CTLA-4 is a co-stimulatory receptor on T cells that belongs to the same family as the CD28 co-stimulatory receptor
However, CTLA-4 is antagonistic to CD28 . Which of the following could be a functional advantage of CTLA-4 expression within the immune response?
A. CTLA-4 competes with CD28 for ligand binding so that, if CD28 binds to its ligand, the response will be magnified.
B. CTLA-4 is often given to immunosuppressed individuals to trigger an immune response.
C. CTLA-4 limits the immune response of TC and TH cells after an infection has been cleared.
D. CTLA-4 limits TC activity in healthy individuals during a viral infection.
E. CTLA-4 reduces the lag time between antigen presentation to a TH cell and B cell activation.
C
You might also like to view...
In 2009, the FDA banned the selling which kind of cigarette, one that can result in 20 times the risk for problems with asthma and lung function?
A) light cigarettes B) bidis C) clove cigarettes D) menthol cigarettes
Which of the following is FALSE regarding sex differences in body composition?
A. During the first six years of life, both males and females experience decreases in body fat. B. Females gain more fat mass during puberty than do males. C. Men are more likely to store fat in their hips and thighs. D. Women typically experience a decline in muscle mass beginning in their 40s.
Which of the following should be avoided before meditating?
A. Coca-Cola B. cigarettes C. coffee D. All of these should be avoided.
Mood swings are psychological/emotional signs of addiction.
a. true b. false