Water moves back and forth across the plasma membrane by the process of
A. osmosis.
B. filtration.
C. facilitated diffusion.
D. active transport.
E. endocytosis.
A
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Under the influence of progesterone, estrogen exerts negative feedback on the ________, decreasing GnRH, LH, and FSH secretion.
A. hypothalamus and pituitary B. pons and thalamus C. adrenal cortex and medulla D. thyroid and parathyroid
T-cell activation requires ________
A) antigen binding and antibody production B) antigen binding and co-stimulation C) antigen binding, antibody production, and co-stimulation D) antibody production and co-stimulation
Sweating
a. causes vasodilation of the skin vessels b. increases the insulative capacity of the skin so that less heat can be gained from the environment c. is the only heat-loss mechanism available to the body when the environmental temperature is so high that a normal temperature gradient between the skin and the environment cannot be established d. both a and b e. both b and c
Which of the following sutures connects the two parietal bones of the skull?
A) lambdoid B) coronal C) sagittal D) squamous