Which maternal hormone reduces uterine contractions to prevent spontaneous abortions?
Estrogen
Testosterone
Aldosterone
Progesterone
The Correct Answer is D
A. Estrogen plays a role in the development of the uterus and regulation of menstrual cycles, but it does not primarily reduce uterine contractions.
B. Testosterone is a male hormone and does not play a significant role in preventing uterine contractions during pregnancy.
C. Aldosterone helps regulate fluid balance and blood pressure, but it is not responsible for reducing uterine contractions during pregnancy.
D. Progesterone is the hormone primarily responsible for maintaining pregnancy by inhibiting uterine contractions, promoting uterine relaxation, and supporting the early stages of pregnancy. It plays a critical role in preventing spontaneous abortion, especially in early pregnancy.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. It is true that the child’s sex can often be confirmed later in pregnancy, but at 8 weeks, it is typically too early to definitively determine the sex with an ultrasound.
B. At 8 weeks, it is usually not possible to determine the baby’s sex with ultrasound. The external genitalia are not fully developed at this stage.
C. No, the sex organs have not yet started to develop. This is the correct answer. The differentiation of the sex organs begins during the early stages of pregnancy, but they are not visible on ultrasound at 8 weeks.
D. The external genitalia start to become distinguishable a little later in pregnancy, but not as early as the 10th week, making this answer less accurate.
Correct Answer is C
Explanation
A. Relaxation of the uterine smooth muscle would decrease the force of contractions, which could slow labor rather than facilitate cervical dilation. Strong, coordinated uterine contractions are required to push the fetus downward.
B. Constriction of the cervical smooth muscle would prevent dilation, impeding the fetus’s passage through the birth canal. Cervical relaxation and thinning (effacement) are essential for labor progression.
C. Stretching of the pelvic smooth muscle allows the cervix to dilate and the fetus to descend into the pelvis and vaginal canal. This adaptation accommodates the fetal head and body, promoting safe and effective labor.
D. Contraction of the vaginal smooth muscle does not facilitate fetal descent; instead, relaxation of vaginal and perineal tissues is necessary to allow passage of the fetus. Vaginal tone increases resistance, so coordinated stretching is more important than contraction.
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.