What is the name of the part of the distal convoluted tubule wall that is a part of the juxtaglomerular apparatus?
Vasa recta
Pedicel
Bowman's capsule
Macula densa
The Correct Answer is D
A. Vasa recta: This is a group of capillaries around the nephron loop (loop of Henle), not part of the distal convoluted tubule.
B. Pedicel: These are foot-like projections of podocytes in the glomerulus, not part of the distal convoluted tubule.
C. Bowman's capsule: This surrounds the glomerulus and is part of the filtration process, not the juxtaglomerular apparatus.
D. Macula densa: The macula densa is a group of cells located in the wall of the distal convoluted tubule that senses sodium concentration and regulates blood pressure and filtration rate.
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Related Questions
Correct Answer is A
Explanation
A. Early spermatid: Early spermatids are haploid cells, round in shape, and have a central nucleus with a significant amount of cytoplasm.
B. Spermatogonium: Spermatogonia are diploid cells found in the basal layer of the seminiferous tubules and are not haploid.
C. Late spermatid: Late spermatids are more elongated and less round as they are close to maturing into sperm.
D. Primary spermatocyte: Primary spermatocytes are diploid cells that undergo meiosis to produce haploid spermatids.
Correct Answer is B
Explanation
A. Gastrin: Gastrin stimulates gastric acid secretion in the stomach, not pancreatic bicarbonate.
B. Secretin: Secretin stimulates the pancreas to secrete bicarbonate, which neutralizes stomach acid in the duodenum.
C. Somatostatin: Somatostatin inhibits many digestive processes, including the release of digestive hormones, not bicarbonate.
D. Cholecystokinin (CCK): CCK stimulates the release of digestive enzymes from the pancreas but not bicarbonate.
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