Answer the following questions true (T) or false (F)
1. An antigen may consist of multiple epitopes, each of which recognized by different lymphocytes.
2. Allorecognition occurs when B and T cells are screened for self-tolerance.
3. Graft-versus-host disease occurs when transplanted bone marrow gives rise to B and T cells that attack the recipient's tissues.
1. TRUE
2. FALSE
3. TRUE
You might also like to view...
The biome with the most complex diversity is the ____
a. tundra b. taiga c. tropical rain forest d. desert e. grassland
The endosperm of a plant
a. is the food supply for the new sporophyte plant. b. is composed of haploid tissue. c. protects the young embryo within a seed. d. provides a connection between the ovary of a flower and a developing seed. e. produces sperm cells
__________ stop fluid from leaking across an
epithelium. Fill in the blank(s) with the appropriate word(s).
True or False: In the early 1900s, a United States resident was most likely to die from infectious disease, whereas today nonmicrobial systemic diseases are the leading cause of death
a. TRUE b. FALSE