Correct Answer: D

Rationale: A postmature or postterm pregnancy occurs when a pregnancy exceeds the typical term of 38 to 42 weeks. In this situation, the fetus is at risk due to progressive placental insufficiency. This occurs because the placenta loses its ability to function effectively after 42 weeks. The accumulation of calcium deposits in the placenta reduces blood perfusion, oxygen supply, and nutrient delivery to the fetus, leading to potential growth problems. Choices A, B, and C are incorrect because excessive fetal weight, low blood sugar levels, and depletion of subcutaneous fat are not the primary risks associated with postmature fetuses. The main concern lies in the compromised placental function and its impact on fetal well-being.

Correct Answer: D

Rationale: The nurse should recommend isometric exercises for the muscles of the casted extremity. Isometric exercises involve contracting and relaxing muscles without moving the affected part. This type of exercise helps maintain muscle strength without moving the joint, which is important for clients with immobilized extremities. Range of motion exercises involve moving the joint through its full range of motion, which may not be suitable for a client with a long leg cast. Aerobic exercises focus on increasing cardiovascular endurance and may not be appropriate for a client with a casted extremity. Isotonic exercises involve muscle contractions with movement, which may not be safe for the affected extremity in a cast.

Correct Answer: A

Rationale: The correct answer is that normally, the testes descend by one year of age. In young infants, it is common for the testes to retract into the inguinal canal when the environment is cold or the cremasteric reflex is stimulated. The exam should be done in a warm room with warm hands. It is most likely that both testes are present and will descend by a year. Option B is incorrect as not all cases of undescended testes require surgical intervention. Option C is incorrect because feeling only one testis does not necessarily mean the infant only has one testis. Option D is inaccurate as the testes do not normally descend by birth, but rather by one year of age. If the testes do not descend by one year, a full assessment will be needed to determine the appropriate treatment.

Correct Answer: A

Rationale: The correct answer is that Duchenne is an X-linked recessive disorder, meaning the affected gene is located on one of the two X chromosomes of a female carrier. If a son receives the X chromosome bearing the gene, he will develop the disease, giving him a 50% chance of being affected. Daughters, on the other hand, are not affected by Duchenne but have a 50% chance of being carriers since they inherit one copy of the defective gene from the mother. The other X chromosome is inherited from the father, who cannot be a carrier. Therefore, choice A is accurate. Choice B is incorrect because daughters do not develop the disease, and sons have a 50% chance of developing, not both having a 50% chance. Choice C is incorrect as it does not consider the X-linked inheritance pattern of Duchenne. Choice D is inaccurate as it incorrectly states that only sons have a 25% chance of developing the disorder, omitting the carrier status of daughters.

Correct Answer: B

Rationale: Discharge training and planning should begin upon admission for a patient undergoing spinal stenosis surgery. It is crucial to initiate this process early to ensure a smooth transition from hospital care to home or a rehabilitation facility. Starting discharge planning upon admission allows for comprehensive involvement of the patient, family, and healthcare team, which can reduce the risk of readmission, optimize recovery, ensure proper medication management, and adequately prepare caregivers. Therefore, option B, 'Upon admission,' is the correct answer. Options A, C, and D are incorrect because waiting until after surgery, within 48 hours of discharge, or during preoperative discussion would not provide sufficient time for effective discharge planning and education.