4.

inhibition of platelet aggregation by histamine

5.

inhibition of platelet aggregation by serotonin

4.

Cyproheptadine is useful in treating carcinoid syndrome because of its ability to

1.

activate 5-HT1 receptors

2.

block 5-HT1 receptors

3.

activate 5-HT2 receptors

4.

block 5-HT2 receptors

5.

activate 5-HT4 receptors

5.

In persons with irritable bowel syndrome whose predominant symptom is constipation, intestinal peristaltic

activity may be increased by drugs that

1.

activate 5-HT1 receptors

2.

block 5-HT1 receptors

3.

activate 5-HT2 receptors

4.

block 5-HT2 receptors

5.

activate 5-HT4 receptors

6.

Activation of 5-HT1D receptors is usually beneficial in persons suffering from

1.

carcinoid syndrome

2.

nausea and vomiting

3.

migraine headache

4.

constipation

5.

anxiety

7.

Retroperitoneal and mediastinal fibrosis is a characteristic adverse effect of

1.

methysergide

2.

ergotamine

3.

bromocriptine

4.

sumatriptan

5.

tegaserod

8.

Blockade of 5-HT3 receptors in vagal afferent neurons is useful in preventing

1.

migraine headache

2.

serotonin syndrome

3.

platelet aggregation

4.

nausea and vomiting

5.

constipation