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. Blood pressure typically decreases slightly during the second trimester due to hormonal effects causing vasodilation, and it generally does not rise above pre-pregnancy levels in healthy pregnancies.
B. The heart rate increases by about 10 to 15 beats per minute to meet the increased oxygen demands of the growing fetus and placenta.
C. Blood viscosity does not increase during pregnancy; rather, the plasma volume expands significantly, leading to hemodilution and a decrease in blood viscosity.
D. Cardiac workload increases during pregnancy due to the expanded blood volume and increased cardiac output required to support maternal and fetal needs.
Correct Answer is A
Explanation
A. Relaxation of the uterine smooth muscle occurs during labor and is key for allowing the cervix to dilate. Uterine contractions, which involve smooth muscle contractions, help facilitate cervical dilation and fetal descent into the birth canal.
B. Constriction of cervical smooth muscle would not facilitate dilation. In fact, cervical dilation is enabled by the relaxation of cervical smooth muscle in response to uterine contractions.
C. Stretching of the pelvic smooth muscle helps accommodate the descending fetus, but the primary action for dilation is the uterine contractions and relaxation of the cervix.
D. Contraction of the vaginal smooth muscle occurs during labor but does not directly impact the cervical dilation or fetal descent, as the primary muscular adaptation involved in labor is uterine contractions.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.