- causes contraction of the smooth muscles in the wall of the uterus. it also stimulates the ejection of milk from the lacting breast
A. Prolactin
B.gonadotropic
C. Oxytocin
D. Antidiuretic hormone
Look up each word/term here -- http://www.onelook.com -- and let us know what you decide.
The correct answer is C. Oxytocin.
To arrive at this answer, we need to understand the functions of each hormone and determine which one is responsible for causing contraction of the smooth muscles in the wall of the uterus and for stimulating the ejection of milk from the lactating breast.
First, let's look at the other options:
A. Prolactin: Prolactin is a hormone released by the anterior pituitary gland that stimulates milk production in the mammary glands. While it is involved in lactation, it does not directly cause contraction of the smooth muscles in the uterus or stimulate milk ejection. Therefore, A is not the correct answer.
B. Gonadotropic: The term "gonadotropic" refers to hormones that affect the gonads (testes or ovaries). Gonadotropic hormones, such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH), play a role in reproductive processes like ovulation and sperm production. However, they are not directly involved in uterine contractions or milk ejection. Therefore, B is not the correct answer.
C. Oxytocin: Oxytocin is a hormone produced by the hypothalamus and released by the posterior pituitary gland. It is responsible for causing contractions of the smooth muscles in the wall of the uterus during childbirth, as well as stimulating the ejection of milk from the lactating breast during breastfeeding. Therefore, C is the correct answer.
D. Antidiuretic hormone (ADH): Antidiuretic hormone (also known as vasopressin) primarily regulates water balance in the body by acting on the kidneys, reducing water loss in urine. It does not have a direct effect on uterine contractions or milk ejection. Therefore, D is not the correct answer.
In conclusion, the hormone that causes contraction of the smooth muscles in the wall of the uterus and stimulates the ejection of milk from the lactating breast is oxytocin (answer choice C).