Biology - Chemical Coordination and Integration Question with Solution | TestHub
Given below are two statements:
Statement (I): Calcitonin draws calcium from bones, increases calcium absorption in digestive tract, and reduces loss in urine.
Statement (II): Parathyroid hormone decreases calcium release from bones and accelerates uptake of phosphorus by bones.
In light of above statements, choosemost appropriateanswer from options given below.
Options:
Answer:
Solution:
Statement (I) is incorrect because calcitonin is a hypocalcemic hormone. It lowers blood calcium levels by promoting the deposition of calcium in bones, decreasing calcium absorption in the digestive tract, and increasing calcium excretion in urine. The functions described in Statement (I) are actually performed by the parathyroid hormone (PTH).
Statement (II) is incorrect because parathyroid hormone (PTH) is a hypercalcemic hormone. It increases blood calcium levels by stimulating bone resorption (release of calcium from bones into the blood), increasing calcium absorption in the digestive tract, and reducing calcium loss in urine. The functions described in Statement (II) are actually performed by calcitonin.
Therefore, both statements (I) and (II) are incorrect.
Answer: Both statements (I) and statements (II) are incorrect.
