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
B.
Thymus - starts undergoing atrophy after puberty
The thymus gland is located behind the sternum and between lungs. It is only active until puberty. After puberty, the thymus starts to shrink slowly and become replaced by fat.
The thyroid gland is a vital hormone gland. It plays an important role in the metabolism growth and development of the human body. It helps to regulate many body functions by constantly releasing a steady amount of thyroid hormones into the bloodstream. Cretinism is a type of mental retardation and bodily malformation caused by severe, uncorrected thyroid deficiency.
The major function of parathyroid gland is to maintain the body's calcium and phosphate levels within a very narrow range, so that the nervous and muscular systems can function properly. It secretes parathyroid hormone. It also enhances the excretion of phosphate by the kidneys and its uptake by the cells.
Pancreas is an organ present in abdomen. It plays an essential role in converting the food we eat into fuel for the body's cells. Delta cells is a type of cell found in Islets of Langerhans in pancreas. They form somatostatin, a hormone that inhibits the release of numerous hormones in the body.
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 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 |
The source of somatostatin is same as that of
thyroxine and calcitonin
insulin and glucagon
somatotropin and prolactin
vasopresin and oxytocin
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.
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
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.
