Which statement is true about helper T cells?
a. They are useful but are not essential to immune responses.
b. They do not play a role in antibody pro-duction.
c. They have highly specific receptors to an-tigens on their surface.
d. They prevent CD4 molecules from at-taching to antigens.
C
Helper T cells have highly specific cell surface receptors that recognize individual antigens. Helper T cells play an essential role in several functions of the immune response. They have an essential role in the production of antibodies by B cells. They carry CD4 molecules on their sur-face and are also referred to as CD4 cells.
You might also like to view...
Which of the following is appropriate teach for the parents with a two year old? Standard Text: Select all that apply
1. Place hot pots on back burners 2. Teach to obey all traffic and safety rules 3. Keep cleaning solutions in locked cupboards 4. Teach to avoid the effects of drugs and alcohol on judgment and coordination 5. Use large, soft toys with no small detachable or sharp-edged parts
Before inserting a nasogastric tube, the nurse should measure from the:
a. tip of the nose to the earlobe to the xiphoid process. b. bridge of the nose to the xiphoid process. c. nose to the top of the ear to the stomach. d. clavicular notch to the stomach.
Patients with newly diagnosed diabetes are often fearful and nervous about coping with the disease. Only some of their fears are unfounded. Which of these concerns is undeniably true?
A) "I will have to make lifestyle changes.". B) "I can't learn to inject myself with insulin.". C) "I will eventually have to enter a nursing home.". D) "I can't afford a special diet.".
A recently licensed nurse states, "My client keeps saying he is in pain. I don't believe him because I had the same surgery last year and didn't feel nearly as bad as he claims
" What response by the more experienced nurse is most appropriate? 1. "It sounds as if your client is a drug seeker." 2. "You should contact the healthcare provider." 3. "I would call the nursing supervisor for this one." 4. "Pain differs from person to person."