Correct Answer: D

Rationale: The correct answer is D because sickle cell disease is an autosomal recessive genetic disorder. The disease is caused by inheriting two copies of the abnormal hemoglobin gene (HbS). In choice D, the father is HbA (normal) and the mother is HbS (carrier). This combination ensures that the child will inherit one normal gene and one abnormal gene, making them a carrier like the mother but not affected by the disease. Choices A, B, and C all involve at least one parent who carries the HbS gene, increasing the risk of the child having sickle cell disease.

Correct Answer: C

Rationale: Step-by-step rationale: 1. The cranial nerve responsible for facial expression is CN VII, the facial nerve. 2. When a neurologist asks a patient to smile, they are testing the function of CN VII. 3. CN II (optic nerve) is responsible for vision, not facial expression. 4. CN X (vagus nerve) is responsible for various functions like heart rate and digestion, not facial expression. 5. CN XI (accessory nerve) is responsible for shoulder movement, not facial expression. Summary: Testing a patient's ability to smile involves assessing the function of CN VII, the facial nerve. Choices A, B, and D are incorrect as they are associated with different functions and not responsible for controlling facial muscles.

Correct Answer: C

Rationale: Objective data are measurable and observable, such as vital signs. Respirations of 16 are a specific numerical measurement that can be quantified. This makes choice C the correct answer as it is factual and quantifiable. Choices A, B, and D are subjective data, as they rely on the patient's feelings or experiences, which are open to interpretation and not measurable. Therefore, the nurse should report choice C as objective data as it provides concrete information for assessment and decision-making.

Correct Answer: D

Rationale: The correct answer is D: Sigmoidoscopy. Sigmoidoscopy is a direct visualization procedure that allows for examination of the lower part of the colon and rectum, where colorectal cancer commonly occurs. This procedure can help identify any abnormal growths or polyps that may indicate cancer. Stool hematest (A) detects blood in stool but does not confirm colorectal cancer. Abdominal CT (B) provides imaging of the abdomen but may not definitively diagnose colorectal cancer. CEA scan (C) measures a tumor marker associated with colorectal cancer but is not a definitive diagnostic test. Thus, sigmoidoscopy is the most appropriate diagnostic study for confirming colorectal cancer.

Correct Answer: A

Rationale: The correct answer is A: Weight. Monitoring daily weight is crucial in assessing fluid retention and worsening heart failure symptoms. Weight gain can indicate fluid overload, a common complication in heart failure. The other choices (B: Appetite, C: Calorie count, and D: Abdominal girth) are not as directly related to monitoring heart failure severity. Appetite and calorie count may be affected by various factors unrelated to heart failure, while abdominal girth may not provide specific information on fluid status. Monitoring weight allows for early intervention and adjustments in treatment to prevent exacerbation of heart failure symptoms.