The 'Hormone Galanin' is a neuropeptide widely distributed in the central nervous system and the gastrointestinal tract. Its functions include: MCQ with Answer and Explanation

The 'Hormone Galanin' is a neuropeptide widely distributed in the central nervous system and the gastrointestinal tract. Its functions include:
A. Increasing appetite
B. Stimulating gastric acid secretion
C. Inhibiting insulin and glucagon release, and inhibiting gastric emptying and intestinal motility
D. Stimulating insulin release
Answer: Option C
Solution (By JKExamLibrary)
Galanin is a 29-amino acid neuropeptide that is co-localized with several other neurotransmitters and hormones. In the central nervous system, it is involved in various functions, including the inhibition of acetylcholine release and modulation of pain. In the gastrointestinal tract and pancreas, its primary functions are inhibitory: it inhibits the release of both insulin and glucagon from the pancreatic islets, inhibits gastric emptying and gastric acid secretion, and generally inhibits intestinal motility and secretion. It acts to slow down digestion and nutrient absorption.

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Practice More Biology Questions

Question #1
The hormone that stimulates the growth of the thyroid gland and secretion of thyroxine is:
A. Thyroid-stimulating hormone (TSH)
B. Growth hormone (GH)
C. Adrenocorticotropic hormone (ACTH)
D. Prolactin

Correct Answer: Option A


Explanation:
TSH, released from the anterior pituitary, binds to receptors on thyroid follicular cells, stimulating the synthesis and release of thyroxine (T₄) and triiodothyronine (T₃). TSH release is regulated by thyrotropin-releasing hormone (TRH) from the hypothalamus and feedback inhibition by thyroid hormones. ACTH stimulates adrenal cortex, GH growth, prolactin milk production.

This question belongs to: Science Biology
Question #2
Which of the following is a correct match regarding vitamin and its deficiency disease?
A. Vitamin C - Scurvy
B. Vitamin D - Pellagra
C. Vitamin B₁ - Scurvy
D. Vitamin A - Beriberi

Correct Answer: Option A


Explanation:
Vitamin C deficiency causes scurvy, marked by bleeding gums, poor wound healing, and anemia. Vitamin A deficiency causes night blindness. Vitamin B₁ deficiency causes beriberi. Vitamin D deficiency causes rickets/osteomalacia. Pellagra is due to niacin deficiency. Thus, the correct match is Vitamin C - Scurvy.

This question belongs to: Science Biology
Question #3
Which plant tissue is responsible for transport of organic nutrients?
A. Collenchyma
B. Epidermis
C. Xylem
D. Phloem

Correct Answer: Option D


Explanation:
Phloem transports organic solutes (mainly sucrose) from source to sink. Xylem transports water and minerals. Phloem is composed of sieve tubes and companion cells.

This question belongs to: Science Biology