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AP Unit 8 Quick Recall

Biology

Professional Development

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AP Unit 8 Quick Recall
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16 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What structure divides the skeletal muscle into compartments and contains collagen fibers, elastic fibers, blood vessels, and nerves?

fascicle

endomysium

perimysium

epimysium

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Structures filled with extracellular fluid, formed by the tunneling of the sarcolemma through the muscle fiber, are called

transverse tubules (T tubules).

sarcomeres.

sarcoplasmic reticulum.

myofibrils.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following accurately lists the levels of organization within a muscle from largest to smallest?

muscle fiber, myofilament, myofibril

myofilament, myofibril, muscle fiber

muscle fiber, myofibril, myofilament

Z line, A band, I band, M line

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following parts of a sarcomere connects thick filaments to one another?

M line

Z line

troponin

titin

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If the sarcoplasmic reticulum were to rupture, what immediate effect might this have on the muscle cell?

The cell would be in a state of flaccid paralysis.

A muscle contraction would begin.

The cell could no longer conduct action potentials.

The cell would begin to atrophy.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Both the synaptic cleft and the motor end plate contain which of the following enzymes?

acetylcholine

acetylcholinesterase

nicotinamide reductase

serotonin decarboxylase

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The presence of _________ at the myofilaments begins a contraction.

calcium

acetylcholine

acetylcholinesterase

sodium

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