Nokea
The menstrual cycle lasts on average 28 days. Day 1 is the first day that ___________ starts, and usually finishes by day 5
- A. Menopause
- B. ovulation
- C. Implantation
- D. menstruation
Correct Answer: D
Rationale: The correct answer is D: menstruation. Day 1 of the menstrual cycle is the first day of menstruation, which typically lasts around 3-7 days. Menstruation is the shedding of the uterine lining when pregnancy has not occurred. This marks the beginning of a new cycle. Menopause (A) is the cessation of menstruation and fertility typically occurring in women in their 40s-50s. Ovulation (B) is the release of an egg from the ovary, usually occurring around day 14 of the cycle. Implantation (C) is the attachment of a fertilized egg to the uterus, which occurs around 6-10 days after ovulation.
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___________is an organelle that helps the sperm to penetrate the ovum.
- A. Acrosome
- B. Zona pellucida
- C. Megalis
- D. None of the above
Correct Answer: A
Rationale: The correct answer is A: Acrosome. The acrosome is an organelle in the head of the sperm that contains enzymes which help the sperm penetrate the outer layer of the ovum during fertilization. It plays a crucial role in the fertilization process.
Explanation of other choices:
B: Zona pellucida is the outer membrane of the ovum that the sperm needs to penetrate, not an organelle within the sperm itself.
C: Megalis is not a relevant organelle involved in fertilization.
D: None of the above is incorrect as the acrosome is the specific organelle that aids in sperm penetration of the ovum.
Birth control pills containing combinations of synthetic estrogen and progesterone compounds given for the first 21 days of the menstrual cycle are effective in preventing pregnancy. What is the explanation for their efficacy?
- A. Prevention of the preovulatory surge of luteinizing hormone secretion from the pituitary gland
- B. Prevention of development of the ovarian follicles
- C. Suppressing function of the corpus luteum soon after it forms
- D. Prevention of normal development of the endometrium
Correct Answer: A
Rationale: The correct answer is A. Birth control pills containing estrogen and progesterone prevent the preovulatory surge of luteinizing hormone (LH) secretion from the pituitary gland. This leads to the inhibition of ovulation, preventing the release of an egg from the ovary. Without ovulation, fertilization cannot occur, effectively preventing pregnancy.
Choice B is incorrect because birth control pills do not prevent the development of ovarian follicles; they prevent ovulation. Choice C is incorrect because suppressing the function of the corpus luteum is not the primary mechanism of action of birth control pills. Choice D is incorrect because birth control pills do not prevent the normal development of the endometrium; they primarily prevent ovulation.
The initiation of puberty and menses in a female, involves increased levels of _____.
- A. FSH
- B. LH
- C. estrogen
- D. progesterone
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.
Three days after having a pelvic exenteration procedure, a client suddenly complains of a 'giving' sensation along her abdominal incision. You check under the dressing and find that the wound edges are open and loops of intestine are protruding. Which action should you take first?
- A. Call the client's surgeon and report that wound evisceration has occurred.
- B. Cover the wound with saline-soaked dressings.
- C. Don sterile gloves and gently replace the intestine back in the wound.
- D. Check the client's blood pressure and heart rate.
Correct Answer: B
Rationale: Covering the exposed tissue with saline-soaked dressings prevents drying and reduces risk of further complications.
Which is true of prostate cancer?
- A. It is commonly lethal.
- B. It is one of the less common forms of cancer.
- C. Family history does not appear to be a risk factor.
- D. Ethnicity is a risk factor.
Correct Answer: D
Rationale: The correct answer is D. Ethnicity is a risk factor for prostate cancer. African American men have a higher risk compared to other ethnicities. This is supported by research and epidemiological studies. Choice A is incorrect as prostate cancer, when detected early, has a high survival rate. Choice B is also incorrect as prostate cancer is one of the most common cancers in men. Choice C is incorrect as having a family history of prostate cancer is a known risk factor.