Describe the ways in which follicular dendritic cells (FDCs) are similar to subcapsular sinus macrophages
What will be an ideal response?
FDCs and subcapsular macrophages use their CR1 and CR2 receptors not for the purpose of receptor-mediated endocytosis, but rather to bind to antigens tagged with C3d or C3b and to hold them at the cell surface for extended periods of time. Tethering the antigen in this manner facilitates screening by naive B cells as they travel through secondary lymphoid tissues.
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Most heroin addicts are females.
Answer the following statement true (T) or false (F)
Although many benefits accrue from participating in a regular fitness and wellness program, the greatest benefit of all is that physically fit individuals enjoy
a. a better quality of life. b. better athletic performance. c. improved muscular flexibility. d. a healthy immune system.
To help Molly protect herself from contracting a STD, she should
A. assume responsibility for learning about the various STDs. B. not become intoxicated before entering into a sexual situation. C. always have her partner wear a condom during intercourse. D. assume responsibility for learning about the various STDs and not become intoxicated before entering into a sexual situation. E. do all of these choices.
A victim should be considered infectious if the victim has:
A) a closed bruise. B) a runny nose. C) pink skin. D) oozing wounds.