NEET and AIPMT NEET Zoology Chemical Coordination and Integration MCQ Questions Solved


Oxytocin helps in 

(1) Ovulation

(2) Lactation but not childbirth

(3) Childbirth but not lactation

(4) Lactation and Childbirth both

Audio Explanation:


Refer NCERT Page 332

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Which of the following are not steroid hormones but still do not act through second messenger system, are small, nonpolar and can be taken orally?
1. prostaglandins
2. estrogen and progesterone
3. insulin and glucagon
4. thyroid hormones (T3 and T4)

Audio Explanation:


The iodine in o-position makes the phenolic OH-group more acidic, resulting in a negative charge at physiological pH.

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Which of the following glands secretes the hormone melatonin?
1. anterior pituitary gland.
2. melanocytes.
3. pineal gland.
4. suprachiasmatic nucleus of hypothalamus

Audio Explanation:


This is a simple fact. just remember melatonin is a derivative of tryptophan.

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Which of the following regulates carbohydrate, protein and lipid metabolism in a manner opposite to that of insulin?
1. Glucagon
2. Cortisol
3. Epinephrine
4. Norepinephrine

Audio Explanation:


Cortisol increases blood glucose, causes lipolysis and proteolysis and causes decreased uptake of amino acids by body cells. Insulin has opposite effects.

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Hypocalcemia may lead to:-

1. Kidney stones
2. Cholelithiasis
3. Stronger muscle contractions
4. Tetany

Audio Explanation:


Read page 312, XI NCERT

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Glucocorticoids do not:
1. Stimulate gluconeogenesis
2. Cause lipolysis
3. Cause proteolysis
4. Stimulate cellular uptake and utlization of amino acids

Audio Explanation:


Answer: 4
Read page 335, Xl NCert

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The development of secondary sexual characters in females is primarily controlled by:
1. Estrogen
2. Progesterone
3. LH
4. FSH

Audio Explanation:


Answer: 1
Read page 337, Xl NCERT

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Which hormone stimulates exocrine pancreas to secrete water and bicarbonate ions?
1. Gastrin
2. Cholecystokinin
3. Secretin
4. Gastric inhibitory peptide

Answer: 3
Read page 338, Xl NCERT

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A hormone that has intracellular receptors would be 
1. ACTH
2. ADH
3. Melatonin
4. Aldosterone

Audio Explanation:


Answer: 4
Read page 338, Xl NCERT. Aldosterone is a steroid hormone.

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A hormone that is antagonist to the parathyroid hormone is secreted from :
1. Thyroid
2. Adrenal cortex
3. Hypothalamus
4. Parathyroid itself

Answer: 1
Read page 334, Xl NCERT. The hormone is thyrocalcitonin which is hypocalcemic.

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