Nokea
For fertilization to be accomplished, of the secondary sex characteristics sperm release enzymes to break seen in young women? down the corona radiata from their
- A. enlargement of the accessory ________.
- B. mitochondria
- C. breast development
- D. acrosomes
Correct Answer: D
Rationale: The correct answer is D: acrosomes. Acrosomes are specialized vesicles in the head of the sperm that contain enzymes to help the sperm penetrate the outer layer of the egg during fertilization. Enlargement of the accessory organs (choice A), mitochondria (choice B), and breast development (choice C) are not directly related to the process of fertilization and do not involve the release of enzymes to break down the corona radiata. Acrosomes play a crucial role in the fertilization process by facilitating the penetration of the egg's protective layers, making choice D the correct answer.
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Which of the following sexually transmitted infections is caused by Treponema pallidum?
- A. Herpes
- B. Venereal warts
- C. Gonorrhea
- D. Syphilis
Correct Answer: D
Rationale: Syphilis is caused by the spirochete bacterium Treponema pallidum.
The two oval-shaped organs that produce, store, and release human eggs are called __________________.
- A. clitoris
- B. ovaries
- C. Fallopian tubes
- D. Vagina
Correct Answer: B
Rationale: The correct answer is B: ovaries. Ovaries are the organs responsible for producing, storing, and releasing human eggs. They are oval-shaped and play a crucial role in the female reproductive system. The other choices are incorrect because:
A: clitoris is a small, sensitive organ located near the entrance of the vagina, not involved in egg production.
C: Fallopian tubes are responsible for transporting eggs from the ovaries to the uterus, not for producing or storing eggs.
D: Vagina is the muscular tube connecting the uterus to the outside of the body, not involved in egg production.
The spermatozoon is made up of:
- A. head;
- B. mid piece or neck;
- C. flagellum;
- D. body;
Correct Answer: A
Rationale: The correct answer is A: head. The spermatozoon is composed of three main parts: head, mid piece or neck, and flagellum. The head contains the nucleus which carries genetic material. The mid piece or neck contains mitochondria for energy production. The flagellum is responsible for sperm motility. In this question, the head is the most essential part of the spermatozoon as it contains the genetic material required for fertilization. The other choices (B: mid piece or neck, C: flagellum, D: body) are incorrect as they are important for sperm function but do not carry the genetic material necessary for fertilization.
Infertility could develop when the sperm cells display _____.
- A. a count of 120 million per ml semen
- B. increased acrosomal activity
- C. normal morphology
- D. a count of less than 20 million per ml semen
Correct Answer: D
Rationale: The correct answer is D because a low sperm count (less than 20 million per ml semen) can lead to infertility as it decreases the chances of successful fertilization. A high sperm count (choice A) is actually beneficial for fertility. Increased acrosomal activity (choice B) can enhance fertilization potential. Normal morphology (choice C) refers to the shape and size of sperm, which is important for fertility but not the primary factor in infertility due to low sperm count. Overall, a low sperm count is the most significant factor in infertility.
The uterine artery vascularizes:
- A. the vagina;
- B. the Fallopian tubes;
- C. the uterus;
- D. the vulva;
Correct Answer: C
Rationale: The correct answer is C: the uterus. The uterine artery vascularizes the uterus, providing the main blood supply to this reproductive organ. This artery plays a crucial role in supplying oxygen and nutrients to the uterus, supporting the growth and development of the endometrium and the fetus during pregnancy.
Choice A, the vagina, is incorrect because the vaginal artery, not the uterine artery, supplies blood to the vagina. Choice B, the Fallopian tubes, is incorrect as they are primarily vascularized by the tubal branches of the ovarian arteries. Choice D, the vulva, is also incorrect as the blood supply to the vulva comes from multiple sources including the internal pudendal artery and the external pudendal artery, not the uterine artery.