Absolute refractoriness of a neuron is due to?
AHyperpolarization of Cl channels
BOpening of rectifier K+ channels
CClosure of activated Na channels
DInactivation of Na channels
Some cells secrete chemicals into the extracellular fluid that act on cells in the same tissue. Which of the following refers to this type of regulation?
ANeural
BEndocrine
CNeuroendocrine
DParacrine
Ventricles are lined by?
ASchwann cells
BOligodendrocytes
CEpendymal cells
DAstrocytes
+ 7 more in the PDF
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