Nokea
The secretion of which of the following would be least affected by a decrease in extracellular fluid volume?
- A. CRH
- B. Arginine vasopressin
- C. Dehydroepiandrosterone
- D. Estrogens
Correct Answer: D
Rationale: The correct answer is D: Estrogens. When extracellular fluid volume decreases, the body activates the renin-angiotensin-aldosterone system to retain water and sodium. Estrogen is not directly involved in regulating fluid balance, so its secretion would be least affected. CRH (choice A) stimulates the release of cortisol, which affects fluid balance. Arginine vasopressin (choice B) regulates water reabsorption in the kidneys. Dehydroepiandrosterone (choice C) is a precursor to sex hormones, including estrogen.
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Intravenous administration of epinephrine to a patient results in a severe decrease in diastolic pressure and an increase in cardiac output. Which of the following drugs might the patient have previously taken that could account for this unexpected effect?
- A. Propranolol
- B. Atropine
- C. Phenylephrine
- D. Prazosin
Correct Answer: D
Rationale: The correct answer is D: Prazosin. Prazosin is an alpha-1 adrenergic receptor antagonist, which blocks the vasoconstrictor effect of catecholamines like epinephrine, leading to vasodilation and a decrease in diastolic pressure. The unexpected effect of a decrease in diastolic pressure and an increase in cardiac output after epinephrine administration suggests that the patient might have taken a drug that blocks alpha-1 receptors. Propranolol (A) is a beta-blocker, which would not cause this effect. Atropine (B) is a muscarinic receptor antagonist and would not explain the observed effects. Phenylephrine (C) is an alpha-1 agonist, so it would not result in the described response. Therefore, Prazosin (D) is the most likely drug the patient previously took to account for the unexpected effects of epinephrine administration.
The correct term for the digestive tract that begins at the mouth and finishes at the anus is called?
- A. Digestive passage
- B. Elementary canal
- C. Alimentary canal
- D. Intestinal tract
Correct Answer: C
Rationale: The correct term for the digestive tract that begins at the mouth and finishes at the anus is called the alimentary canal. This term specifically refers to the entire passage through which food passes and is digested. The term "alimentary" pertains to nourishment or nutrition, making it the most accurate description of the digestive tract.
A: Digestive passage is too broad and vague, not specifying the entire route of digestion.
B: Elementary canal is not a commonly used term in anatomy to describe the digestive tract.
D: Intestinal tract specifically refers to the section of the digestive system that includes the small and large intestines, excluding the mouth, esophagus, and stomach.
The nurse assesses the diabetic patient's technique of self-monitoring of blood glucose (SMBG) 3 months after initial instruction. Which error in the performance of SMBG noted by the nurse requires intervention?
- A. Doing the SMBG before and after exercising
- B. Puncturing the finger on the side of the finger pad
- C. Cleaning the puncture site with alcohol before the puncture
- D. Holding the hand down for a few minutes before the puncture
Correct Answer: C
Rationale: Alcohol on the skin can interfere with glucose readings and should not be used to clean the puncture site.
Which of the following glands disappears during old age?
- A. Thymus
- B. Parathyroid
- C. Thyroid
- D. Pituitary
Correct Answer: A
Rationale: The thymus gland is the correct answer because it involutes or shrinks with age, leading to decreased immune function. The parathyroid, thyroid, and pituitary glands do not disappear with old age but may undergo changes in function. The parathyroid regulates calcium levels, the thyroid controls metabolism, and the pituitary gland secretes various hormones. Therefore, the thymus gland is the only gland that disappears during old age, making it the correct answer.
A patient who is on corticosteroid therapy for treatment of an autoimmune disorder has the following additional drugs ordered. Which one is used to prevent corticosteroid-induced osteoporosis?
- A. Potassium
- B. Alendronate (Fosamax)
- C. Furosemide (Lasix)
- D. Pantoprazole (Protonix)
Correct Answer: B
Rationale: Alendronate is used to prevent osteoporosis caused by corticosteroid therapy by inhibiting bone resorption and improving bone density.