lOMoARcPSD|14985576
7C Midterm 1
Review
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Refer to the following diagram to help you answer questions [1-3]
1. SR pathway activation causes SR genes to be expressed
a. True
b. False
2. The addition of a drug that increases the binding a nity of transducer 1 to
transducer 2 results in the signaling pathway always being activated even in the
absence of a signaling molecule
a. True
b. False
3. A stem cell prematurely stops expressing the DIV and ID genes. Which of the
following could overcome this inhibition of differentiation?
a. A loss-of-function mutation in the neural pathway transducer 2
b. A gain-of-function mutation causing dimerization and autophosphorylation
of neural pathway receptor in the absence of the neural signal
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c. A gain-of-function mutation causing dimerization and autophosphorylation
of the SR pathway receptor in the absence of the SR signal
d. A gain-of-function mutation in a phosphatase that targets the skin pathway
transducer 1
Examine the graph of an action potential. This represents the stimulation at the axon
hillock of an afferent neuron. Use the diagram below to answer questions [4-8]
4. The net movement of sodium ions across the cell membrane at point 6 is _____ at
point 4.
a. The same as
b. Lower than
c. Higher than
5. The number of open voltage-gated potassium channels at point 8 is _____ at point 7.
a. Higher than
b. The same as
c. Lower than
Downloaded by Clare Kemmy ()
7C Midterm 1
Review
, lOMoARcPSD|14985576
Refer to the following diagram to help you answer questions [1-3]
1. SR pathway activation causes SR genes to be expressed
a. True
b. False
2. The addition of a drug that increases the binding a nity of transducer 1 to
transducer 2 results in the signaling pathway always being activated even in the
absence of a signaling molecule
a. True
b. False
3. A stem cell prematurely stops expressing the DIV and ID genes. Which of the
following could overcome this inhibition of differentiation?
a. A loss-of-function mutation in the neural pathway transducer 2
b. A gain-of-function mutation causing dimerization and autophosphorylation
of neural pathway receptor in the absence of the neural signal
Downloaded by Clare Kemmy ()
, lOMoARcPSD|14985576
c. A gain-of-function mutation causing dimerization and autophosphorylation
of the SR pathway receptor in the absence of the SR signal
d. A gain-of-function mutation in a phosphatase that targets the skin pathway
transducer 1
Examine the graph of an action potential. This represents the stimulation at the axon
hillock of an afferent neuron. Use the diagram below to answer questions [4-8]
4. The net movement of sodium ions across the cell membrane at point 6 is _____ at
point 4.
a. The same as
b. Lower than
c. Higher than
5. The number of open voltage-gated potassium channels at point 8 is _____ at point 7.
a. Higher than
b. The same as
c. Lower than
Downloaded by Clare Kemmy ()
