Final answer:
Growth hormone is not a tropic hormone because it acts directly on target tissues and cells to promote growth and protein synthesis.
Step-by-step explanation:
Although growth hormone (GH) is involved in regulating growth and protein synthesis in the body, it is not considered a tropic hormone. Tropic hormones are produced by the anterior pituitary gland and act on other endocrine glands to stimulate the production of specific hormones. GH, on the other hand, acts directly on target tissues and cells to promote growth and protein synthesis.