Nokea
Diabetes insipidus is caused due to deficiency of hormone:
- A. Insulin
- B. ADH
- C. Growth hormone
- D. Oxytocin
Correct Answer: B
Rationale: The correct answer is B: ADH (antidiuretic hormone). Diabetes insipidus is a condition characterized by excessive thirst and urination due to a deficiency of ADH, which regulates water balance in the body. Insulin (choice A) is related to diabetes mellitus, not diabetes insipidus. Growth hormone (choice C) and oxytocin (choice D) do not play a direct role in water balance regulation. Therefore, choice B is the most appropriate answer for this question.
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The endocrine gland(s) referred to as the 'master gland' is the:
- A. pancreas
- B. adrenal glands
- C. thyroid gland
- D. pituitary gland
Correct Answer: D
Rationale: The correct answer is D: pituitary gland. The pituitary gland is often referred to as the 'master gland' because it controls the functions of other endocrine glands in the body. It secretes hormones that regulate various bodily functions such as growth, metabolism, and reproduction. It is located at the base of the brain and is divided into two parts: anterior and posterior. The anterior pituitary gland produces and releases several important hormones that influence other endocrine glands. The other choices (A: pancreas, B: adrenal glands, C: thyroid gland) do not have the same broad regulatory control over the endocrine system as the pituitary gland.
All of the following are cardiovascular actions of noradrenaline EXCEPT:
- A. Increases systolic blood pressure
- B. Increases diastolic blood pressure
- C. Reflex bradycardia
- D. Constriction of coronary blood vessels
Correct Answer: D
Rationale: Noradrenaline acts on alpha receptors in the cardiovascular system, leading to increased systolic and diastolic blood pressure. It also causes reflex bradycardia by activating baroreceptors. However, noradrenaline does not directly constrict coronary blood vessels, as it primarily acts on alpha receptors and not on coronary vessels. This lack of direct effect on coronary blood vessels is why option D is the correct answer.
Alexa, a 32-year-old woman, has been diagnosed with metabolic syndrome. Nursing interventions would include teaching her about the typical accompanying signs and symptoms, such as:
- A. Weight loss, malar rash, and pharyngitis.
- B. Hypothyroidism, podagra, and elevated fasting glucose.
- C. Violaceous rash, pitting peripheral edema, and palpitation.
- D. Hypertension, low HDL, and elevated triglycerides.
Correct Answer: D
Rationale: Metabolic syndrome is characterized by a combination of hypertension, low HDL cholesterol, elevated triglycerides, abdominal obesity, and elevated fasting glucose.
A deficiency of insulin causes:
- A. hypocalcemia.
- B. hyperglycemia.
- C. Cushing syndrome.
- D. adrenal shock.
Correct Answer: B
Rationale: The correct answer is B: hyperglycemia. Insulin deficiency leads to an inability to regulate blood sugar levels, resulting in elevated blood glucose levels. Without insulin, glucose cannot enter cells for energy utilization, leading to hyperglycemia. The other choices are incorrect because: A: Hypocalcemia is low calcium levels, not caused by insulin deficiency. C: Cushing syndrome is a hormonal disorder caused by prolonged exposure to high levels of cortisol, not related to insulin deficiency. D: Adrenal shock is a life-threatening condition due to insufficient adrenal gland function, not directly caused by insulin deficiency.
Cushing syndrome and Addison’s disease are:
- A. forms of chronic adrenal cortical hypofunction.
- B. forms of chronic adrenal cortical hypersecretion.
- C. treated with replacement doses of cortisol (i.e., prednisone).
- D. disorders of the adrenal cortex.
Correct Answer: D
Rationale: The correct answer is D because both Cushing syndrome and Addison's disease are disorders of the adrenal cortex. Cushing syndrome involves excessive cortisol production, while Addison's disease is characterized by insufficient cortisol production. Both conditions directly affect the adrenal cortex, leading to hormonal imbalances.
Choice A is incorrect because Cushing syndrome involves hyperfunction, not hypofunction. Choice B is incorrect as it states hypersecretion, which is true for Cushing syndrome but not for Addison's disease. Choice C is incorrect because while replacement cortisol therapy is used for Addison's disease, it is not the only treatment option, and it does not apply to Cushing syndrome.