Biology · Human Anatomy and Physiology
On the basis of the mechanism of action potential generation in pacemaker tissue (SA/AV node) of the mammalian heart, consider the following statements: A. 'funny' (I f ) channels are activated at hyperpolarized membrane potentials (phase 'b') B. Outward flow of K + occurs during repolarization (phase 'a') C. T-type Ca 2+ channels are closed during the peak of action potential (phase 'c') D. Fast Na + channels are opened during depolarization (phase 'd') E. The upward phase of depolarization (phase 'd') is largely due to inward movement of Na + Which one of the following combinations represents the correct statements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A and B✓
- 2B and C
- 3C and D
- 4D and E
Correct answer
A and B
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