Which disorder is common in aging men?
A. Impotence
B. Androgen-insensitivity syndrome
C. Hypospadias
D. Cryptorchidism
Answer: A
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The H zone
a. is the area within the middle of the A band where the thin filaments do not reach b. shortens or disappears during contraction c. contains only thick filaments d. does not contain cross bridges e. is all of the above
The MHC class I antigen complex displays a foreign antigen on the cell surface. This prompts the immune system to destroy
A. B cell clones. B. the displaying cell. C. mature red blood cells. D. extracellular antigens. E. the virus inside the cell, but not the cell.
When the concentration of water in body fluids increases, the secretion of ADH
increases. Indicate whether the statement is true or false
In connective tissue, the extracellular matrix consists of
A. cells and ground substance. B. protein fibers and ground substance. C. cells and protein fibers. D. ground substance and intracellular fluid. E. ground substance only.