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Class 11 Biology Mcqs

Q:

Which of these functions is reduced by GIP?

A) Spermatogenesis B) GI motility
C) Oogenesis D) Melanin production
 
Answer & Explanation Answer: B) GI motility

Explanation: Motility of the GI tract or the gastrointestinal tract is reduced by GIP or gastric inhibitory peptide. It is a peptide hormone secreted by the endocrine cells of the gastrointestinal tract.

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Q:

Which hormone reduces the secretion of the gastric hormones?

A) GIP B) CCK
C) PRL D) FSH
 
Answer & Explanation Answer: A) GIP

Explanation: GIP or gastric inhibitory peptide is a peptide hormone secreted by the endocrine cells of the gastrointestinal tract or the GI tract. It inhibits or reduces gastric secretion. It helps maintain homeostasis.

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41
Q:

Secretin acts on _____

A) delta cells of pancreas B) beta cells of pancreas
C) exocrine cells of pancreas D) alpha cells of pancreas
 
Answer & Explanation Answer: C) exocrine cells of pancreas

Explanation: Secretin acts on the exocrine cells of pancreas. It stimulates the secretion of water and bicarbonate ions. Hence, secretin, a peptide hormone, helps to maintain the homeostasis of the body.

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Q:

Which of these hormones stimulates the secretion of bile?

A) MSH B) GIP
C) CCK D) PRL
 
Answer & Explanation Answer: C) CCK

Explanation: CCK or cholecystokinin is a peptide hormone secreted by the endocrine cells of the gastrointestinal tract or GI tract. It stimulates the gall bladder to secrete bile juice for the digestion of fats.

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Q:

Which of these hormones stimulates secretion of water and bicarbonate ions?

A) MSH B) CCK
C) Gastrin D) Secretin
 
Answer & Explanation Answer: D) Secretin

Explanation: Secretin is a peptide hormone secreted by the endocrine cells of the gastrointestinal tract. It stimulates the exocrine cells of the pancreas. As a result, water and bicarbonate ions are secreted.

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Q:

CCK is a peptide hormone. True or false?

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: CCK or cholecystokinin is produced by the endocrine tissue present in the gastrointestinal tract. It is a peptide hormone. It has a stimulating effect on pancreas and gall bladder.

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Q:

Hydrochloric acid secretion is stimulated by ______

A) GIP B) CCK
C) gastrin D) secretin
 
Answer & Explanation Answer: C) gastrin

Explanation: Gastrin is a peptide hormone secreted by endocrine tissue located at various parts of the GI tract or gastrointestinal tract. It acts on the gastric glands to stimulate hydrochloric acid secretion.

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Sub Category: Class 11 Biology Mcqs

37
Q:

Pepsinogen secretion is stimulated by ______

A) GIP B) CCK
C) secretin D) gastrin
 
Answer & Explanation Answer: D) gastrin

Explanation: Gastrin is a peptide hormone secreted by endocrine tissue located at various parts of the GI tract or gastrointestinal tract. It acts on gastric glands to stimulate the secretion of pepsinogen.

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