Which part of the nephron from the following image is the main site of secretion for creatinine?
Proximal convoluted tubule
Distal convoluted tubule
Collecting duct
loop of Henle
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Cystic duct: The cystic duct connects the gallbladder to the bile ducts and allows bile to flow into and out of the gallbladder.
B. Common hepatic duct: This duct carries bile from the liver but does not directly lead to the gallbladder.
C. Pancreatic duct: This duct transports digestive enzymes from the pancreas to the duodenum, not bile.
D. Left hepatic duct: This carries bile from the left side of the liver and eventually merges into the common bile duct, but it does not lead directly to the gallbladder.
Correct Answer is B
Explanation
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.
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