Question

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

Select one:

a. Pain

b. Chemotaxis

c. Lipolysis

d. Fever

2. Histamine:

Select one:

a. Induces vasodilation

b. Increase tissue permeability

c. Reduces blood flow to infected tissues

3. The c3a and c5a complement system:

Select one:

a. Promotes hypersensitivity reactions

b. Stimulates the synthesis of leukotrienes.

c. Causes smooth muscle contraction

d. Causes vasodilation

4. Activation of immune response begins with the binding of IgE to Fc receptors on mast cells. True or False?

Select one:

True

False

Answer 1

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

Select one:

a. Pain

b. Chemotaxis

c. Lipolysis --> Prostaglandins does not cause lipolysis

d. Fever

Prostaglandins (PGs) are hormone like chemical substances produced by almost all types of cells. They play a key role in immune reactions, which include inducing fever, chemotaxis. Prostaglandins also cause inflammation and stimulate pain receptors.

2. Histamine:

Select one:

a. Induces vasodilation

b. Increase tissue permeability

c. Reduces blood flow to infected tissues

Histamine is a vasodilator produced during inflammation. It increases the vascular permeability and increase blood flow to the infected tissues (due to vasodilation).