Correct Answer: A

Rationale: Estrogen exerts negative feedback on the hypothalamus by inhibiting the release of GnRH (Gonadotropin-Releasing Hormone). GnRH plays a crucial role in the regulation of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) production from the pituitary gland. By inhibiting the release of GnRH, estrogen ultimately leads to a decrease in FSH and LH levels. This process helps to suppress the maturation of the egg and ovulation, providing contraceptive effects.

Correct Answer: D

Rationale: When managing a patient with a suspected heat stroke, the appropriate action is to remove the patient from the hot environment and start cooling the body. Heat stroke is a medical emergency that can be life-threatening if not promptly treated. Cooling the body is essential to lower the core body temperature as quickly as possible. Ice packs should not be directly applied to the skin as they can cause vasoconstriction and may actually hinder heat dissipation. Administering warm intravenous fluids and encouraging the patient to drink cold water rapidly are also not recommended in the initial management of a heat stroke. The priority is to cool the patient down and seek medical attention immediately.

Correct Answer: B

Rationale: Support in maintaining a sense of control is essential in keeping the patient calm during labor. Giving the patient a sense of control allows them to feel empowered and more in charge of their experience. This can help reduce anxiety and fear, ultimately promoting a more positive and calm labor experience. Providing emotional support by assisting the patient in maintaining control can greatly benefit their overall emotional well-being during this stressful time.

Correct Answer: D

Rationale: Late decelerations on the fetal monitor tracing indicate a potential uteroplacental insufficiency, which could be caused by decreased oxygen supply to the fetus. One common cause of late decelerations is uterine hyperstimulation due to excessive use of oxytocin. By discontinuing the oxytocin infusion, the nurse can help alleviate the stress on the fetus and decrease the likelihood of further late decelerations. This action should be prioritized before other interventions such as changing the mother's position or administering oxygen. Immediate delivery may be necessary if the fetus continues to show signs of distress despite discontinuing the oxytocin infusion.

Correct Answer: B

Rationale: In Stage I of Hodgkin's disease, the most commonly seen early symptom is usually unexplained fever and night sweats. Other common symptoms at this stage may include unexplained weight loss, itching, and enlarged lymph nodes in the neck, underarms, or groin. Chest and back pains, subnormal body temperature, and swelling of extremities are not typically early indicators of Stage I Hodgkin's disease.