Active tissues receive approximately ________ as much O2 as inactive tissues.
A) 2 times
B) 3 times
C) 5 times
D) 10 times
E) 100 times
B) 3 times
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Consider a cell with a total internal solute concentration of 0.9%. Placing the cell in which bath solution would result in creation of the greatest osmotic pressure in the cell?
A. 0.5% NaCl B. 0.9% NaCl C. 1.2% NaCl
The corpora cavernosa extend within the glans of the penis
Indicate whether this statement is true or false.
Changes in the immune system that accompany aging include
A) T cells becoming less responsive to antigens. B) more cytotoxic T cells responding to infections. C) increased numbers of T helper cells. D) higher levels of antibodies after initial exposure to antigens. E) enlargement of the thymus and increased levels of circulating thymic hormones.
________ are inorganic ions released through electrolytes, such as sodium chloride.
A) Minerals B) Enzymes C) Water-soluble vitamins D) Essential proteins E) Fat-soluble vitamins