The thyroid ___

A. controls the endocrine system.

B. Regulates the metabolism.

C. controls sexual characteristics.

D. regulates metabolism of glucose

Please help I'm missing part of my book

I'm not sure weather it's A or D @Ms. Sue

To answer the question about the function of the thyroid, we can analyze the options provided:

A. Controls the endocrine system: The endocrine system consists of various glands, including the thyroid gland. While the thyroid gland plays a role in the endocrine system, it does not control the entire system. Therefore, option A is incorrect.

B. Regulates the metabolism: The thyroid gland plays a crucial role in regulating metabolism. It produces hormones, primarily thyroxine (T4) and triiodothyronine (T3), which are involved in regulating the body's metabolism. These hormones help control how fast or slow the body's cells convert nutrients into energy. Therefore, option B is correct.

C. Controls sexual characteristics: The thyroid gland does not directly control sexual characteristics. The development and regulation of sexual characteristics are mainly influenced by the reproductive hormones, such as estrogen and testosterone, which are produced by the ovaries and testes, respectively. Therefore, option C is incorrect.

D. Regulates metabolism of glucose: While the thyroid gland does influence overall metabolism, it is not primarily responsible for regulating the metabolism of glucose specifically. The metabolism of glucose is primarily controlled by the hormone insulin, which is produced by the pancreas. Therefore, option D is incorrect.

Based on this reasoning, the correct answer to the question is B. The thyroid regulates the metabolism.

http://en.wikipedia.org/wiki/Thyroid

http://www.google.com/webhp?sourceid=chrome-instant&rlz=1C5CHFA_enUS705US707&ion=1&espv=2&ie=UTF-8#q=thyroid+definition

Read lots and let us know what you decide.