The hormone that inhibits gastric secretion and motility is: MCQ with Answer and Explanation

The hormone that inhibits gastric secretion and motility is:
A. Cholecystokinin
B. Gastric inhibitory peptide (GIP)
C. Secretin
D. Gastrin
Answer: Option B
Solution (By JKSSB Mock Tests)
GIP (glucose-dependent insulinotropic peptide), released by the small intestine, inhibits gastric acid secretion and motility, and stimulates insulin release. Gastrin stimulates acid secretion, secretin stimulates bicarbonate, CCK stimulates gall bladder contraction. GIP was originally named for its gastric inhibitory effect.

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Practice More Biology Questions

Question #1
The red tides in the ocean are primarily caused by the rapid multiplication of:
A. Green algae
B. Dinoflagellates
C. Cyanobacteria
D. Diatoms

Correct Answer: Option B


Explanation:
Red tides are harmful algal blooms caused primarily by the rapid multiplication of certain marine dinoflagellates, such as Gonyaulax. These blooms discolor the water red or brown and release potent toxins (like saxitoxin) that can kill marine life and cause paralytic shellfish poisoning in humans who consume contaminated seafood. Cyanobacteria can cause freshwater blooms, but not marine red tides.

This question belongs to: Science Biology
Question #2
The animal that exhibits 'canine' teeth adapted for tearing flesh is characteristic of:
A. Omnivores
B. Detritivores
C. Carnivores
D. Herbivores

Correct Answer: Option C


Explanation:
Carnivores have well-developed, sharp, pointed canines for piercing and tearing flesh. Herbivores have reduced or absent canines, with well-developed molars for grinding. Omnivores like humans have moderate canines. Detritivores feed on detritus. Dental formula and tooth type are adaptations to diet. Dogs, cats, and lions have prominent canines.

This question belongs to: Science Biology
Question #3
The 'Hormone Progesterone' is primarily responsible for maintaining pregnancy. During the menstrual cycle, its levels are highest during the:
A. Ovulation phase
B. Menstrual phase
C. Follicular (proliferative) phase
D. Luteal (secretory) phase

Correct Answer: Option D


Explanation:
Progesterone is the primary hormone of the luteal phase (also called the secretory phase) of the menstrual cycle. After ovulation, the ruptured Graafian follicle transforms into the corpus luteum, which secretes large amounts of progesterone. Progesterone prepares and maintains the uterine endometrium (thickening it, increasing blood supply, and stimulating glandular secretion) for the potential implantation of a fertilized egg. If pregnancy does not occur, the corpus luteum degenerates, progesterone levels drop, and menstruation begins.

This question belongs to: Science Biology