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Physiology Unit 1 > Chapter 1 Structure And Function Of Exercising Muscle > Flashcards

Chapter 1 Structure And Function Of Exercising Muscle Flashcards

1
Q

Smooth muscles

A

Involuntary muscle blood vessels and organs

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2
Q

Cardiac muscle

A

Controlled by the autonomic nervous system located only in heart

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3
Q

Skeletal muscles

A

Voluntary muscle 600 in body

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4
Q

How many muscles in the body ?

A

600+

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5
Q

Tendons

A

Connects muscle to bone (detects force)

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6
Q

Ligament

A

Connects bone to bone (stability of joint)

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7
Q

Epimysium (facia)

A

Outer connecting sheet surrounding muscle

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8
Q

Muscle fiber

A

Individual muscle cells

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9
Q

Myofibril

A

Contractile element of the skeletal muscle (rod like structure running length of muscle)

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10
Q

Sarcoplasm

A

Gelatin like substance that fills in space around muscle

Glycogen and myoglobin stored inside

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11
Q

Glycogen

A

Stored form of carbs

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12
Q

Myoglobin

A

Oxidative enzymes (endurance athlete)

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13
Q

Transverse tubule TTube

A

Electrical stimulus for action potential (way for electricity to get in)

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14
Q

Sarcoplasimreticulum (sr)

A

Longitudinal network of tubes running length of muscle (contains calcium ions)

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15
Q

Zlines

A

Are at the end of the sarcomere

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16
Q

I bands

A

Region of sarcomere where there are onlyThin filaments

17
Q

A band

A

Region of sarcomere with thick and thin filaments

18
Q

H zone

A

Directly in middle of sarcomere shortens and lengthens depending on contraction

19
Q

M line

A

Stabilizing structure of sarcomere and attachment sight of thick filament

20
Q

Sarcomere

A

Run end to end in muscle like an accordion

21
Q

Myosin (protein)

A

Thick filament makes up 2/3 of skeletal muscle protein 2 protein strands twisted together
1 strand called myosinglobular head

22
Q

Actin (protein)

A

Thin filament made up of 3 protein molecules actin troponin tropomyosin

23
Q

Sliding filament theory

A

Muscle contraction

24
Q

Alpha motor neurons

A

Stimulating muscles
Dendrites receive signal
Muscles cannot contract unless they are connected to alpha motor
Responsible for delivering the action potential

25
Q

Events leading to muscle fiber contraction

A 
Action potential 
Axon terminal 
Synaptic vesicles (ach released)
Crosses neuromuscular junction 
Takes off and looks for t tubes
Sarcolema 
Stimulates sarcoplasmic reticulum
Releases calcium in muscle

Physiology Unit 1 (5 decks)

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