A nurse is presenting an in-service about diabetes insipidus. Which of the following pathophysiological mechanisms should the nurse include in the teaching?
Increased insulin resistance in peripheral tissues.
Autoimmune destruction of the pancreatic beta cells.
Decreased production of insulin by the pancreas.
Inadequate secretion of antidiuretic hormone from the posterior pituitary.
The Correct Answer is D
Choice A reason: Increased insulin resistance relates to type 2 diabetes, not diabetes insipidus, which involves water balance, not glucose metabolism. Insulin resistance affects peripheral tissues’ response to insulin, causing hyperglycemia, unrelated to the pituitary’s role in antidiuretic hormone secretion.
Choice B reason: Autoimmune destruction of pancreatic beta cells causes type 1 diabetes, leading to insulin deficiency. Diabetes insipidus is a distinct condition involving antidiuretic hormone deficiency from the pituitary, affecting water reabsorption, not pancreatic function or glucose regulation.
Choice C reason: Decreased insulin production is associated with type 1 diabetes, not diabetes insipidus. The latter results from antidiuretic hormone deficiency, causing excessive water loss via urine. Insulin is irrelevant to the renal water retention mechanism disrupted in diabetes insipidus.
Choice D reason: Diabetes insipidus results from inadequate antidiuretic hormone secretion by the posterior pituitary, impairing renal water reabsorption. This leads to excessive dilute urine output, causing dehydration and thirst, the hallmark pathophysiology distinguishing it from diabetes mellitus, which involves glucose metabolism.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Scoliosis is characterized by a lateral curvature of the spine, often detected during adolescent physical exams. This abnormal curvature disrupts spinal alignment, potentially affecting posture and organ function. It is typically idiopathic in adolescents and requires monitoring or intervention to prevent progression and complications like respiratory restriction.
Choice B reason: Kyphosis involves an excessive outward curvature of the thoracic spine, leading to a hunchback appearance. It is not a lateral curvature, which is specific to scoliosis. Kyphosis may result from poor posture or conditions like Scheuermann’s disease but is unrelated to the described spinal deformity.
Choice C reason: Lordosis is an exaggerated inward curvature of the lumbar spine, often causing a swayback posture. It does not involve lateral curvature, which defines scoliosis. Lordosis can result from obesity or muscular imbalances but is not the condition observed in this scenario.
Choice D reason: Ankylosis refers to joint fusion, often in conditions like ankylosing spondylitis, causing spinal stiffness. It does not describe a lateral curvature of the spine, which is specific to scoliosis. Ankylosis affects joint mobility rather than spinal alignment, making it an incorrect diagnosis here.
Correct Answer is A
Explanation
Choice A reason: Infants have immature immune systems, with underdeveloped adaptive immunity, increasing susceptibility to infections. Limited antibody production and weaker cellular responses make them vulnerable to pathogens, necessitating strict hygiene and timely vaccinations to protect against common infectious diseases in early life.
Choice B reason: Pediatric provider visits can increase infection risk in healthcare settings due to exposure to pathogens from other patients. Nosocomial infections are a concern, especially for infants with immature immunity, making this statement incorrect as it underestimates healthcare-associated infection risks.
Choice C reason: Delaying vaccines increases infection risk, as infants miss timely protection against diseases like measles or pertussis. Vaccines stimulate immunity, reducing susceptibility to pathogens. Delaying them leaves infants vulnerable, particularly with immature immune systems, making this statement factually incorrect.
Choice D reason: Handwashing for 10 seconds is insufficient to reduce infection risk. Guidelines recommend 20 seconds to effectively remove pathogens. Inadequate hand hygiene increases the risk of transmitting bacteria or viruses to infants, whose immature immunity heightens susceptibility, making this advice suboptimal.
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