What hormones need to be released in order to signal the thyroid gland to secrete thyroid hormone? select all that apply.
a. trh
b. tsh
c. acth
d. crh

Thyroid Stimulating Hormone (TSH)

Explanation:

TSH also called thyrotropin is released by the anterior pituitary gland and stimulates the thyroid glands to secrete the thyroid hormones throxine, triiodothyronine and tetraiodothyronine. Release of TSH is due to the stimulation of the anterior pituitary gland by the hypothalamus through the hormone Thyroid Releasing Hormone (TSH). Adrenocorticotropin hormone (ACTH) is released by the anterior pituitary gland due to hypothalamic stimulation through the hormone Corticotropin Hormone (CRH) that helps in synthesis and release of ACTH.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: