The Central Nervous System Ischemic Response

question 117

Multiple Choice

The central nervous system ischemic response

• A)is triggered by an increase in blood flow to the vasomotor center.
• B)plays an important role in controlling blood pressure under emergency conditions.
• C)is stimulated by a rise in oxygen.
• D)is inhibited by a rise in the level of hydrogen ions.
• E)plays an important role in regulating blood pressure under normal conditions.

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Definitions:

Potassium

A chemical element with symbol K, essential for various cellular processes including the regulation of heartbeat and muscle function.

Tetrodotoxin

A potent neurotoxin found in pufferfish and some other marine species that blocks nerve conduction by inhibiting sodium ion channels.

Sodium Channels

Sodium channels are proteins in cell membranes that allow sodium ions to flow into or out of cells, playing vital roles in the generation and transmission of electrical signals in neurons and muscle cells.

Hyperpolarization

An increase in a cell's membrane potential, making the cell more negative and less likely to fire an action potential.