The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone

1. calcitonin 

2. prolactin

3. adrenaline

4. melatonin

A gland called ‘Clock of ageing’ that gradually reduces and degenerates in ageing is

1. thyroid
2. thymus
3. parathyroid
4. pituitary

In a child of 15 years age, plasma calcium level is diagnosed below optimum level.Which organ is malfunctioning?

1. Thyroid gland

2. Liver

3. Parathyroid

4. Posterior lobe of pituitary

Assertion             :       Aldosterone increases the volume of blood and other extracellular fluids.

Reason     :     The secretion of aldosterone is stimulated by a fall in the circulating volume of blood.

Assertion  :     Adrenal cortex can be removed without causing death.          

Reason     :     Adrenal cortex is not vital for survival.

Assertion   :       FSH is also known as interstitial cell stimulating hormone.

Reason      :       It is because of the fact that FSH stimulates the interstitial cells of testis.

Assertion   :       Failure of secretion of somatotropin from an early age causes dwarfism in the patient.

Reason      :       Somatotropin hormone stimulates the body growth and elongation of long bones.

Assertion   :       Oxytocin is also known as Anti Diuretic hormone (ADH).

Reason      :       Oxytocin can cause an increase in the renal reabsorption of water.

Assertion   :       Failure of secretion of thyroid gland hormones from childhood causes cretinism disease.

Reason      :       Thyrotropin hormone maintains BMR and promote growth of body tissues.

Assertion   :       The tadpoles become giant tadpoles when fed on thiourea.

Reason      :       Thiourea is an antithyroid substance.