
Q

during muscle relaxion, ach is decomposed by blank

A

acetlycholinesterase

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12
Q

in muscle relaxion, blank are transported back to sarcoplasmic reticulum

A

calcium ions

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13
Q

in muscle relaxtion, blank and blank links are broken

A

actin, myosin

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14
Q

in muscle relaxtion, blank move back

A

cross bridges

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15
Q

in muscle relaxion, blank is blocked once again

A

active site

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16
Q

the tension produced by a muscle is determined by the blank of stimulation and the number of blank stimulated

A

frequency, motor units

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17
Q

three keys to tension produced

A

all or none, recruitment, tetanus

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18
Q

law that states that all fibers in a motor unity fully contract if stimulated

A

all or none law

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19
Q

steady increase in tension by increasing the number of contracting motor units

A

recruitment

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20
Q

muscle never begins to relax, continuous fused contraction

A

tetanus

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21
Q

motor units contract randomly and there is tension but no movement in this

A

muscle tone

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22
Q

three things that muscle tone can do

A

stabilize joints, hold things in place, maintain posture

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23
Q

constant, exhaustive stimulation increases the number of organelles/proteins in a fiber

A

hypertrophy

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24
Q

overall enlargement of a muscle

A

hypertrophy

25
Q

muscle fibers do not blank

A

reproduce

26
Q

lack of constant motor neuron stimulation reduces organelles and proteins and is reversible if fiber is not dead

A

atrophy

27
Q

atrophy is due to these three things

A

lack of use, hormones, age, nerve damage

28
Q

attachment site that does not move

A

origin

29
Q

attachment site that moves

A

insertion

30
Q

tension =

A

force

31
Q

fascicle arrangement varies based on blank of muscle

A

position

32
Q

fascicles parallel to long blank in parallel muscles

A

axis

33
Q

parallel muscles have this type of force

A

unidirectional

34
Q

two types of parallel muscles

A

fusiform, strap-linear

35
Q

fan shaped muscle with multidirectional force, versatility, and generates the least amount of force

A

convergent muscles

36
Q

example of parallel muscles

A

biceps brachii

37
Q

example of convergent muscle

A

pectoralis major

38
Q

feather shaped muscles that have a tendon passing through the muscle and produce the greatest force

A

pennate

39
Q

example of a pennate muscle

A

deltoid

40
Q

three types of pennate muscles

A

unipennate, bipennate, multipennate

41
Q

concentric fascicles around opening and the contraction decreases lumen diameter

A

circular muscles

42
Q

example of circular muscles

A

orbicularis oculi

43
Q

rotation around one axis

A

uniaxial

44
Q

movement that occurs along 2 axes

A

biaxial

45
Q

movement on all axes

A

multiaxial

46
Q

main muscle causing directional force action

A

agonist

47
Q

muscle action that contracts to oppose agonist

A

antagonist

48
Q

muscle action that assists/modifies movement

A

synergist

49
Q

muscle action that stabilizes elements associated with agonist

A

fixator

50
Q

example of fixator action muscles

A

deltoid stabilizes glenohumeral joint

51
Q

a system that modifies movements and change magnitude of force, speed, direction, distance of limb movement

A

lever

52
Q

stiff arms or arm that can move at a certain point

A

lever

53
Q

four components of a lever system

A

lever, effort, fulcrum, resistance

54
Q

part of lever system that is the skeletal element

A

lever

55
Q

part of lever system that is the applied force

A

effort

56
Q

part of the lever system that is the joint

A

fulcrum

57
Q

part of lever system that is the body part or object moved

A

resistance

58
Q

effort = blank

A

applied force