Which of the following is not an effect of thyroid hormones?

a. Regulation of the metabolic rate

b. Promotion of growth and development

c. Thermoregulation

d. Synergism with the parasympathetic nervous system

Video transcript

Hey, everyone. Let's take a look at this question together, a defect in thyroid hormone synthesis would result in which of the following. Is it? Answer choice. A, a decrease in thyroid stimulating hormone level. Answer choice B A decrease in T three and T four. Answer choice C an increase in T three and T four or answer choice. D normal thyrotropin releasing hormone. Let's work this problem out together to try to figure out which of the following answer choices best explains the result of a defect in thyroid hormone synthesis. So in order to solve this question, we have to recall what we have learned about thyroid hormone to determine how a defect in thyroid hormone synthesis would affect the body. And we can recall that a defect in thyroid hormone synthesis would result in a lack of thyroid hormone production due to that defect in the synthesis of thyroid hormone. And we know that the thyroid produces two hormones which include thyroxine or T four and try I odo thyronine, which is T three. Therefore, a defect in thyroid hormone synthesis would result in the lack of thyroid hormone production, which includes T three and T four. So answer choice B A decrease in T three and T four is the correct answer. And all other answer choices are incorrect since a defect in thyroid hormone synthesis leading to that lack of thyroid hormone production would result in an increase in TSH levels. A decrease in T three and T four and an elevated trh. So answer choice B is the only correct answer choice. I hope you found this video to be helpful. Thank you and goodbye.