One way to improve respiratory performance with age is to
A) eat smaller meals.
B) stop smoking.
C) sleep longer.
D) maintain normal glucose levels.
E) produce less surfactant.
B
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Explain why excess proteins in the urine of a pregnant woman are an indication of preeclampsia
A) Larger molecules such as proteins more easily pass through the filtration membrane when blood pressure is elevated and is a sign of kidney problems. B) Excess proteins in the urine are a sign of a urinary tract infection, which is a common condition in pregnant women. C) Excess proteins in the urine are a sign of gestational diabetes (diabetes mellitus), which can affect pregnant women. D) Excess proteins in the urine are a sign of physiological stress on the liver, which can occur during pregnancy.
When smooth muscles in the walls of the arteries are stimulated to contract,
A) viscosity increases. B) peripheral resistance decreases. C) blood pressure decreases. D) blood pressure increases.
Why is type O blood called the universal donor?
A. Because everyone with type O blood is Rh+, like most of the population, so this blood type is compatible with all others B. It is not well understood why type O blood can be transfused into people with all blood types. C. Because type O blood plasma does not contain anti-A or anti-B antibodies, so it can be transfused into recipients of any blood type D. Because everyone with type O blood is Rh-, and therefore, this blood type cannot initiate any transfusion reactions E. Because type O red blood cells contain neither antigen A nor antigen B, so they can be transfused into most recipients of any blood type, without being attacked by antibodies
Which best defines cardiac output?
A. The end-diastolic volume minus the end-systolic volume B. The volume of blood in the arterial tree at any moment in time C. The output of the aortic arch baroreceptors D. The product of the heart rate and the volume ejected from the ventricle during a cardiac cycle E. The stroke volume divided by the heart rate