A nurse is assisting in the care of a client at 10 weeks of gestation who asks how the biological sex of the fetus is determined. Which of the following responses should the nurse make?
"Biological sex is determined when the zygote experiences implantation"
“Biological sex is determined by the specific combination of sex chromosomes present in the DNA.”
“Biological sex is determined when cell division takes place within the foramen ovale”
"Biological sex is determined when the blastocyst forms during fertilization."
The Correct Answer is B
A. Implantation of the zygote does not affect the determination of biological sex. The biological sex is already determined at the time of fertilization.
B. Sex chromosomes (XX for female and XY for male) determine biological sex. This combination is established at fertilization when the sperm and egg combine to form the zygote.
C. The foramen ovale is a hole in the fetal heart that allows blood to bypass the lungs in utero and is unrelated to the determination of biological sex.
D. The blastocyst formation is an early developmental stage after fertilization but does not determine biological sex. It is the combination of sex chromosomes that determines whether the fetus is male or female.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. A decrease in saliva production may aggravate the disorder is incorrect. While excessive salivation (ptyalism) is a symptom of hyperemesis gravidarum, a decrease in saliva production is not the primary factor contributing to the disorder.
B. Decreasing gastric secretions lead to increased nausea is incorrect. While nausea and vomiting are key features of hyperemesis gravidarum, the decrease in gastric secretions does not directly cause it. The disorder is typically associated with an increase in hCG, dehydration, and electrolyte imbalances.
C. An increase in human chorionic gonadotropin (hCG) levels may contribute to this disorder is correct. Hyperemesis gravidarum is often linked to elevated levels of hCG, a hormone produced during pregnancy, which may lead to increased nausea and vomiting.
D. Symptoms begin and are most severe during the second trimester of pregnancy is incorrect. Hyperemesis gravidarum typically presents in the first trimester and may improve after that, although severe cases can last longer.
Correct Answer is A
Explanation
A. The gynecoid pelvis is considered the most favorable for vaginal delivery due to its rounded shape, wide pelvic inlet, and spacious dimensions, which facilitate the passage of the fetal head.
B. The platypelloid pelvis is flat and wide, often posing challenges for vaginal delivery due to its narrow anteroposterior diameter.
C. The android pelvis has a heart-shaped inlet, making it less favorable for vaginal delivery as it can cause difficulty in fetal descent.
D. The anthropoid pelvis has an oval shape and is more favorable for vaginal delivery than android or platypelloid pelves, but it is still less optimal compared to the gynecoid pelvis.
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