In a blood pressure reading of 110/70, the higher value (110) is the ______ pressure.
diastolic
repolarization
systolic
depolarization
The Correct Answer is C
A. Diastolic: Diastolic pressure is the lower number in a blood pressure reading. It represents the pressure in the arteries when the heart is relaxed between beats, not the higher value.
B. Repolarization: Repolarization refers to the process of cardiac muscle cells returning to a resting electrical state after contraction. It is not directly measured in a blood pressure reading.
C. Systolic: Systolic pressure is the higher number in a blood pressure reading. In this example, 110 mmHg represents the arterial pressure when the ventricles contract, pushing blood into the arteries.
D. Depolarization: Depolarization is the process by which cardiac cells generate an action potential to initiate contraction. It is an electrical event and does not correspond to the numeric values of blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. Superior and inferior venae cavae:The venae cavae carry deoxygenated blood from the body into the right atrium, not toward the lungs. They are part of systemic venous return, not pulmonary circulation.
B. Aorta and pulmonary arteries:The aorta carries oxygenated blood from the left ventricle to the body, so it does not transport blood to the lungs. Only the pulmonary arteries are involved in carrying blood toward the lungs.
C. Pulmonary trunk and veins:The pulmonary veins carry oxygenated blood from the lungs to the left atrium, which is away from the lungs. Only the pulmonary trunk directs blood toward the lungs.
D. Pulmonary arteries and veins:While the pulmonary arteries carry deoxygenated blood to the lungs, the pulmonary veins return oxygenated blood to the heart. Only arteries carry blood toward the lungs.
E. Pulmonary trunk and arteries:The pulmonary trunk originates from the right ventricle and branches into the left and right pulmonary arteries, which transport deoxygenated blood to the lungs for oxygenation. This makes them the correct structures for carrying blood toward the lungs.
Correct Answer is E
Explanation
A. No:This is incorrect because type AB blood has antigens present on the surface of red blood cells. “No” antigens are characteristic of type O blood, not AB.
B. Anti-A and anti-B:Anti-A and anti-B are antibodies found in the plasma, not antigens on the RBCs. Type AB blood does not have these antibodies, which is why it is the universal recipient.
C. Anti-A:Anti-A is an antibody against A antigens, not an RBC surface antigen. Type AB blood does not produce anti-A antibodies because it naturally expresses A antigens.
D. Anti-B:Anti-B is an antibody against B antigens, also not present on the RBC surface. Type AB blood expresses B antigens, so it cannot have anti-B antibodies.
E. A and B:Type AB blood has both A and B antigens on the red blood cell surface. This dual expression explains why the individual does not produce anti-A or anti-B antibodies, allowing them to receive blood from any ABO type.
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