Course

Human Biology

Study Pack

Set 11 The Nervous System Integration And Control

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Question 1

(Multiple Choice)

Free
Which one of the following occurs with each cycle of the sodium-potassium pump?

A) Sodium is moved into the cell, creating a net negative charge outside the cell.
B) The net effect is removal of one osmotic particle and one positive charge from inside the cell.
C) The net effect is removal of one osmotic particle and one negative charge from inside the cell.
D) The inside of the cell becomes more negative as potassium is pumped out.
E) Two potassium ions and three sodium ions are pumped out of the cell.

Answer

Question 2

(Multiple Choice)

Free
Oligodendrocytes are similar to Schwann cells in that they

A) are a type of neuroglial cell.
B) are located in the central nervous system.
C) conduct nerve impulses.
D) help neurons regenerate after injury.
E) are located in the peripheral nervous system.

Answer

Question 3

(Multiple Choice)

Free
A neuron at rest has a charge difference across its cell membrane, with the interior of the cell negative relative to the exterior. This difference in charge across the plasma membrane is referred to as ________ potential.

A) action
B) resting
C) graded
D) refractory
E) depolarization

Answer