When a cyclist rounds a curve, where does centripetal force act?
A. on the cyclist's center of gravity
B. on the cycle's center of gravity
C. on the tires of the cycle
D. on the ground
C. on the tires of the cycle
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The maturation that occurs within the pre-embryonic and embryonic periods is known as ________.
Fill in the blank(s) with the appropriate word(s).
The hamstring, gemellus, obturator, piriformis, and quadratus femoris muscles all move the femur. They are in the
A. anterior group. B. posterior group. C. medial group. D. lateral group.
This gland atrophies after puberty.
A. Pituitary gland B. thymus C. pineal gland D. thyroid gland
Why is a cell-mediated immune response more effective against intracellular microorganisms (such as viruses) than an antibody-mediated response?
A. Cell-mediated response results in destruction of cells containing the intracellular microorganism; antibodies can not enter cells. B. Cell-mediated (vs. antibody-mediated) response results in activation of many more immune cells, so it is more effective at destroying antigens. C. Intracellular microorganisms are too large for antibodies to be effective against. D. Intracellular microorganisms are too small for antibodies to be effective against.