Which scenario will cause pulmonary ventilation to rise?
Increased surface tension
Increased lung compliance
Fewer alveolar sacs
More airway resistance
The Correct Answer is B
A. Increased surface tension: This would decrease ventilation as it increases the force needed to expand the lungs.
B. Increased lung compliance: Compliance refers to how easily the lungs can expand. Increased compliance makes it easier for the lungs to inflate, thereby increasing ventilation.
C. Fewer alveolar sacs: Having fewer alveolar sacs reduces the surface area for gas exchange, which would likely reduce ventilation efficiency.
D. More airway resistance: Increased airway resistance makes it harder to breathe, so it would reduce ventilation rather than increase it.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Enters the superior or inferior vena cava; exits the pulmonary arteries: Deoxygenated blood from the body enters the heart through the superior or inferior vena cava and flows into the right atrium. It then passes into the right ventricle and exits through the pulmonary arteries to the lungs for oxygenation.
B. Enters the aorta; exits the pulmonary veins: The aorta and pulmonary veins both handle oxygenated blood, not deoxygenated blood, making this incorrect.
C. Enters the superior or inferior vena cava; exits the coronary arteries: The coronary arteries supply the heart muscle itself with oxygenated blood, so this is incorrect for deoxygenated blood.
D. Enters the pulmonary veins; exits the aorta: Both the pulmonary veins and the aorta are part of the oxygenated blood circuit, making this incorrect for deoxygenated blood flow.
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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