Answer:
Hormones that act on the target cells to increase metabolism are Triiodothyronine (T₃) and Thyroxine (T₄).
Step-by-step explanation:
The hormones triiodothyronine (T₃) and thyroxine (T₄) are the active forms of thyroid hormone, responsible for increasing cell metabolism.
Both T₃ and T₄are produced by the thyroid gland, in response to the pituitary hormone TSH. T₄ is more abundant but less powerful than T₃
Thyroid hormones are responsible for controlling cell metabolism, since their increase determines an increase in metabolism, and their deficiency slows it down.
The other options are not correct because:
- Thyrotropin Releasing Hormone (TRH) is produced by the hypothalamus to activate the production of TSH in the pituitary gland.
- Thyroid Stimulating Hormone (TSH) is a pituitary hormone in charge of activating the production of T₃ and T₄ in the thyroid.
- Adrenocorticotropic Hormone (ACTH) is produced by the pituitary gland to stimulate the production of hormones in the adrenal cortex.