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Hemostasis leads to:
stoppage of bleeding
A 68-year-old male is admitted to the hospital for emphysema. He is hypoxic and his lab tests
reveal low oxygen levels. His hematocrit is 65%. The physician has told him that he has a type of
polycythemia in which he has an increased number of erythrocytes circulating in his
bloodstream. The patient tells the nurse that he does not understand what that means. How
would the nurse explain this in terms the patient could understand?
You have decreased oxygen levels in your blood, and your body has responded by producing
more RBCs, causing a type of polycythemia, the term for excessive RBC production.
The RBC "graveyard" is the liver.
false
Which of the following represents a difference between extrinsic and intrinsic blood clotting
cascades?
One is faster than the other.
The enzyme ______ digests fibrin clots.
plasmin
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,Choose the compatible transfusion.
Donate type O blood to a recipient with type AB blood.
Which ABO blood type is considered to be the universal donor?
O
An individual who is blood type AB negative can ________.
receive any blood type in moderate amounts except that with the Rh antigen
The layers of the heart wall from superficial to deep are:
epicardium, myocardium, and endocardium.
Which of the following does not deliver blood to the right atrium?
Pulmonary veins
The role of the coronary arteries is to:
supply blood to the heart tissue.
What structures connect the individual heart muscle cells?
intercalated discs
If the length of the absolute refractory period in cardiac muscle cells was the same as it is for
skeletal muscle cells ________.
tetanic contractions might occur, which would stop the heart's pumping action
In a healthy individual which of the following would be low?
Afterload
Which of the following would increase heart rate?
Epinephrine
What is afterload?
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, back pressure exerted by arterial blood
If the vagal nerves to the heart were cut, the result would be that ________.
the heart rate would increase by about 25 beats per minute
Which of the following is not part of the conduction system of the heart?
AV valve
As pressure in the aorta rises due to atherosclerosis, more ventricular pressure is required to
open the aortic valve.
True
The aorta is an example of a(n):
elastic artery
Which arteries carry deoxygenated blood?
Pulmonary arteries
The outermost layer of a blood vessel is the tunica intima.
False
What type of tissue is found in the walls of the arteries that leave the heart but not in the walls
of the large veins that enter the heart?
Elastic tissue
Vasodilation is a widening of the lumen due to smooth muscle contraction.
False
Which of the following would decrease peripheral resistance to blood flow?
Anemia
Which capillaries are the most common in the body?
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