1) Which of the following is/are true for both graded potentials and action potentials? a. Effective for communicating over...

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Biology

1)
Which of the following is/are true for both graded potentialsand action potentials?
a.
Effective for communicating over long distances
b.
Initiated by transmembrane channel proteins
c.
Exhibit relative and absolute refractory periods
d.
both a) and b) are correct, and c) is incorrect
e.
a), b) and c) are all correct
2)
Which of the following statements about Ion channel activityduring the action potential is/are correct?
a.
At the peak of an action potential, Na⁺ channelactivation gates are open, Na⁺ channel inactivationgates are closing, and activation gates for K⁺ channelsare opening.
b.
At resting membrane potential, most voltage-gated Na⁺and K⁺ channels are in the closed configuration.
c.
During repolarization the activation gates of most voltage-gatedK⁺ and Na⁺ channels are open.
d.
both a) and b) are correct, and c) is incorrect
e.
a), b) and c) are all correct

Answer & Explanation Solved by verified expert

4.1 Ratings (815 Votes)

Answer 1 b Initiated by transmembrane channel proteins Explanation a is not correct because graded potentials travel by passive spread and their amplitudes diminishes with distance On the other hand action potentials travel through saltatory conduction and their amplitudes does not diminish See Answer

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	a.	Effective for communicating over long distances
	b.	Initiated by transmembrane channel proteins
	c.	Exhibit relative and absolute refractory periods
	d.	both a) and b) are correct, and c) is incorrect
	e.	a), b) and c) are all correct

	a.	At the peak of an action potential, Na⁺ channelactivation gates are open, Na⁺ channel inactivationgates are closing, and activation gates for K⁺ channelsare opening.
	b.	At resting membrane potential, most voltage-gated Na⁺and K⁺ channels are in the closed configuration.
	c.	During repolarization the activation gates of most voltage-gatedK⁺ and Na⁺ channels are open.
	d.	both a) and b) are correct, and c) is incorrect
	e.	a), b) and c) are all correct