The ______ carry blood toward the lungs.
superior and inferior venae cavae
aorta and pulmonary arteries
pulmonary trunk and veins
pulmonary arteries and veins
pulmonary trunk and arteries
The Correct Answer is E
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Monocytes are a type of white blood cell that circulate in the bloodstream. When they migrate into tissues, they differentiate into macrophages, which are large phagocytic cells capable of engulfing and digesting pathogens, cellular debris, and foreign particles. This differentiation is essential for the innate immune response and tissue repair.
Correct Answer is E
Explanation
A. Interventricular septum:The interventricular septum separates the left and right ventricles, providing structural support to the heart, but it does not serve as the anchor for the chordae tendineae.
B. Pectinate muscles:Pectinate muscles are found in the atrial walls, particularly in the right atrium, and are not associated with the AV valves or their chordae tendineae.
C. Interatrial septum:The interatrial septum separates the right and left atria. It has no connection to the chordae tendineae or ventricular valve function.
D. Trabeculae carneae:Trabeculae carneae are irregular muscular ridges on the ventricular walls that help in ventricular contraction, but they do not directly anchor the chordae tendineae.
E. Papillary muscles:Papillary muscles project from the ventricular walls and serve as the attachment point for the chordae tendineae. They contract during ventricular systole to prevent prolapse of the AV valves into the atria, ensuring unidirectional blood flow.
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