Which statement is correct?
a. In a cold environment, the body gains heat by conduction, convection, radiation, and evaporation.
b. In a hot environment when the temperature of the environment exceeds that of the skin surface, convection is the only means for the body to lose heat.
c. Temperature control centers in the hypothalamus receive input from peripheral thermoreceptors in the skin and central thermoreceptors in the hypothalamus and internal organs.
d. All of the above
e. Only b and c
C
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Indicate whether the statement is true or false
Which of the following systems shows the least overall decline due to aging?
A. Reproductive system B. Urinary system C. Endocrine system D. Muscular system E. Integumentary system
Which capillary would be least likely to allow substances to enter or exit the blood due to tight junctions that join the endothelial cells?
A) sinusoidal capillaries B) fenestrated capillaries C) continuous capillaries D) closed capillaries
The period during which an excitable membrane can respond again, but only if the stimulus is greater than the threshold stimulus, is the ________ period
A) relative refractory B) absolute refractory C) resting D) lag E) stationary