Nokea
The drug of choice for monilial diarrhea is: *
- A. Amphothericin B
- B. Nystatin
- C. Ketoconazole
- D. Itraconazole
Correct Answer: B
Rationale: The correct answer is B: Nystatin. Nystatin is the drug of choice for monilial diarrhea because it is an antifungal medication specifically effective against Candida species causing the infection in the gastrointestinal tract. It is not absorbed systemically, making it suitable for gastrointestinal infections. Amphothericin B (A) is used for systemic fungal infections. Ketoconazole (C) and Itraconazole (D) are not typically used for gastrointestinal Candida infections.
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The penicillin G preparation with the longest duration of action is: *
- A. Benzathine penicillin
- B. Sodium penicillin
- C. Potassium penicillin
- D. Procaine penicillin
Correct Answer: D
Rationale: The correct answer is D: Procaine penicillin. Procaine penicillin is a long-acting penicillin formulation due to the addition of procaine, which slows down the release of penicillin into the bloodstream. This results in a prolonged duration of action compared to benzathine, sodium, and potassium penicillin. Benzathine penicillin is also long-acting but primarily used for prevention, not treatment. Sodium and potassium penicillin are not formulated for extended action, making them less suitable for long-term treatment. Therefore, D is the best choice for long-lasting penicillin therapy.
Which hormone plays a central role in determining the rate of sodium reabsorption and potassium secretion?
- A. Insulin
- B. aldosterone
- C. BNP
- D. ANP
Correct Answer: B
Rationale: The correct answer is B: aldosterone. Aldosterone is a hormone produced by the adrenal glands that regulates sodium reabsorption and potassium secretion in the kidneys. It increases the reabsorption of sodium and water while promoting the excretion of potassium. This helps maintain electrolyte balance and blood pressure.
A: Insulin mainly regulates blood sugar levels by promoting glucose uptake into cells.
C: BNP (Brain Natriuretic Peptide) is involved in regulating fluid balance and blood pressure but not specifically sodium reabsorption.
D: ANP (Atrial Natriuretic Peptide) also plays a role in regulating fluid balance and blood pressure, but it promotes sodium excretion instead of reabsorption.
A function of the kidney is to
- A. produce angiotensin
- B. remove microorganisms from the blood
- C. remove aged blood from the blood
- D. regulate blood ionic composition
Correct Answer: D
Rationale: The correct answer is D: regulate blood ionic composition. The kidneys help maintain the body's electrolyte balance by regulating the levels of ions such as sodium, potassium, and calcium in the blood. This is crucial for proper nerve and muscle function, pH balance, and overall homeostasis.
Explanation for why the other choices are incorrect:
A: The production of angiotensin is primarily done by the liver and lungs, not the kidneys.
B: While the kidneys help filter out waste and toxins, they do not specifically target microorganisms in the blood.
C: Removing aged blood from the blood is not a function of the kidneys; this task is mainly carried out by the spleen and liver.
In summary, the kidney's main function is to regulate blood ionic composition to maintain overall bodily functions, making choice D the correct answer.
A nurse is examining a 40-year-old woman for signs of ovarian cancer. She has a family history of ovarian cancer. Which statement does the nurse know to be true regarding ovarian cancer?
- A. Ovarian cancer often does not show symptoms until late stages.
- B. The Pap smear test detects the presence of ovarian cancer.
- C. Women at high risk for ovarian cancer should have an annual pelvic ultrasound.
- D. Women over the age of 50 should be screened for ovarian cancer annually.
Correct Answer: A
Rationale: The correct answer is A: Ovarian cancer often does not show symptoms until late stages. This is true because ovarian cancer is often asymptomatic in the early stages, making it difficult to detect. By the time symptoms appear, the cancer is usually at an advanced stage.
Choice B is incorrect because the Pap smear test is used to detect cervical cancer, not ovarian cancer. Choice C is incorrect because while some high-risk women may benefit from periodic ultrasound screenings, it is not recommended for all women at high risk. Choice D is incorrect because there is no specific annual screening recommendation for ovarian cancer in women over the age of 50.
The following drug may cure typhoid fever, but does not prevent development * of carrier state?
- A. Ceftriaxone
- B. Ciprooxacin
- C. Cotrimoxazole
- D. Chloramphenicol
Correct Answer: D
Rationale: The correct answer is D: Chloramphenicol. It is effective in curing typhoid fever but does not prevent carrier state due to its inability to eradicate the bacteria from the gallbladder. Ceftriaxone, Ciprofloxacin, and Cotrimoxazole can also cure typhoid fever but have been shown to reduce the carrier state development. Chloramphenicol lacks this preventive property, making it the correct answer.