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3.The lowest arterial blood pressure observed during the cardiac cycle is called the ___ pressure.
4.The inferior vena cava has one-way valves that ensure the upward flow of blood toward the heart.
6.If a person moved from the sea shore to a very high mountain, where the air pressure is reduced, what might happen to the hematocrit readings?
red blood cells increase
7.The absolute refractory period in the myocyte results in
the prevention of wave summation and tetanus.
11.It is essential that both ventricles eject the same amount of blood even though the pressure in the right ventricle is much less than the pressure in the left ventricle.
15.You are following the pathway of blood from the superior vena cava to the aorta. What is the correct order of valves through which the blood will pass?
tricuspid, pulmonary, bicuspid, aortic
16.The most common nutrient in the blood is _____; the most common electrolyte is _____; and the most common nitrogenous waste is _____.
protein; Na+; urea
19.Erythropoietin is produced by the liver to stimulate red blood cell production by the bone marrow.
20.The cardiovascular system refers to all of the below except one. The area that is not part of the cardiovascular system is the
21.The formed elements in the blood that have one nucleus are the _____, while the formed elements that have no nucleus are the _____.
leukocytes; erythrocytes and platelets
22.Sickle-cell disease is caused by a dominant allele that alters the structure of hemoglobin.
27.Blood pressure tends to decrease with age due to the loss of arterial elasticity making them less distensible.
28.Which of the following is the correct sequence of events occurring in the cardiac cycle?
atrial systole, atrial diastole, ventricular systole, and ventricular diastole
29.Aldosterone lowers blood pressure by stimulating the kidneys to release excess water and sodium into the urine.
30.In the cardiovascular system, the _____ circuit carries blood to and from the lungs, which is served by the _____ side of the heart.
36.The PR interval on an electrocardiogram represents the electrical events related to the:
37.In skeletal muscle contraction, membrane depolarization lasts for 2 msec; in cardiac muscle, depolarization may last for 250 msec.
38.A differential WBC count shows an abnormally high count of eosinophils. This is a sign of:.
44.___ is secreted in response to hypoxia and produces a negative feedback loop that raises the oxygen concentration of the blood.
46.An emergency room patient has been in an automobile accident. He is unconscious and his medical history is unknown, but he is found to have blood type B+. He needs blood, and only the following types are available. Which would be the safest to administer?
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