Deck 27: Introduction to the Central Nervous System

Question 1

Long-term use of a receptor agonist can lead to:

A) Adaptation of the post-synaptic neuron yielding creation of less receptor density (desensitization)
B) Adaptation of the post-synaptic neuron yielding increased cell messenger production
C) Down regulation yielding less synaptic neurotransmitter.
D) A, B, and C
E) A and B

Answer 1

A and B

Question 2

After the neurotransmitter serotonin attaches to a post-synaptic receptor, it:

A) Releases and is then destroyed by proteases
B) Spontaneously degrades
C) It is taken back up into the pre-synaptic neuron
D) It is taken up by the post-synaptic neuron
E) Is metabolized by acetylcholinesterase

Answer 2

It is taken back up into the pre-synaptic neuron

Question 3

A GABA agonist will result in:

A) Hyperpolarization of post-synaptic neurons
B) The same effect as that of glutamine
C) Decreased seizure threshold
D) Decreased neurotransmitter destruction
E) Decreased chloride ion influx

Answer 3

Hyperpolarization of post-synaptic neurons