1. A drug is used to block adrenergic receptors on the post synaptic axon. What

Question

1. A drug is used to block adrenergic receptors on the post synaptic axon. What is the result on Acetylcholine receptors?
a) the slow receptors will be affected.
b) the Na+ voltage gated channels will be affected.
c) no receptors or voltage gates will be affected.
d) the K+ voltage gated channels will be affected.
e) the fast receptors will be affected.

2. Which of the following is a motor point located on the hand that would seemingly move the thumb when stimulated?
a) Lumbricales
b) Abductor pollicis
c) Palmaris brevis
d) Flexor digitorum superficialis
e) Flexor carpi ulnaris

3. A person is confronted by a dangerous dog. His heart begins to race and beat strongly, his pupils dilate, and his hairs stand up. These signs are the result of?
a) sympathetic activation.
b) increased levels of epinephrine in the blood.
c) increased activity of autonomic centers in the hypothalamus.
d) the "fight or flight" response.
e) All of the answers are correct.

4. A doctor places drops in the eyes to dilate the pupils for an examination. The type of drug that is used is a(n) ________ drug:

1) sympathomimetic
2) muscarinic blocking
3 ) adrenergic activating
4) cholinergic activating

choose from the following choices:
a) 1, 2

b) 3

c) 4

d) 1, 2, and 3

e) 2, 4

Explanation / Answer

1)c. No receptors or voltage gates will be affected.

Adrenergic and acetylcholin receptors are parts of 2 opposite response systems of the body- sympathetic and parasympathetic respectively. While the former is responsible for fight and flight while the other brings us back to ground state. Hence blocking one would not create any difference in the stimulation or likewise functioning of the other.

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