When the temperature of the body's surroundings is higher than that of the body itself, the body loses heat through.
a. conduction.
b. radiation.
c. evaporation.
d. none of the above
e. all of the above.
Answer: c. evaporation.
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Acquired immunity results from a(n):
a. Congenital defect b. Contagion c. Hereditary trait d Inoculation event
Which stomach cell secretes pepsinogen?
A. Parietal cell B. Goblet cell C. Enteroendocrine cell D. Chief cell E. Mucous cell
With aging, individuals tend to feel colder and usually need the thermostat in their home set higher in the winter to feel warm enough. This is probably because the elderly
A. exhibit a decrease in melanin production. B. no longer experience hot flashes at night. C. have less blood flowing to the skin. D. experience a decrease in the thickness of their subcutaneous layer. E. have an increase in shedding of stratum corneum cells.
Which is the correct sequence of events in the humoral immune response?
A) Antigen recognition ? antigen presentation ? clonal selection ? differentiation ? attack B) Antigen presentation ? antigen recognition ? clonal selection ? attack differentiation C) Antigen recognition ? differentiation ? antigen presentation ? clonal selection ? attack D) Antigen presentation ? antigen recognition ? clonal selection ? differentiation ? attack E) Antigen recognition ? antigen presentation ? differentiation ? clonal selection ? attack