Nokea
Which of the following is least descriptive of the hypothalamus?
- A. Secretes releasing hormones.
- B. Controls the secretion of the anterior pituitary gland.
- C. Secretes ACTH, TSH, and gonadotropins.
- D. Synthesizes oxytocin and ADH.
Correct Answer: C
Rationale: The correct answer is C because the hypothalamus does not directly secrete ACTH, TSH, and gonadotropins. It secretes releasing hormones that regulate the secretion of these hormones from the anterior pituitary gland. Choice A and B are correct because the hypothalamus does secrete releasing hormones and controls the anterior pituitary gland. Choice D is incorrect because the hypothalamus synthesizes oxytocin and ADH, which are stored in the posterior pituitary gland.
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Regarding iron:
- A. it is more readily absorbed in the ferric form
- B. men lose about 0.6mg/d
- C. average daily iron intake is 40mg
- D. ascorbic acid reduces iron absorption
Correct Answer: B
Rationale: The correct answer is B because men lose about 0.6mg of iron per day through various physiological processes like shedding skin cells and hair. This loss must be replenished through dietary intake to maintain iron balance. Choice A is incorrect as iron is more readily absorbed in the ferrous form. Choice C is incorrect as the average daily iron intake is around 18mg. Choice D is incorrect ascorbic acid enhances iron absorption rather than reducing it.
Selective beta2 stimulants frequently cause:
- A. Skeletal muscle tremors
- B. Tolerance
- C. Tachycardia
- D. All of the above
Correct Answer: D
Rationale: Selective beta2 stimulants typically cause skeletal muscle tremors due to their action on beta2 receptors in skeletal muscles. They can also lead to tolerance with prolonged use, requiring higher doses for the same effect. Additionally, they can cause tachycardia by stimulating beta2 receptors in the heart. Therefore, all of the above choices (A, B, and C) are correct.
Identify the glands that secrete these hormones: glucagon, PTH, and TSH.
- A. Neurohypophysis, pancreas, ovary
- B. Adrenal cortex, pancreas, neurohypophysis
- C. Pancreas, parathyroid, anterior pituitary
- D. Testes, thymus, adenohypophysis
Correct Answer: C
Rationale: The correct answer is C (Pancreas, parathyroid, anterior pituitary) because glucagon is secreted by the pancreas, PTH (parathyroid hormone) is secreted by the parathyroid glands, and TSH (thyroid-stimulating hormone) is secreted by the anterior pituitary gland.
Choice A (Neurohypophysis, pancreas, ovary) is incorrect because the neurohypophysis secretes oxytocin and ADH, not glucagon, PTH, or TSH. The ovary does not secrete any of these hormones.
Choice B (Adrenal cortex, pancreas, neurohypophysis) is incorrect because the adrenal cortex secretes cortisol and aldosterone, not glucagon, PTH, or TSH. The neurohypophysis secretes oxytocin and ADH, not the hormones in question.
Choice D (Testes, thymus, adenohypophysis
Mr. Weber, an insulin-dependent diabetic, states that in the afternoon he has occasional severe reactions during which he becomes unconscious. In planning his care, which of the following nursing actions is most appropriate?
- A. Placing a tube of commercially prepared glucose paste at his bedside
- B. Administering regular insulin
- C. Checking his level of consciousness every hour
- D. Keeping a supply of orange juice in the refrigerator
Correct Answer: A
Rationale: For a patient with severe hypoglycemic reactions, it's essential to have a quick source of glucose on hand, like glucose paste, to treat unconsciousness from low blood sugar.
Which of the following hormones is released from the posterior pituitary gland?
- A. Antidiuretic hormone
- B. Thyroid-stimulating hormone
- C. Parathyroid hormone
- D. Prolactin
Correct Answer: A
Rationale: Antidiuretic hormone (ADH) is released by the posterior pituitary and plays a key role in regulating water balance in the body.