The internal carotids and the basilar artery are interconnected by an anastomosis called the
A) common carotid artery.
B) basal ring.
C) cerebral arterial circle.
D) external carotid artery.
E) arterial bypass.
Answer: C
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Expiratory neurons
a. are found in both the DRG and VRG b. send impulses to the expiratory muscles during normal quiet breathing c. are stimulated by the phrenic nerve d. are stimulated by the apneustic area e. are inactive during quiet breathing
Describe the pressures in the atria and ventricles that would cause the opening of the AV valves.
What will be an ideal response?
If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. What do you predict will happen to the person’s cells?
A) The cells will lose water and shrink. B) The cells will rupture. C) Extracellular fluids do not impact cell size, because cells contain intracellular fluid. D) The cells will swell.
What is the advantage of breathing through the nose rather than the mouth?
A) The nose warms, humidifies, and filters inhaled air. B) The nose provides a site for initial gas exchange. C) The nose is a less turbulent environment than the mouth. D) The nose provides a more direct route over which air will travel.