If a cell has 46 chromosomes at the beginning of mitosis, determine the number of chromatids at

Correct Answer: D

Rationale: The correct answer is D: 92 chromatids. In mitosis, each chromosome consists of two sister chromatids. Since the cell begins with 46 chromosomes, there are a total of 92 chromatids present. This is because each chromosome duplicates during the S phase of interphase, resulting in two identical sister chromatids held together by a centromere. Therefore, the total number of chromatids in the cell at the beginning of mitosis is twice the number of chromosomes. Choices A, B, and C are incorrect because they do not account for the duplication of chromatids that occurs during the cell cycle.

Correct Answer: A

Rationale: The correct answer is A: Pyosalpinx. Salpingitis is inflammation of the fallopian tubes, which can lead to the accumulation of pus within the tube, known as pyosalpinx. This is a common complication of salpingitis due to the infection causing the tubes to become blocked and filled with pus. Peritonitis (B) is inflammation of the peritoneum, not directly related to salpingitis. Endometriosis (C) is a separate condition where endometrial tissue grows outside the uterus. Infertility (D) can be a complication of salpingitis, but pyosalpinx is a more direct and immediate consequence.

Correct Answer: D

Rationale: The correct answer is D: cryptorchidism. This is because cryptorchidism specifically refers to the failure of one or both testes to descend into the scrotum. It is a common condition in newborns and can lead to complications if not treated. A: Inguinal hernia is the protrusion of abdominal contents through the inguinal canal, not related to testes descent. B: Strangulated hernia occurs when the blood supply to the herniated tissue is cut off, not related to testes descent. C: Vaginal process is a structure involved in testicular descent but does not describe the failure of testes descent itself. Summary: Cryptorchidism is the correct term for undescended testes, while the other options are unrelated conditions.

Correct Answer: A

Rationale: The process of capacitation occurs in the female reproductive tract, specifically in the vagina. Capacitation is essential for sperm to fertilize an egg, where they undergo changes in the female reproductive tract to become more motile and capable of penetrating the egg. The vagina provides the ideal environment for capacitation to take place due to its specific pH, temperature, and components present in the cervical mucus. The other choices (B: testis, C: prostate, D: epididymis) are incorrect as capacitation is a process that occurs in the female reproductive tract, not in the male reproductive organs.

Correct Answer: C

Rationale: The correct answer is C: estrogen. During puberty in females, the hypothalamus signals the pituitary gland to release hormones, leading to increased estrogen levels. Estrogen plays a key role in the development of secondary sexual characteristics and the onset of menstruation. FSH and LH are also involved in the menstrual cycle but do not directly initiate puberty. Progesterone is mainly involved in the menstrual cycle's later stages, not the initiation of puberty.