In the absolute refractory period, the excitability of tissues is()
A. zero
B. infinity
C. greater than the normal
D. less than the normal
E. equal to the normal
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The types of humoral regulation often include as following((_)):()
A. paracrine
B. telecrine
C. autocrine
D. neurocrine
E. exocrine
Renal blood flow remains constant induced by ____.()
A. Negative feedback
B. Positive feedback
C. Humoral regulation
D. Nervous regulation
E. Auto-regulation
The((__phase)) of AP of a neuron is formed by()
A. deactivation of Na+ channel
B. Na+ influx
C. K+ efflux
D. Ca2+ influx
E. Cl- influx
When [K+]o increases, the amplitude of RP will _______.()
A. enhance
B. reduce
C. not change
D. disappear
E. enhance or reduce
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