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单选题 Which of the following sequences correctly describes the path of oxygen-depleted blood returning to the heart and being replenished with oxygen
学科：默认课程
时间：2025-09-06 02:17:30
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题目1单选题
The heart is divided into how many chambers, and what are the functions of the upper and lower chambers respectivelyA. Four chambers; the upper chamber pumps blood to the lungs, and the lower chamber pumps blood to the bodyB. Three chambers; the upper chamber receives blood, one lower chamber pumps blood to the lungs, and the other pumps blood to the bodyC. Four chambers; the upper chambers (atria) receive blood, and the lower chambers (ventricles) pump bloodD. Five chambers; the upper chambers receive blood, two middle chambers filter blood, and the lower chambers pump blood
题目2单选题
Which of the following sequences correctly describes the path of oxygen-depleted blood returning to the heart and being replenished with oxygenA. Enters through the left atrium, flows to the left ventricle, then pumped to the lungs via the pulmonary arteriesB. Enters through the right atrium, flows to the right ventricle, then pumped to the lungs via the pulmonary arteriesC. Enters through the right atrium, flows directly to the lungs, then returns oxygen-rich blood to the right ventricleD. Enters through the left atrium, flows to the right ventricle, then pumped to the body via the aorta
题目3单选题
Which of the following statements accurately describes the function of the heart valves mentioned in the text—the tricuspid, mitral, pulmonary, and aortic valves—and their role in maintaining proper blood flowA. The tricuspid valve ensures blood flows from the left atrium to the left ventricle, preventing backflow into the pulmonary veinsB. The mitral valve regulates blood flow from the right atrium to the right ventricle, ensuring blood does not reflux into the vena cava during ventricular contractionC. The pulmonary valve prevents blood from flowing back into the right ventricle when it has been pumped into the pulmonary arteriesD. The aortic valve allows oxygenated blood to flow from the left ventricle directly into the lungs for oxygenation
题目4单选题
Which of the following conditions can disrupt the normal heartbeatA. Myocardial infarction (heart attack), heart disease, and hypertensionB. Regular exercise and emotional excitement onlyC. Hypothyroidism and diabetes exclusivelyD. Asthma and chronic obstructive pulmonary disease (COPD)
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