Daily MCQs test : physiology

Autocoids Quiz

1. What is the primary source of histamine release in the body?

A) Neurons
B) Erythrocytes
C) Mast cells
D) Adipocytes

2. Which autocoid is involved in regulating inflammation, pain, and blood clotting?

A) Dopamine
B) Serotonin
C) Prostaglandins
D) Acetylcholine

3. Which of the following is NOT a function of prostaglandins?

A) Vasodilation
B) Fever induction
C) Smooth muscle relaxation
D) Bronchoconstriction

4. Which histamine receptor type stimulates gastric acid secretion?

A) H1 receptor
B) H2 receptor
C) H3 receptor
D) H4 receptor

5. Prostaglandins are synthesized from which fatty acid?

A) Stearic acid
B) Arachidonic acid
C) Oleic acid
D) Linoleic acid

6. Which autocoid is involved in increasing blood vessel permeability during inflammation?

A) Nitric oxide
B) Leukotrienes
C) Endocannabinoids
D) Bradykinin

7. What is the role of histamine in vasodilation?

A) It causes vasoconstriction
B) It inhibits blood flow
C) It decreases vascular permeability
D) It widens blood vessels

8. Which autocoid is involved in the "fight or flight" response?

A) Nitric oxide
B) Serotonin
C) Endocannabinoids
D) Prostaglandins

9. Which histamine receptor type is primarily found in the central nervous system?

A) H1 receptor
B) H2 receptor
C) H3 receptor
D) H4 receptor

10. What is the role of prostaglandins in fever induction?

A) They lower the body's temperature set point
B) They have no effect on body temperature
C) They stimulate sweating
D) They raise the body's temperature set point

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