NEET2019ZoologyChemical Coordination and IntegrationActual
Which of the following conditions will stimulate parathyroid gland to release parathyroid hormone?
Options
- AFall in active vitamin-D levels
- BFall in blood Ca ⁺² levels
- CFall in bone Ca ⁺² levels
- DRise in blood Ca ⁺² levels
Correct answer
B. Fall in blood Ca ⁺² levels
Step-by-step solution
The fall in blood Ca ⁺² levels is the condition which will stimulate parathyroid gland to release parathyroid hormone. This hormone exerts its effects on bones and kidneys. When calcium levels are low, parathyroid hormone is released by the parathyroid glands into the blood and causes the bones to release calcium and increase levels in the bloodstream.