Medicneet Logo
NEET 2025 · BiologyPrevious Year Question

Consider the following statements regarding function of adrenal medullary hormones: A. It causes pupillary constriction B. It is a hyperglycemic hormone C. It causes piloerection D. It increases strength of heart contraction Choose the correct answer from the options given below:

Answer: (D) B, C and D Only. Answer: (d) B, C and D Only Solution: Adrenal medullary hormones (catecholamines) are hyperglycemic as they stimulate glycogen breakdown raising blood glucose (B), cause piloerection/raising of hairs (C), and increase the strength of heart contraction (D).

  1. A.A, C and D Only
  2. B.D Only
  3. C.C and D Only
  4. D.B, C and D Only✓

Correct Answer

(D) B, C and D Only

Solution & Explanation

Answer: (d) B, C and D Only Solution: Adrenal medullary hormones (catecholamines) are hyperglycemic as they stimulate glycogen breakdown raising blood glucose (B), cause piloerection/raising of hairs (C), and increase the strength of heart contraction (D). They cause pupillary DILATION, not constriction, so statement A is wrong; hence B, C and D are correct. NCERT Reference: Chapter 19, Page 244, Line(s) 8-11 — "These hormones increase alertness, pupilary dilation, piloerection (raising of hairs)... Both the hormones increase the heart beat, the strength of heart contraction and the rate of respiration. Catecholamines also stimulate the breakdown of glycogen"

🎯
43,000+ questions in हिंदी & English · one-tap toggle
Practice NEET 2025 Biology — free, with instant solutions
43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.
📚Practice all NEET Biology PYQs chapter-wise →💡Don't get it? Learn the Chemical Coordination and Integration concepts →
← Biology Q28Biology Q30 →

More NEET PYQ solutions

BiolWhich one of the following is an example of ex-situ conservation?BiolWhich of the following is an example of a zygomorphic flower? (NEET 2025)BiolWhich of the following is an example of actinomorphic flower? (NEET 2024)BiolIn the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called : (NEET 2025)BiolGiven below are two statements: Statement I : In a floral formula the symbol [percentage/division-type symbol] stands for zygomorphic nature of the flower, and G with a bar above it stands for inferior ovary. Statement II : In a floral formula the symbol [same symbol] stands for actinomorphic nature of the flower and G with a bar below it stands for superior ovary. In the light of the above statements, choose the correct answer from the options given below: (NEET 2025)BiolMatch List I with List II: List I — A. Scutellum; B. Non-albuminous seed; C. Epiblast; D. Perisperm. List II — I. Persistent nucellus; II. Cotyledon of Monocot seed; III. Groundnut; IV. Rudimentary cotyledon. Choose the option with all correct matches. (NEET 2025)BiolGiven below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte. E. Transfer of antherozoids to the archegonia in presence of water. Choose the correct answer from the options given below:BiolThe correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division, to produce haploid spores. D. Formation of sporophyte. E. Release of antherozoids into water. Choose the correct answer from the options given below:
More: All NEET 2025 Biology PYQs · NEET Biology PYQs · All NEET PYQs · Previous year papers