Lesson Four

Question 1

Between neurons, communication results from:
a. Chemical synapses
b. Action potential
c. Receptor potential
d. Electrical threshold

Answer 1

a. Chemical synapses

Question 2

The Raphe Nuclei are:
a. Hormonergic.
b. Ioninergic.
c. Dopaminergic.
d. Serotoninergic.

Answer 2

d. Serotoninergic.

Question 3

Which of the following is NOT correct about electrical synapses (Gap Junctions)?
a. They involve neurotransmitters.
b. Their facing membranes have large channels that allow ions to move directly from one cell to the other.
c. They are very fast.
d. They are rare in the human Central Nervous System.

Answer 3

a. They involve neurotransmitters.

Question 4

Hormonal communication:
a. Does not interact with behaviours.
b. Works as one-to-one communication.
c. Has a gradual, long-lasting effect.
d. Has a fast, immediate effect.

Answer 4

c. Has a gradual, long-lasting effect.

Question 5

Neurotransmitters are:
a. Synthesized in the presynaptic neuron.
b. Only excitatory.
c. Only inhibitory.
d. Hormonal proteins.

Answer 5

a. Synthesized in the presynaptic neuron.

Question 6

Temporal summation indicates:
a. A neuron that is not firing.
b. Many EPSPs occurring in the same location.
c. Many EPSPs/IPSPs occurring at the same time.
d. Many neurons in the same brain area

Answer 6

c. Many EPSPs/IPSPs occurring at the same time.

Question 7

The chemical synapses start with:
a. An IPSP at the postsynaptic membrane.
b. An action potential arriving at the postsynaptic membrane.
c. An action potential arriving at the presynaptic membrane.
d. An EPSP at the postsynaptic membrane.

Answer 7

c. An action potential arriving at the presynaptic membrane.

Question 8

The core of the diffuse modulatory systems is located in the:
a. Occipital cortex.
b. Spine.
c. Brainstem.
d. Thalamus.

Answer 8

c. Brainstem.

Question 9

The diffuse modulatory systems use:
a. Messages that must be widely broadcast through the brain.
b. Hormonal signals.
c. Point-to-point communication.
d. Interconnected neurons of the autonomic nervous system

Answer 9

a. Messages that must be widely broadcast through the brain.

Question 10

The Hypothalamus is the most important:
a. Relay station for sensory inputs to the cortex.
b. Area for decision making.
c. Area for controlling homeostasis and maintaining the body’s internal environment in a narrow physiologic range.
d. Area for motor execution.

Answer 10

c. Area for controlling homeostasis and maintaining the body’s internal environment in a narrow physiologic range.