After you've watched the animation, click the button below to answer questions about what you've learned.
Animation Assessment
90
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After you've watched the animation, click the button below to answer questions about what you've learned.
Animation Assessment
Question 1 of 8
Questions
Question
The type of signaling cascade shown in the video directly affects which of these animal tissue types?
A.
B.
C.
D.
2
Correct.
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Incorrect.
Question
Adrenaline stimulates an increase in heart rate by binding to:
A.
B.
C.
D.
E.
2
Correct.
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Incorrect.
Question
True or False: A single molecule of activated G-protein is capable of activating multiple adenylyl cyclase enzymes.
A.
B.
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Incorrect.
Question
The alpha subunit of a G-protein is free to diffuse in the plane of the membrane when:
A.
B.
C.
D.
E.
2
Correct.
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Incorrect.
Question
Termination of the adrenaline signal begins when:
A.
B.
C.
D.
E.
2
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Incorrect.
Question
Arrange the events in the stimulation of heart muscle in order from earliest (1) to latest (5). Note that this question does not list every step in the pathway, but the steps presented should be arranged in order.
Activation of adenylyl cyclase
Activation of G-proteins
Activation of protein kinase A
Phosphorylation of proteins that induce contraction in muscle cells
Conversion of ATP into cyclic AMP
2
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Incorrect.
Question
Which of the following could lead to a prolonged increase in heart rate, even in the absence of an external signal? Choose all that apply.
a. An inability of a G-protein to hydrolyze GTP
b. An inability to inactivate protein kinase A
c. An inability of G-protein coupled receptors to bind adrenaline
d. An inability of cyclic AMP to activate protein kinase A
e. An inability to convert ATP into cyclic AMP
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Correct.
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Question
The primary advantage of a signaling cascade is that it:
A.
B.
C.
D.
E.
2
Correct.
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