Which chamber of the heart endures the highest pressures?
Right atrium
Left atrium
Left ventricle
Right ventricle
The Correct Answer is C
The left ventricle is responsible for pumping oxygenated blood out of the heart and into systemic circulation, which requires generating enough pressure to overcome the resistance of the systemic blood vessels. Therefore, the left ventricle has thicker and more muscular walls than the right ventricle and can generate higher pressures during contraction. In contrast, the right ventricle pumps deoxygenated blood to the lungs, which have lower resistance compared to the systemic circulation, and therefore do not need to generate as high pressures.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Cystic fibrosis is a genetic disorder caused by mutations in the CFTR gene, which is inherited in an autosomal recessive manner. This means that a child must inherit two copies of the mutated gene (one from each parent) to develop the disorder. If only one parent carries a copy of the mutated gene, their children will not develop cystic fibrosis but may be carriers of the gene.
Correct Answer is D
Explanation
Elevated pulmonary valvular resistance refers to a condition where there is increased resistance to blood flow through the pulmonary valve and into the lungs. This can lead to an increase in pressure within the right ventricle of the heart, which can eventually lead to right heart failure.
Right heart failure occurs when the right ventricle of the heart is unable to pump blood effectively, which can result in symptoms such as fatigue, shortness of breath, and fluid retention in the legs and abdomen. Causes of right heart failure include pulmonary hypertension, chronic obstructive pulmonary disease (COPD), pulmonary embolism, and other conditions that increase pressure within the pulmonary circulation.
Left heart failure, on the other hand, occurs when the left ventricle of the heart is unable to pump blood effectively, which can lead to symptoms such as shortness of breath, fatigue, and fluid retention in the lungs and legs. Causes of left heart failure include coronary artery disease, hypertension, and valvular heart disease.
Low output failure occurs when the heart is unable to pump enough blood to meet the body's needs, and can result from a variety of conditions affecting the heart muscle or heart valves. High output failure occurs when the heart is working harder than normal to meet the body's demands, such as in conditions such as hyperthyroidism or severe anemia
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