Correct Answer: C

Rationale: The correct answer is C: Biofeedback. Biofeedback is a nonpharmacological technique that uses electronic monitoring equipment to provide real-time data on physiological processes such as heart rate, muscle tension, and skin temperature. Through this feedback, patients learn to control and regulate these bodily functions voluntarily. Choice A, Meditation, involves focusing the mind and reducing stress through techniques like mindfulness or deep breathing, but it does not specifically rely on electronic monitoring equipment. Choice B, Visualization, is a technique where individuals imagine peaceful scenes to promote relaxation and reduce anxiety, and it also does not involve electronic monitoring. Choice D, Chiropractic, is a healthcare profession that focuses on the diagnosis and treatment of musculoskeletal disorders through manual adjustments and manipulation, which is unrelated to the use of electronic monitoring equipment for controlling bodily functions.

Correct Answer: A

Rationale: The correct answer is A: "The use of oral contraceptives." Risk factors for deep vein thrombosis include factors such as immobility, surgery, cancer, obesity, smoking, and the use of oral contraceptives. Choices B, C, and D are incorrect because blood type and Rh factor do not play a role in the development of deep vein thrombosis, and being underweight is not typically considered a risk factor for this condition.

Correct Answer: C

Rationale: A computer hacking episode is considered an internal disaster as it disrupts the internal operations of the healthcare facility, compromising data security and potentially impacting patient care. Choices A, B, and D do not directly relate to internal disasters in a healthcare setting. A patient fall is a patient safety issue, the massive spread of pneumonia is a public health concern, and unexpected staff absences due to illness may affect staffing levels but are not typically classified as internal disasters.

Correct Answer: A

Rationale: The correct answer is A: 1 in 85 births. The rate of twin pregnancies is approximately 1 in 85 births. This means that twins are more common compared to triplets, which occur at a rate of 1 in 8,100 births. Choices B, C, and D are incorrect because they do not reflect the correct frequency of twin pregnancies as stated in the question.

Correct Answer: A

Rationale: Prolonged bed rest can lead to hypocalcemia due to decreased mobility and bone resorption. In this scenario, the low serum calcium level of 4.0 mg/dL is likely a result of decreased bone activity and calcium release due to prolonged bed rest. Renal insufficiency would more likely lead to hypercalcemia due to impaired excretion of calcium by the kidneys. Hyperparathyroidism is characterized by increased calcium levels as a result of excess parathyroid hormone. Excessive ingestion of vitamin D can cause hypercalcemia by increasing intestinal absorption of calcium.