Nokea
A couple has been told that the male partner, who is healthy, is producing no sperm 'because he has cystic fibrosis.' Which of the following explanations is accurate in relation to this statement?
- A. Since the man is healthy
- B. he could not possibly have cystic fibrosis.
- C. Men with cystic fibrosis often have no epididymis.
- D. The expressivity of cystic fibrosis is variable.
Correct Answer: B
Rationale: Men with cystic fibrosis frequently have congenital absence of the vas deferens, leading to azoospermia.
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The nurse is analyzing the pedigree shown below. How should the nurse interpret the genotype of the individuals in locations IV-9 and IV-10?
- A. Fraternal twins.
- B. Unaffected couple.
- C. Proband and sister.
- D. Known heterozygotes.
Correct Answer: D
Rationale: The symbols indicate known heterozygotes.
What is the purpose of performing a hysterosalpingogram (HSG) during fertility evaluation?
- A. To determine ovarian reserve and egg quality.
- B. To visualize the fallopian tubes and check for blockages.
- C. To assess hormone levels during the menstrual cycle.
- D. To evaluate the sperm motility in the uterine cavity.
Correct Answer: B
Rationale: Performing a hysterosalpingogram (HSG) during fertility evaluation helps visualize the fallopian tubes and check for blockages. This is crucial as blocked fallopian tubes can prevent eggs from meeting sperm, leading to infertility. By injecting contrast dye into the uterus and taking X-ray images, doctors can assess tubal patency. This procedure is not aimed at determining ovarian reserve or egg quality (option A), assessing hormone levels (option C), or evaluating sperm motility in the uterine cavity (option D), as these factors are assessed through different tests and procedures.
The nurse is reviewing the medical record of a woman in labor and notes that the fetal position is documented as LSA. The nurse interprets this information as indicating which part as the presenting part?
- A. occiput
- B. face
- C. buttocks
- D. shoulder
Correct Answer: C
Rationale: The correct answer is C because in the notation LSA, the S denotes the sacrum or buttocks as the presenting part. The occiput is denoted by O, face by M, and shoulder by A.
The parents have just received news that their infant has sickle cell disease. They ask the nurse if this could happen to future children. Because this is an example of an autosomal-recessive inheritance, what should the nurse tell Tim and Katie?
- A. Because this child has sickle cell, there is a decreased chance none of your other children will have sickle cell disease.
- B. Each time you get pregnant, there will be a 50/50 chance that your child will have sickle cell disease.
- C. Each time you get pregnant, there will be a 25% chance that your child will inherit the gene from each parent and will have sickle cell disease.
- D. Your next child will have a 50% chance of being a carrier for sickle cell disease.
Correct Answer: C
Rationale: The correct answer is C: Each time you get pregnant, there will be a 25% chance that your child will inherit the gene from each parent and will have sickle cell disease. This is because sickle cell disease follows an autosomal-recessive inheritance pattern, meaning both parents must pass on the sickle cell gene for a child to have the disease. With each pregnancy, there is a 25% chance that the child will inherit one sickle cell gene from each parent, resulting in the disease. Choices A and D are incorrect because they do not accurately reflect the inheritance pattern of sickle cell disease. Choice B is incorrect because it suggests a 50/50 chance, which is not the case with autosomal-recessive inheritance.
During a consultation, a patient asks about the role of estrogen in the menstrual cycle. What is the nurse's best explanation?
- A. Estrogen triggers the release of mature eggs from the ovaries.
- B. Estrogen supports the growth of the uterine lining for implantation.
- C. Estrogen prevents ovulation during pregnancy.
- D. Estrogen regulates the production of progesterone.
Correct Answer: B
Rationale: The correct answer is B: Estrogen supports the growth of the uterine lining for implantation. Estrogen plays a key role in the menstrual cycle by stimulating the thickening of the endometrium (uterine lining) to prepare for potential implantation of a fertilized egg. This process occurs during the proliferative phase of the menstrual cycle. Choice A is incorrect because ovulation is primarily triggered by luteinizing hormone (LH) surge, not estrogen. Choice C is incorrect as estrogen levels decrease during pregnancy, allowing ovulation to occur. Choice D is incorrect because while estrogen and progesterone work together in the menstrual cycle, estrogen does not directly regulate progesterone production.