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Chemical Coordination and Integration · Question 27

NEET 2016 (Phase 1)MCQMedium📈 Topic in 12% papers+4−1
1

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

Answer

(2) Relaxin – Inhibin

Solution

Aldosterone increases Na+ and water reabsorption (raises blood pressure), whereas ANF causes vasodilation and decreases blood pressure ⇒ antagonistic.

Parathormone raises blood Ca2+ (hypercalcaemic), whereas calcitonin lowers it (hypocalcaemic) ⇒ antagonistic.

Insulin lowers blood glucose (hypoglycaemic), whereas glucagon raises it (hyperglycaemic) ⇒ antagonistic.

Relaxin (softens the pubic symphysis/cervix at parturition) and inhibin (inhibits FSH secretion) act on unrelated processes ⇒ not antagonistic.

Answer: (2)

NEET 2016 (Phase 1)

Keep practising — Chemical Coordination and Integration

2

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)
3

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)
4

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)
5

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)
6

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)
7

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

  1. Insulin
  2. Glucagon
  3. Cortisone
  4. Aldosterone
AIPMT 2015
8

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
9

A chemical signal that has both endocrine and neural roles is

  1. epinephrine
  2. cortisol
  3. melatonin
  4. calcitonin.
AIPMT 2015 (Cancelled)
10

Identify the hormone with its correct matching of source and function.

  1. Oxytocin – posterior pituitary, growth and maintenance of mammary glands.
  2. Melatonin – pineal gland, regulates the normal rhythm of sleep-wake cycle.
  3. Progesterone – corpus luteum, stimulation of growth and activities of female secondary sex organs.
  4. Atrial natriuretic factor – ventricular wall, increases the blood pressure.
AIPMT 2014
11

Fight-or-flight reactions cause activation of

  1. the parathyroid glands, leading to increased metabolic rate
  2. the kidney, leading to suppression of renin-angiotensin-aldosterone pathway
  3. the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine
  4. the pancreas leading to a reduction in the blood sugar levels.
AIPMT 2014

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