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AIIMS 2005
Exam
AIIMS
Year
2005
Subject
Zoology
Chapter
Chemical Coordination and Integration

AIIMS 2005 · Zoology · Chemical Coordination and Integration

Which one of the following four glands is correctly matched with...

Which one of the following four glands is correctly matched with the accompanying description ?

Options

  1. AThyroid - hyperactivity in young children causes cretinism
  2. BThymus - starts undergoing atrophy after puberty
  3. CParathyroid - secretes parathormone which promotes movement of calcium ions from blood into bones during calcification
  4. DPancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis in liver

Correct answer

B. Thymus - starts undergoing atrophy after puberty

Step-by-step solution

Cretinism is a type of mental retardation and bodily malformation caused by severe, uncorrected thyroid deficiency in infancy and early childhood Delta cells is a type of cell in the pancreas (the organ of the digestive system located behind the stomach). Within the pancreas, the delta cells are located in areas called the islets of Langerhans. The delta cells make somatostatin, a hormone that inhibits the release of numerous hormones in the body. Somatostatin has a variety of functions. Taken together, they work to reduce the rate at which food is absorbed from the contents of the intestine. Somatostatin is also secreted by the hypothalamus and by the intestine.Beta cells in the pancreatic islets secrete the hormone insulin in response to a high concentration of glucose in the blood. Parathyroid hormone is a hormone secreted by the parathyroid glands that regulates the metabolism of calcium and phosphate in the body. Parathyroid hormone acts to raise the extracellular calcium concentration, that is, the concentration of calcium ions in the spaces between the cells of the body and in the blood plasma; it promotes the absorption of calcium by the intestine, mobilizes calcium salts from the bones, and increases the tendency of the kidney to recover calcium from the urine. The hormone also enhances both the excretion of phosphate by the kidneys and its uptake by the cells.
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