What does cardiac output measure?
Blood pumped into a ventricle in one minute
Blood pumped into the atria in one minute
Blood pumped by each ventricle in one minute
Blood pumped out of an atrium in one minute
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Progesterone: During the luteal phase, the corpus luteum produces the highest levels of progesterone, which is crucial for preparing the uterine lining for potential implantation.
B. LH: Luteinizing hormone (LH) peaks just before ovulation, not during the luteal phase.
C. FSH: Follicle-stimulating hormone (FSH) is primarily active during the follicular phase and has lower levels during the luteal phase.
D. Estrogen: While estrogen levels do rise during the luteal phase, they do not peak as high as progesterone does.
Correct Answer is A
Explanation
A. Proximal convoluted tubule: The proximal convoluted tubule is the main site of creatinine secretion as well as the reabsorption of nutrients and water.
B. Distal convoluted tubule: While secretion occurs here, it is not the main site for creatinine; this site mainly adjusts the final urine concentration.
C. Collecting duct: This part primarily deals with water and electrolyte balance but is not the main site for creatinine secretion.
D. Loop of Henle: This structure plays a key role in water and sodium balance but does not play a significant role in creatinine secretion.
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