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A&P Exam 3 > Ch 10 > Flashcards

Ch 10 Flashcards

1
Q

Motor unit

A

Muscle fibers under control of a single motor axon

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2
Q

Tetanus

A

Sustained muscle contraction

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3
Q

Neuromuscular junction

A

Motor neuron transmits the effect of a nerve impulses to the muscle fiber here

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4
Q

Atrophy

A

Decrease in muscular activity or damage to neurons

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5
Q

Istonic contraction

A

Concentric contraction and eccentric contraction

Muscle length may change

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6
Q

Contractility

A

Resisting separation between two bones

Pulling two bones closer together

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7
Q

Elasticity

A

Stretch muscle returning to original length

Resisting desperation of two bones

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8
Q

Slow twitch fibers

A

Main purpose is for support

Many capillaries

Known as red fibers

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9
Q

Resting tension

A

Skeletal muscles do not completely relax at rest

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10
Q

Isometric contraction

A

Muscle tension

No movement of muscle

Ex. Pushing against wall

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11
Q

Isotonic contraction

A

Muscle tension results in movement of muscle

Ex. Lifting

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12
Q

Concentric

A

Shortening of muscle

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13
Q

Eccentric

A

Lengthening of muscle

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14
Q

Sphincters

A

Circular muscle bands contract and relax to regulate passage of materials in and out of stomach

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15
Q

Excitability

A

Excited my stimulus

Neurotransmitter from neuron

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16
Q

Conductivity

A

Allows response to travel throughout cell

17
Q

Fascia

A

Separated individual muscles and binds together muscles with similar functions

Outermost layer

18
Q

Myofibrils made of?

A

Made of myofilaments -proteins

19
Q

What does the sarcoplasmic reticulum store?

A

Calcium

20
Q

Myofilaments

A

Bundled within myofibrils

21
Q

Sarcomeres

A

Overlapping thick and thin myofilaments

22
Q

I-band

A

Shortens during contraction

23
Q

A-band

A

Contains thick and some thin filament

Doesn’t change length during contraction

24
Q

Thin filaments

A

Actin
Troponin
Tropomyosin

25
Q

Thick filaments

A

Myosin

26
Q

Fascia

A

Separated individual muscles and binds together muscles with similar functions

27
Q

Myofibrils made of?

A

Made of myofilaments -proteins

28
Q

What does the sarcoplasmic reticulum store?

A

Calcium

29
Q

Myofilaments

A

Bundled within myofibrils

30
Q

Sarcomeres

A

Overlapping thick and thin myofilaments

31
Q

I-band

A

Shortens during contraction

Thin filaments

32
Q

A-band

A

Contains thick and some thin filament

Doesn’t change length during contraction

33
Q

Thin filaments

A

Actin
Troponin
Tropomyosin

34
Q

Thick filaments

A

Myosin

35
Q

Depolarization

A

Sodium moving in cell

36
Q

Repolarization

A

Potassium moving outside cell

37
Q

Aponeurosis

A

Flattened sheet of dense irregular CT

ex palms, plantar, abdomen, skull

38
Q

Sarcolemma

A

Plasma membrane

39
Q

Z-disc

A

Ends

Thin filaments anchored

A&P Exam 3 (2 decks)

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