1. The most susceptible part of the NS is: A. Synapse C. Hippocampus B. NCB D. C

Question

1. The most susceptible part of the NS is:

A.   Synapse       C.   Hippocampus

B.   NCB               D.   Cerebrum

2. a-adrenergic receptors respond primarily to:

A.   Norepinephrine       C.   Acetylcholine

B.   Epinephrine            D.   Muscarine

3. Collections of NCB within the CNS with a common function are called:

A.   Ganglia         C.   Sulci

B.   Gyri               D.   Nuclei

4. When a neuron is depolarizing (phase I):

A.   Na+ is coming in          C.   Na+ is going out

B.   K+ is coming in             D.   K+ is going out

Explanation / Answer

1. The answer is: Synapse.

Synapse is most susceptible to toxins and drugs.

2. The answer is: A. Norepinephrine

a-adrenergic receptors respond primarily to norepinephrine. They also respond to epinephrine and isoprenaline but norepinephrine is its primary agonist.

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