Both the intrinsic and extrinsic clotting pathways activate factors that ________.
A. convert fibrinogen to fibrin
B. convert plasminogen to plasmin
C. convert prothrombin to thrombin
D. None of the choices are correct.
Answer: C
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If all other factors remain the same, which of these results in an increase in the amount of oxygen bound to hemoglobin?
A. Increased plasma temperature B. Increased plasma [2,3 diphosphoglycerate] C. Increased plasma [H+] D. Increased plasma [carbon monoxide] E. Increased plasma PO2
All of the following are characteristics of anaphylaxis except
A) the first exposure does not always lead to a reaction. B) IgE antibodies are produced. C) symptoms include capillary dilation, airway constriction, pain and itching. D) helper T cells are destroyed. E) sensitized mast cells and basophils are stimulated upon each exposure to an allergen.
Underneath the endothelium of arteries is a layer of
A) collagen fibers. B) adipose tissue. C) elastic fibers. D) smooth muscles. E) None of the answers are correct.
Platelets are produced from cells called ________.
A. myeloid stem cell B. hemocytes C. lymphoid stem cell D. megakaryocytes