An Olympic downhill skier, attempting to win a bronze medal, is midway through the race. Which row now describes accurately the effects of the sympathetic nervous system on the skier's body components?
a) Blood vessles in the skin constrict, sphincters of the digestive tract contracted, bronchioles dilated
b) Blood vessles in the skin constricted, sphincters of the digestive tract relaxed, bronchioles constricted
c) Blood vessles in the skin dilated, sphincters of the digestive tract contracted, bronchioles constricted
d) Blood vessles in the skin dilated, sphincters of the digestive tract relaxed, bronchioles dilated
The body's return to homeostatic levels after vigorous exercise involves
a) inhibition of both the parasympathetic and the sympathetic nervous systems
b) stimulation of the sympathetic nervous system and inhibition of the parasympathetic nervous system
c) stimulation of the parasympathetic nervous system and inhibition of the sympathetic nervous system
d) stimulation of both the parasympathetic and the sympathetic nervous systems