NEET2014ZoologyChemical Coordination and IntegrationActual
Select the correct statement about hormones and their actions
Options
- AParathyroid hormone increases K ⁺ absorption of the body.
- BInsulin and glucagon helps to maintain blood sugar levels.
- COld aged people have weak immunity due to increased activity of thymus.
- DOsteoporosis in women occurs due to increased levels of oestrogens.
Correct answer
B. Insulin and glucagon helps to maintain blood sugar levels.
Step-by-step solution
Parathyroid hormone (PTH) stimulates the reabsorption of Ca ²⁺ by renal tubules and increases Ca ²⁺ absorption from digested food. It means PTH increases the blood Ca ²⁺ level. Old aged persons have weak immunity because thymus is degenerated in old individuals resulting in a decreased production of thymosin. Oestoporosis in women occurs due to decreased level of estrogen.