Class II MHC genes code for
A. certain secreted complement components.
B. all HLA antigens.
C. self receptors recognized by natural killer cells.
D. receptors located primarily on macrophages, dendritic cells, and B cells.
E. All of these choices are correct.
Answer: D
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The stimulation of a neuron by a signal may ultimately
A) another nerve cell. B) skeletal muscle cells. C) gland cells. D) smooth muscle cells. E) all of the above
____________________ secrete products such as sweat or digestive enzymes through ducts. Fill in the blank(s) with the appropriate word(s)
The first part of the small intestine is the
a. duodenum. b. ileum. c. colon. d. cecum. e. jejunum.
When a product binds to an allosteric enzyme to slow its reaction, it does which of the following?
A) binds to the active site, blocking the binding of substrate B) binds to the substrate, blocking its binding of the active site C) binds to the product production site, stopping the production of product D) binds to a site other than the active site, changing the shape of the active site and decreasing the binding of substrate