Zymogenic cells of gastric gland secrete from Biology Chemical C

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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


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233.

Zymogenic cells of gastric gland secrete

  • pepsinogen

  • trypsin

  • pepsin

  • chymotrypsin


A.

pepsinogen

The peptic cells or chief cells or zymogenic cells of gastric gland secrete pepsinogen. The enzyme pepsinogen has no proteolytic activity. It is the inactive precursor of pepsin. The proenzyme pepsinogen on exposure to HCl gets converted into the active enzyme pepsin which is the proteolytic enzyme of the stomach.

Pancreatic acinar cells (exocrine part of pancreas) produce pancreatic juice that contains protein-digesting enzymes, namely trypsin, chymotrypsin and carboxypeptidase and carbohydrases like pancreatic a-amylase and lipase.


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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


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


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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