Blood loss is likely to stimulate the secretion of higher than normal plasma levels of erythropoietin.
Indicate whether the statement is true or false.
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Question 2) The primary stimulus for erythropoietin secretion is decreased iron concentrations in the liver.
Indicate whether the statement is true or false.
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Question 3) At rest, more blood flows per minute to the kidneys and abdominal organs than to the muscles and skin.
Indicate whether the statement is true or false.
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Question 4) All blood vessels that carry well-oxygenated blood are called arteries.
Indicate whether the statement is true or false.
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Question 5) Which of the following is NOT an anticoagulant or stimulator of blood clot dissolution?
A. vitamin K
B. aspirin
C. thrombin
D. heparin
E. tissue plasminogen activator (t-PA)
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Question 6) Which of the following statements regarding blood clotting is TRUE?
A. Blood clotting requires activation of thrombin.
B. Blood clotting is enhanced by prostaglandin I2 (PGI2) and nitric oxide.
C. A blood clot is a network of interlacing strands of fibrinogen.
D. Blood clotting occurs too rapidly in indivduals with the disease hemophilia.
E. Injecting tissue plasminogen activator (t-PA) into a patient who is bleeding will aid blood clotting.
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Question 7) Which of the following statements about blood clotting is NOT true?
A. It is the formation of a thrombus.
B. It occurs after formation of a platelet plug in a damaged vessel.
C. It requires the presence of erythrocytes.
D. It is a result of a cascade of enzyme activation.
E. It involves positive feedback by thrombin.
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Question 8) Which of the following statements regarding the dissolving of blood clots is FALSE?
A. Activation of the reactions that lead to blood clotting ultimately lead to blood clot dissolution.
B. Tissue plasminogen activator (t-PA) is secreted by endothelial cells.
C. Blood clots are digested by plasmin.
D. Plasminogen is an inactive precursor of the enzyme plasmin.
E. It involves aggregation of soluble fibrin fragments into fibrin.
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Question 9) What is hemostasis?
A. the maintenance of relatively stable conditions in the internal environment
B. the prevention or stoppage of blood loss
C. a disease in which blood clot formation is impaired
D. a protein inside red blood cells that binds oxygen with high affinity
E. the set point for normal arterial blood pressure
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Question 10) Which is an intermediary protein that enables platelets to adhere to collagen?
A. tissue plasminogen activator (t-PA)
B. ATP
C. von Willebrand factor (vWF)
D. arachidonic acid
E. activated protein C
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