Which one of the following enzymes is responsible for the convers

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 Multiple Choice QuestionsMultiple Choice Questions

231.

Cells die at the time of release of secretory materials in

  • holocrine gland

  • apocrine gland

  • merocrine gland

  • mixed or apocrine gland


232.

Melatonin is produced from

  • pineal gland

  • adrenal gland

  • parathyroid gland

  • ovary


233.

Zymogenic cells of gastric gland secrete

  • pepsinogen

  • trypsin

  • pepsin

  • chymotrypsin


234.

Which one of the following is called intra-specific chemical messenger?

  • Pheromones

  • Prostaglandins

  • Corticotrophin

  • Catecholamines


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235.

Which one of the following secretes glucagon?

  • Beta (β) cells of islets of Langerhans

  • Alpha (α) cells of islets of Langerhans

  • Acidophilic cells of adenohypophysis

  • Basophilic cells of adenohypophysis


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236.

Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?

  • Catecholamine-O-methyltransferase

  • Phenylalanine-N-methyltransferase

  • DOPA decarboxylase

  • Monoamine oxidase


A.

Catecholamine-O-methyltransferase

Phenylalanine-N-methyltransferase (PNMT) is an enzyme found in the adrenal medulla that converts nor-epinephrine to epinephrine. It is a protein whose encoding gene is found on chromosome 17 in humans. It catalyses the transfer of a methyl group from SAM (S-adenosyl-L-methionine) which is a factor to nor-epinephrine, converting it into epinephrine.


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237.

The hormone that stimulates the release of pancreatic juice is

  • secretin

  • glucagon

  • inhibin

  • insulin


238.

Match the following Columns.
Column I Column II
A. Hyperthyroidism 1. Myxedema
B. Hyposecretion of glucocorticoids 2. Addison's disease
C. Hypothyroidism- I 3. Increased metabolic rate
D. Hyperparathyroidism

4. Cushing's syndrome

5. Kidney stone

  • A- 3; B- 2; C- 1; D- 5

  • A- 3; B- 4; C- 1; D- 2

  • A- 1; B- 4; C- 3; D- 2

  • A- 1; B- 2; C- 3; D- 5


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239.

What would not take place if chromaffin cells of adrenal medulla undergoes oncogenesis?

  • High blood sugar and glucosuria

  • High BMR

  • Pheochromocytomas

  • Low blood pressure


240.

Glands in a vertebrate body originate from

  • ectoderm, mesoderm and endoderm

  • ectoderm and endoderm

  • mesoderm

  • ectoderm


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