Question Completion Status: QUESTION 17 The red blood cells of type AB blood hav

Question

Question Completion Status: QUESTION 17 The red blood cells of type AB blood have on their surfaces O antigens A and B. O antigen A only. O antigen B only. O neither antigen A nor B O different A and B antigens depending upon circumstances. QUESTION 18 The pulmonary circuit O sends deoxygenated blood to the heart. O brings deoxygenated blood from the tissues. O sends deoxygenated blood to the lungs. O brings oxygenated blood to the tissues. O does none of the above. QUESTION 19 Prothrombin time is a blood test used to evaluate O ABO blood type. O Rh blood type. O blood clotting. O blood flow O serotonin levels. QUESTION 20 The density of capillaries within a tissue varies thickness. O fluid content. O type of matrix. O rate of metabolism surface area. Cick Save and Submit it to save ond submit submit. Click Save All Answers to s

Explanation / Answer

ANSWER 17: A-antigen A and B. Individuals with blood group AB have both A and B antigens on the surface of theri red blood cells.

18: C- Sends deoxygenated blood to the lungs. In the pulmonary circuit, blood takes up oxygen in the lungs, its starts at the right ventricle and ends at the left ventricle. It takes up deoxygenated blood from the right ventricle, to the lungs, where the gas exchange is performed and returns the freshly oxygenated blood to the left ventricle via left atrium.

19: C- Blood clotting. Prothrombin time is a test that is used to measure how long does the blood takes to clot.

20: D- Rate of metablism. The density of capillaries within a tissue varies directly with the tissue's rate of metabolism.

other factors that might affect the density of the capillaries are fibers, partial pressure, oxygen concentration and consumption, and blood flow.

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