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A&P lecture > lecture test 3 muscles > Flashcards

lecture test 3 muscles Flashcards

1
Q

What proteins make up thin filaments?

A

Actin,tropomyosin,troponin

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2
Q

Which proteins make up thick filaments?

A

myosin

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3
Q

What is the sarcolema?

A

Cell Membrane

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4
Q

What causes reddish color of urine?

A

myoglobin

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5
Q

What is the function of Myoglobin?

A

stores O2

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6
Q

Is ATP needed for muscle cell contractions or relaxation?

A

It is needed for both

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7
Q

ATP binds to which protein filament actin or myosin?

A

Myosin

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8
Q

Energy from ATP is needed for which step of the sliding filament theory?

A

Power-stroke

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9
Q

What is a sarcomere?

A

Functional unit of muscle cells

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10
Q

Name two ways ATP is used for muscle cell relaxation?

A

Bind to Myosin the head of cross. Bridge detachment

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11
Q

When resting does chris’s muscle cells use glucose to synthsize ATP during this type of metabolism?

A

Fatty acids which break down from lipids

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12
Q

During strenuous activity does chris’s muscle cells use glucose to synthesize ATP aerobically or anerobically?

A

anaerobically

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13
Q

How does this type of metabolism affect latic acids levels ( if O2 is not available) Increase or decrease?

A

Increase

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14
Q

can other nutrients besides glucose be broken down to produce ATP?

A

No only glucose

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15
Q

Did chris’s forearm muscles rely on aerobic or anaerobioc metaboslim?

A

anaerobic

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16
Q

When having a blood pressure on where would the muscle cells in chris’s forearm get glucose

A

stored glycogen

17
Q

Where chris’s latic acid levels high or low?

A

Low

18
Q

Which enzyme are chris’s muscles lacking?

A

glycogen phosphate

19
Q

What is the function of Glycogen phosphate?

A

breaking down glucose

20
Q

How would a lack of this enzyme affect ATP production?

A

Not enough gluose to produce ATP anaerobically

21
Q

Is the muscle used for toe-walking primarily composed of fast-twitch or slow-twitch fibers?

A

fast twitch

22
Q

Do the muscle fibers rely on aerobic or anaerobic metabolism?

A

Anaerobic

A&P lecture (2 decks)

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