Assertion : Aldosterone is a steroid hormone and is important in the control of sodium and potassium ion concentration in mammals.

Reason : It upgrades sodium ion concentration in the ECF by promoting reabsorption of sodium ions from renal tubules and excretion of potassium ions in urine.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Which one of the following four secretions is correctly matched with its source, target and nature of action?

• Secretion	Source	Target	Action
  Gastrin	Stomach lining	Oxyntic cells	Production of HCl

• Inhibin

  Sertoli cells

  Hypothalamus

  Inhibition of secretion of gonadotropin releasing hormone

• Enterokinase

  Duodenum

  Gall bladder

  Release of bile juice

• Atrial Natiuretic Factor (ANF)

  Sinu atrial node (SAN) M- cells of Atria

  Juxta- glomerular apparatus (JGA)

  Inhibition of release of renin

Tadpoles of frog can be made to grow as giant sized tadpoles, if they are

• administered antithyroid substance like thiourea

• administered large amounts of thyroxine

• reared on a diet rich in egg yolk

• reared on a diet rich in both egg yolk and glucose.

Which one of the following four glands is correctly matched with the accompanying description ?

• Thyroid - hyperactivity in young children causes cretinism

• Thymus - starts undergoing atrophy after puberty

• Parathyroid - secretes parathormone which promotes movement of calcium ions from blood into bones during calcification

• Pancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis in liver

Assertion: Our body secretes adrenaline in intense cold.

Reason: Adrenaline raises metabolic rate.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

The source of somatostatin is same as that of

• thyroxine and calcitonin

• insulin and glucagon

• somatotropin and prolactin

• vasopresin and oxytocin

Assertion: Diabetes insipidus is marked by excessive urination and too much thirst of water.

Reason: Anti-diuretic hormone (ADH) is secreted by the posterior lobe of pituitary gland,

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Which is not a gonadal hormone

• Progesterone

• Testosterone

• Adrenalin

• Estrogen

Adrenal gland is derived from

• ectoderm

• mesoderm

• endoderm

• both (a) and (b)

90.

Which endocrine gland becomes inactive in old age

• Adrenal

• Thymus

• Pineal

• Pituitary