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• BIO201L LAB ONLY_V2
• Lab 7 The Muscular System
Started on Thursday, March 31, 2022, 7:22 PM
State Finished
Completed on Thursday,
... [Show More] March 31, 2022, 7:28 PM
Time taken 6 mins 31 secs
Grade 35.00 out of 35.00 (100%)
Question 1
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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 2
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The positional change in tropomyosin exposes myosin binding sites on what protein?
Select one:
a. Troponin
b. Myosin Head
c. Adenosine Triphosphate
d. Actin
Question 3
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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 4
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What is the difference between an origin and an insertion?
Select one:
a. Origins occur where a muscle meets the stable bone, and insertions occur where a muscle meets the mobile bone.
b. Origins occur where a muscle meets the mobile bone, and insertions occur where a muscle meets the stable bone.
c. Origins occur where a muscle begins to grow, and insertions occur where muscle growth ceases.
d. Origins occur where muscle growth ceases, and insertions occur where a muscle begins to grow.
Question 5
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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 6
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How do skeletal muscle generate different levels of force?
Select one:
a. Action Potentials
b. Force Summation
c. Twitch Contractions
d. Excitation-Contraction Coupling
Question 7
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A triad is composed of:
Select one:
a. Three t-tubules.
b. Three terminal cisternae.
c. Two terminal cisternae and one t-tubule.
d. One terminal cisternae and two t-tubules.
Question 8
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The three major types of skeletal muscle are cardiac, skeletal, and digestive.
Select one:
a. True
b. False
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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What structural units perform muscle fiber contractions?
Select one:
a. Actin
b. Myofibrils
c. Myofilaments
d. Sarcomeres [Show Less]