★ Immunology Quiz
MHC molecules containing beta-2 microglobulin:
A. contain alpha and beta transmembrane polypeptides
B. participate in the activation of CD4+ T cells
C. are determined by MHC-A, MHC-B and MHC-C genes
D. are determined by MHC-DR genes
E. all of the above
Select your answer:
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In passive transport, substances move across the cell membrane ________ the concentration gradient
A. AGAINST
B. ALONG
C. WITH
D. BETWEEN
Cells, Tissues and Organs › View
Food is broken down in the stomach and the nutrients are absorbed into the blood by the:
A. liver
B. stomach
C. large intestine
D. small intestine