Multiple Choice QuestionsAssertion : 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
A.
If both assertion and reason are true and reason is the correct explanation of assertion
Aldosterone is a steroid hormone or mineralocorticoid produced by the outer-section ie, zona glomerulosa of the adrenal cortex in the adrenal gland to regulate sodium and potassium balance in the blood. It is produced in the cortex of adrenal gland (above the kidneys). It helps in regulating blood pressure. It sends signals to the organs like kidney and colon, that can increase the amount of sodium that the body sends into the blood stream or the amount of potassium released in the urine. It also helps to maintain body's pH and electrolyte levels.
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.
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