The removal of thyroid gland may not produce signs and symptoms of thyroid hormone deficiency, till the period of 7 days after resection. This is because most thyroid hormones released do not travel free in the blood but bind to plasma proteins. When free thyroid hormone levels decrease, plasma proteins release additional bound thyroid hormones.
Thus, there is a large reserve of thyroid hormone and the effect of thyroid gland removal takes approximately one week to become noticeable.
Somatomedins , or insulin-like growth factors (IGFs), are peptide hormones involved in growth. Specifically, they increase the rate at which amino acids are taken up and incorporated into new proteins. They are released by liver cells in response to growth hormone (GH).
Somatomedin concentration is particularly high after eating when blood glucose and amino acid concentrations are high. Therefore, elevated somatomedins in a blood sample would also be indicative of high GH levels.
A)Follicle-stimulating hormone (FSH) is a hormone released from the anterior lobe of the pituitary gland. FSH is a gonadotropin under the control of gonadotropin-releasing hormone (GnRH) in the hypothalamus. FSH targets the sex organs of males and females. In males, it targets the testes and supports spermatogenesis and sperm maturation in the spermatogonia by stimulating nurse cells.
Thus, the correct answer is (a) maturation of sperms by stimulating nurse cells.
b)Muscle strength and development is primarily stimulated by growth hormone (GH), but other hormones contribute to this process. However, FSH does not have role in stimulating muscle and strength.
Thus, the option (b), development of muscle and strength, is incorrect.
c)Luteinizing hormone (LH) stimulates the production of male sex hormones, such as testosterone, by interstitial cells in the testes. It is any such gonadotropin like FSH and has no influence from the latter.
Thus, the option (c), luteinizing hormone, is incorrect.
d)Sex hormones are primarily responsible for the desire for sexual activity. Testosterone is the primary sex hormone in males and estrogen is the primary sex hormone in females. FSH has no direct role in sex drive.
Thus, the option (d), increase desire for sexual activity, is incorrect.