Chapter 16: Purines

Chapter 16: Purines

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. Urinary levels of 5-hydroxyindole acetic acid provide an indication of the body’s production of

1. adenosine
2. serotonin
3. adenosine triphosphate
4. histamine
5. endothelin

Answer b: serotonin

1. Some of the effects of theophylline are attributed to antagonism of

1. glutamate
2. 5-hydroxytrypamine
3. adenosine
4. norepinephrine
5. histamine

Answer c: adenosine

1. The effects of chemical mediators on platelets include

1. stimulation of platelet aggregation by adenosine diphosphate
2. stimulation of platelet aggregation by adenosine
3. inhibition of platelet aggregation by adenosine diphosphate
4. inhibition of platelet aggregation by histamine
5. inhibition of platelet aggregation by serotonin

Answer a: stimulation of platelet aggregation by adenosine diphosphate

1. 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

Answer d: block 5-HT₂ receptors