When two or more graded potentials arrive at the trigger zone, which of the following could happen?
A) An excitatory and inhibitory signal can cancel each other out and two excitatory stimuli may be additive, and summation could occur.
B) Two inhibitory stimuli may be additive, resulting in lower excitability.
C) An excitatory and inhibitory signal can cancel each other out; two excitatory stimuli may be additive, and summation could occur; and two inhibitory stimuli may be additive, resulting in lower excitability.
D) Two excitatory stimuli may be additive, and summation could occur.
E) An excitatory and inhibitory signal can cancel each other out.
C) An excitatory and inhibitory signal can cancel each other out; two excitatory stimuli may be additive, and summation could occur; and two inhibitory stimuli may be additive, resulting in lower excitability.
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Fill in the blank(s) with the appropriate word(s).
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A. diffusion. B. primary active transport with a protein pump. C. secondary active transport with a symporter. D. facilitated diffusion with a carrier. E. pinocytosis.
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