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Chemical Coordination and Integration · Question 26

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

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.

Answer

(1) epiphyseal plates close after adolescence

Solution

Growth in height occurs at the epiphyseal (growth) plates of long bones. These plates ossify and close after adolescence ⇒ no further increase in length of bones is possible.

As per NCERT, excess secretion of GH in adults, especially in middle age, therefore results in acromegaly (severe disfigurement, especially of the face) and not in increased height.

Answer: (1)

NEET 2017

Keep practising — Chemical Coordination and Integration

2

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)
3

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)
4

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)
5

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)
6

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)
7

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)
8

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

  1. Insulin
  2. Glucagon
  3. Cortisone
  4. Aldosterone
AIPMT 2015
9

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
10

A chemical signal that has both endocrine and neural roles is

  1. epinephrine
  2. cortisol
  3. melatonin
  4. calcitonin.
AIPMT 2015 (Cancelled)
11

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

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