Which event takes place during atrial diastole?
Blood fills the left ventricle and empties the right.
Both the left and right atrial chambers fill with blood.
Blood fills the right atrium and empties the left.
Both the left and right atria are emptied of blood.
The Correct Answer is B
A. Blood fills the left ventricle and empties the right: This refers to the ventricles, not the atria, so it is incorrect in the context of atrial diastole.
B. Both the left and right atrial chambers fill with blood: During atrial diastole, the atria relax and fill with blood from the veins (superior/inferior vena cava for the right atrium and pulmonary veins for the left atrium).
C. Blood fills the right atrium and empties the left: This is incorrect because both atria fill with blood during atrial diastole.
D. Both the left and right atria are emptied of blood: This describes atrial systole (contraction), not diastole.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Early spermatid: Early spermatids are haploid cells, round in shape, and have a central nucleus with a significant amount of cytoplasm.
B. Spermatogonium: Spermatogonia are diploid cells found in the basal layer of the seminiferous tubules and are not haploid.
C. Late spermatid: Late spermatids are more elongated and less round as they are close to maturing into sperm.
D. Primary spermatocyte: Primary spermatocytes are diploid cells that undergo meiosis to produce haploid spermatids.
Correct Answer is C
Explanation
A. Expiratory reserve volume: This is included in the calculation of vital capacity (VC = TV + IRV + ERV).
B. Tidal volume: This is also included in vital capacity.
C. Residual volume: The residual volume is the air that remains in the lungs after a forced exhalation and is not part of the vital capacity.
D. Inspiratory reserve volume: This is included in the calculation of vital capacity.
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