BIO201L LAB_V3
Lab 7 The Muscular System
Started on Wednesday, August 31, 2022, 6:27 AM
State Finished
Completed on Wednesday, August 31,
... [Show More] 2022, 6:36 AM
Time taken 9 mins 17 secs
Grade 35.00 out of 35.00 (100%)
Question 1
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Prime movers are the muscles that stabilize joints.
Select one:
a. True
b. False
Question 2
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A sarcomere is:
Select one:
a. The contractile unit of a muscle.
b. Striations of a muscle.
c. A unit of myofilament.
d. The nonfunctional segment of skeletal muscle.
Question 3
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Which muscle type is striated?
Select one:
a. Skeletal
b. Smooth
c. Both skeletal and smooth
d. neither skeletal nor smooth
Question 4
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The criteria for naming muscles include:
Select one:
a. Muscle Location
b. Number of Originsc. Fascicle Direction
d. All of the above.
Question 5
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What is the most common muscle type in the human body?
Select one:
a. Cardiac
b. Skeletal
c. Smooth
d. All muscle types are evenly distributed throughout the body.
Question 6
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The Z-line is:
Select one:
a. A protein disk that bisects and anchors the I-band.
b. The area between filaments.
c. A bundle of myofilaments.
d. Extensions of the sarcolemma.
Question 7
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Which of the following is NOT true regarding motor neurons?
Select one:
a. Motor neurons are neurons that simulate muscles.
b. The motor neurons and muscles that form the neuromuscular junction controls
involuntary action.
c. A motor unit includes one motor neuron and all of the muscle fibers it innervates.
d. The axon of a motor neuron has several terminal branches that form a neuromuscular
junction with one muscle fiber.
Question 8
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What is the functional purpose of calcium (Ca2+) in muscle contraction?
Select one:
a. To cause a positional change in troponin.
b. To cause a positional change in actin.
c. To cause a positional change in tropomyosin.
d. To cause a positional change in myosin.
Question 9
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The contractile unit of the muscle fiber is the sarcoplasmic reticulum.
Select one:
a. True
b. False
Question 10
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Muscle cells are also called myocytes or muscle fibers.
Select one:
a. True
b. False [Show Less]