What is the function of the cervix during pregnancy?

Correct Answer: C

Rationale: The cervix during pregnancy functions to prevent bacterial infection by forming a barrier between the uterus and the outside environment. This is crucial to protect the developing fetus from harmful bacteria. The other choices are incorrect because the cervix does not directly support fetal development, secrete estrogen, or store sperm during pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Testosterone. Testosterone is the primary male sex hormone responsible for the development of male secondary sexual characteristics such as facial hair, deep voice, and muscle growth. It is produced by the testes and plays a crucial role in male reproductive system function. Estrogen (B) is the primary female sex hormone, Progesterone (C) is involved in the menstrual cycle and pregnancy, and FSH (D) is a hormone that stimulates the production of sperm in males and eggs in females.

Correct Answer: A

Rationale: The correct answer is A: Prolactin. Prolactin is the hormone responsible for the secretion of milk in females. It is produced by the anterior pituitary gland and stimulates the mammary glands to produce milk. Oxytocin is also involved in milk ejection but not milk production. Estrogen and progesterone are reproductive hormones and do not directly stimulate milk production.

Correct Answer: C

Rationale: The correct answer is C: Maintain the uterine lining for implantation. Progesterone plays a crucial role in preparing and maintaining the uterine lining to support the implantation and growth of the fertilized egg. This hormone helps create a suitable environment for the developing embryo by thickening the uterine lining and preventing its shedding. Explanation for other choices: A: Stimulate uterine contractions - This is incorrect as progesterone actually inhibits uterine contractions during pregnancy to prevent premature labor. B: Support the development of the fetus - While progesterone indirectly supports fetal development by maintaining the uterine environment, its primary function is not directly related to fetal development. D: Promote breast development - Progesterone does play a role in breast development during pregnancy, but its primary function is not focused on this aspect.

Correct Answer: B

Rationale: The correct answer is B: FSH (Follicle-Stimulating Hormone). FSH stimulates the Sertoli cells in the testes to promote sperm production. Testosterone (A) is responsible for male characteristics, not sperm production. LH (C) stimulates testosterone production in the testes but does not directly stimulate sperm production. Prolactin (D) is not involved in sperm production in males. Therefore, FSH is the correct choice as it directly stimulates the production of sperm in males by acting on the Sertoli cells.