The thyrotropin releasing hormone, stimulates the secretion of:
a) Growth hormone
b) Prolactin
c) Adrenocorticotrophic hormone
d) Melanocyte stimulating hormone
e) Luteinizing hormone
a) Growth hormone
To determine the correct answer to this question, we need to understand the role of thyrotropin releasing hormone (TRH) and its effects on hormone secretion.
TRH is a hormone produced in the hypothalamus, a region of the brain. Its primary function is to stimulate the release of another hormone called thyroid-stimulating hormone (TSH) from the anterior pituitary gland. TSH, in turn, acts on the thyroid gland to stimulate the production and release of thyroid hormones.
Now, let's analyze the answer choices:
a) Growth hormone: Growth hormone (GH) is not directly influenced by TRH. GH secretion is primarily regulated by growth hormone-releasing hormone (GHRH) and inhibited by somatostatin.
b) Prolactin: TRH does have an effect on prolactin secretion. It stimulates the release of prolactin from the anterior pituitary gland. Therefore, this could be a correct answer.
c) Adrenocorticotrophic hormone (ACTH): TRH does not directly stimulate ACTH secretion. ACTH release is controlled by corticotropin-releasing hormone (CRH) from the hypothalamus.
d) Melanocyte stimulating hormone (MSH): TRH does not have a direct effect on MSH secretion. MSH is primarily regulated by corticotropin-releasing hormone (CRH).
e) Luteinizing hormone (LH): TRH does not directly influence LH secretion. LH release is controlled by gonadotropin-releasing hormone (GnRH) from the hypothalamus.
Based on this analysis, the correct answer to the question is b) Prolactin. TRH stimulates the secretion of prolactin from the anterior pituitary gland.
The thyrotropin-releasing hormone (TRH) stimulates the secretion of:
a) Growth hormone: TRH indirectly stimulates the secretion of growth hormone by stimulating the release of thyrotropin-stimulating hormone (TSH) from the anterior pituitary gland. TSH then stimulates the secretion of growth hormone.
b) Prolactin: TRH directly stimulates the secretion of prolactin. This hormone is responsible for milk production in breastfeeding women and is involved in several other functions.
c) Adrenocorticotrophic hormone (ACTH): TRH indirectly stimulates the secretion of ACTH by stimulating the release of TSH. ACTH is involved in the regulation of cortisol secretion from the adrenal glands.
d) Melanocyte-stimulating hormone: TRH does not directly stimulate the secretion of melanocyte-stimulating hormone (MSH). MSH is primarily regulated by other factors.
e) Luteinizing hormone: TRH does not directly stimulate the secretion of luteinizing hormone (LH). LH is primarily regulated by gonadotropin-releasing hormone (GnRH).