Cytokines 1-7

Question 1

Cytokines may exhibit _________ action, signaling the cells that produce them

Answer 1

Autocrine

Question 2

Cytokines are NOT:

Answer 2

Antigen specific

Question 3

Several cytokines may have the same effect on the cells they bind. This is an example of:

Answer 3

Redundancy

Question 4

Characterization of cytokine activities is NOT made more difficult by their:

Answer 4

Gene structure

Question 5

Interferons:

Answer 5

Inhibit virus replication by infected cells

Question 6

A cytokine can do all of the following EXCEPT:

A. Bind to receptors which do not share cytokine-binding subunits
B. bind to specific reseptor on the same cell that produced it.
C. bind to receptor antagonists produced by pathogenic viruses.
D. compete with other cytokines whose receptors share signal-transducing subunits.
E. upregulate (increase) synthesis of high affinity subunits for its receptor.

Answer 6

A. Bind to receptors which do not share cytokine-binding subunits

Question 7

Members of a cytokine receptor family:

Answer 7

Are similar in protein structure and sometimes in regions of amino acid sequence.