What is the correct order of deoxygenated blood flow as it enters and then exits the heart?
Enters the superior or interior vena cava; exits the pulmonary arteries
Enters the aorta; exits the pulmonary veins
Enters the superior or inferior vena cava; exits the coronary arteries
Enters the pulmonary veins; exits the aorta
The Correct Answer is A
A. Enters the superior or inferior vena cava; exits the pulmonary arteries: Deoxygenated blood from the body enters the heart through the superior or inferior vena cava and flows into the right atrium. It then passes into the right ventricle and exits through the pulmonary arteries to the lungs for oxygenation.
B. Enters the aorta; exits the pulmonary veins: The aorta and pulmonary veins both handle oxygenated blood, not deoxygenated blood, making this incorrect.
C. Enters the superior or inferior vena cava; exits the coronary arteries: The coronary arteries supply the heart muscle itself with oxygenated blood, so this is incorrect for deoxygenated blood.
D. Enters the pulmonary veins; exits the aorta: Both the pulmonary veins and the aorta are part of the oxygenated blood circuit, making this incorrect for deoxygenated blood flow.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Blood pumped into a ventricle in one minute: This describes venous return but not cardiac output.
B. Blood pumped into the atria in one minute: Cardiac output measures blood leaving the heart, not entering the atria.
C. Blood pumped by each ventricle in one minute: Cardiac output is the amount of blood ejected by each ventricle in one minute. It is calculated by multiplying stroke volume (the amount of blood ejected per beat) by heart rate.
D. Blood pumped out of an atrium in one minute: This describes atrial function but is not related to the definition of cardiac output.
Correct Answer is C
Explanation
A. Calcium: Calcium reabsorption primarily occurs in the distal convoluted tubule, not the loop of Henle.
B. Drugs: Drug secretion mainly happens in the proximal convoluted tubule.
C. Urea: Urea is secreted by the loop of Henle, especially in the thin descending limb, as part of the concentration of urine.
D. Bicarbonate ions: Bicarbonate is reabsorbed mainly in the proximal convoluted tubule, not secreted by the loop of Henle.
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