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Chemical Coordination and Integration · Question 25

NEET 2017MCQEasy📈 Topic in 12% papers+4−1
1

GnRH, a hypothalamic hormone, needed in reproduction, acts on

  1. anterior pituitary gland and stimulates secretion of LH and FSH
  2. posterior pituitary gland and stimulates secretion of oxytocin and FSH
  3. posterior pituitary gland and stimulates secretion of LH and relaxin
  4. anterior pituitary gland and stimulates secretion of LH and oxytocin.

Answer

(1) anterior pituitary gland and stimulates secretion of LH and FSH

Solution

As per NCERT, gonadotrophin releasing hormone (GnRH) from the hypothalamus stimulates the pituitary (anterior pituitary, adenohypophysis) to synthesise and release gonadotrophins, i.e., LH and FSH.

Oxytocin is released from the posterior pituitary (not under GnRH control) and relaxin is secreted by the ovary/placenta.

Answer: (1)

NEET 2017

Keep practising — Chemical Coordination and Integration

2

Hypersecretion of growth hormone in adults does not cause further increase in height, because

  1. epiphyseal plates close after adolescence
  2. bones lose their sensitivity to growth hormone in adults
  3. muscle fibres do not grow in size after birth
  4. growth hormone becomes inactive in adults.
NEET 2017
3

Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?

  1. Aldosterone – Atrial Natriuretic Factor
  2. Relaxin – Inhibin
  3. Parathormone – Calcitonin
  4. Insulin – Glucagon
NEET 2016 (Phase 1)
4

The amino acid tryptophan is the precursor for the synthesis of

  1. estrogen and progesterone
  2. cortisol and cortisone
  3. melatonin and serotonin
  4. thyroxine and triiodothyronine.
NEET 2016 (Phase 1)
5

Graves' disease is caused due to

  1. hyposecretion of thyroid gland
  2. hypersecretion of thyroid gland
  3. hyposecretion of adrenal gland
  4. hypersecretion of adrenal gland.
NEET 2016 (Phase 2)
6

Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.

  1. Insulin
  2. Glucagon
  3. Secretin
  4. Gastrin
NEET 2016 (Phase 2)
7

The posterior pituitary gland is not a 'true' endocrine gland because

  1. it is provided with a duct
  2. it only stores and releases hormones
  3. it is under the regulation of hypothalamus
  4. it secretes enzymes.
NEET 2016 (Phase 2)
8

Which hormones do stimulate the production of pancreatic juice and bicarbonate?

  1. Angiotensin and epinephrine
  2. Gastrin and insulin
  3. Cholecystokinin and secretin
  4. Insulin and glucagon
Out of syllabusNEET 2016 (Phase 2)
9

Which one of the following hormones is not involved in sugar metabolism?

  1. Insulin
  2. Glucagon
  3. Cortisone
  4. Aldosterone
AIPMT 2015
10

Which one of the following hormones though synthesised elsewhere, is stored and released by the master gland?

  1. Prolactin
  2. Melanocyte stimulating hormone
  3. Antidiuretic hormone
  4. Luteinising hormone
AIPMT 2015
11

A chemical signal that has both endocrine and neural roles is

  1. epinephrine
  2. cortisol
  3. melatonin
  4. calcitonin.
AIPMT 2015 (Cancelled)

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