Practice test 3

Question 1

In multipolar neurons, voltage-gated channels are most commonly found where

Answer 1

In the membrane of axons.

Question 2

The effect that a neurotransmitter has on the postsynaptic membrane depends on:

Answer 2

1. The frequency of neurotransmitter release.
2. The chemical nature of the neurotransmitter.
3. The characteristic of the receptor to which it binds.
4. The quantity of neurotransmitter released.

Question 3

Regulating smooth, sequential skeletal muscle contractions and comparing intended bodily movement with what is actually happening at the muscles is an important function of the:

Answer 3

Cerebellum.

Question 4

Across excitable membranes, differences in intracellular and extracellular concentrations of ions are due to:

Answer 4

1. The permeability characteristics of the membrane.
2. The presence of negatively charged proteins and other anions inside of the cell.
3. The activity of the sodium potassium pump (Na+/K+-ATPase).

Question 5

Spinal reflexes:

Answer 5

Work even if the brain is destroyed.

Question 6

The (BLANK) fibers are white matter in the cerebrum that connect corresponding gygi in the two
hemispheres.

Answer 6

Commissural fibers

Question 7

Where are voltage-gated channels found in unipolar neurons?

Answer 7

In the membranes of axons, telodendria, and dendrites

Question 8

What are the two types of glial cells found in the peripheral nervous system?

Answer 8

Neurolemmocytes and satellite cells.

Question 9

What kinds of cells are chemically gated and voltage gated channels found?

Answer 9

Muscle cells and Nerve cells