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.
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Related Questions
Correct Answer is D
Explanation
A. Fully mature and leave the epididymis: The acrosome does not play a role in sperm maturation or their release from the epididymis.
B. Travel through the male reproductive ducts: Movement through the reproductive ducts relies on the sperm's flagellum and muscle contractions, not the acrosome.
C. Develop a full set of chromosomes: Chromosome development occurs during spermatogenesis and is unrelated to the acrosome.
D. Breach and fertilize the ovum: The acrosome contains enzymes that allow the sperm to penetrate the ovum during fertilization. Without an acrosome, the sperm would be unable to breach the egg’s outer layer.
Correct Answer is A
Explanation
A. Broad ligament: The broad ligament is a peritoneal fold that supports the uterus and attaches it to the lateral pelvic walls.
B. Adventitia: This is the outer connective tissue layer that supports the uterus but does not suspend it from the pelvic wall.
C. Round ligament: This ligament supports the uterus but primarily connects the uterus to the labia majora and does not suspend it from the lateral pelvic wall.
D. Ovarian fossa: This is a depression in the pelvic cavity that contains the ovaries, but it does not suspend the uterus.
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