T₃ and T₄
A)stimulate the adenohypophysis to secrete TSH.
B)regulate the basal metabolic rate (BMR).
C)stimulate osteoclastic activity,thereby elevating plasma calcium levels.
D)All of the above are true.

Question

Quizplus · Accepted Answer

T₃ and T₄, also known as triiodothyronine and thyroxine respectively, play a key role in regulating the basal metabolic rate (BMR) in the body. They help to increase the metabolic rate, which impacts how quickly the body burns calories and converts food into energy. While T₃ and T₄ may have some impact on the activity of osteoclasts and on the secretion of TSH, their primary role is in regulating the body’s metabolism. Therefore, the best choice is B, as it correctly identifies the main function of these hormones.