Nursing Elites

1. What is the primary function of the kidneys in acid-base balance?

• A. The kidneys remove hydrogen ions and retain bicarbonate ions.
• B. The kidneys convert ammonia into urea, which is excreted in the urine.
• C. The kidneys produce aldosterone to regulate sodium levels.
• D. The kidneys secrete renin to regulate blood pressure.

Correct answer: A

Rationale: The correct answer is A. The kidneys are crucial in maintaining acid-base balance by removing hydrogen ions to decrease acidity and retaining bicarbonate ions to increase alkalinity. Choice B is incorrect because the conversion of ammonia into urea is related to nitrogen waste excretion, not acid-base balance. Choice C is incorrect as aldosterone regulates sodium levels, not acid-base balance. Choice D is also incorrect as renin is involved in regulating blood pressure, not acid-base balance.

2. When educating a client about to undergo a pacemaker insertion, the nurse explains the normal phases of cardiac muscle tissue. During the repolarization phase, the nurse will stress that membranes must be repolarized before they can be re-excited. Within the cell, the nurse understands that:

• A. Potassium channels open while sodium channels close, causing repolarization to the resting state.
• B. The influx of calcium is the primary stimulus for the repolarization of cardiac tissue.
• C. Only the electrical activity within the heart will determine when repolarization occurs.
• D. The cell membranes need to stay calm, resulting in muscle tissue becoming refractory.

Correct answer: A

Rationale: During the repolarization phase of cardiac muscle tissue, potassium channels open while sodium channels close. This process is crucial for the cardiac muscle to return to its resting state after depolarization. Potassium moving out of the cell and sodium staying out helps reset the membrane potential and prepare the cell for the next depolarization phase. The influx of calcium is not the primary stimulus for repolarization in cardiac tissue; it is mainly involved in the depolarization phase. While electrical activity within the heart influences repolarization, the specific ion movements described in choice A are what physiologically drive repolarization. Cell membranes need to be in an active state during repolarization, not calm, to facilitate the necessary ion movements for muscle tissue to properly function.

3. Which clients are at highest risk for pneumonia?

• A. Those in their 20s and 30s and generally healthy
• B. Those who exercise regularly and are not exposed to pathogens
• C. Those who are hospitalized and immunocompromised
• D. Those who have adequate respiratory function

Correct answer: C

Rationale: Clients who are hospitalized and immunocompromised are at the highest risk for pneumonia due to their weakened immune systems. Choice A is incorrect as young and healthy individuals typically have stronger immune systems. Choice B is incorrect because regular exercise can actually boost the immune system and reduce the risk of infections. Choice D is incorrect as having adequate respiratory function does not necessarily correlate with the risk of developing pneumonia.

4. A woman of childbearing age is diagnosed with breast cancer. She is currently taking hormonal contraceptives. What information should the woman be given regarding the hormonal contraceptives?

• A. The hormonal contraceptives do not affect the course of the disease.
• B. The hormonal contraceptives will stimulate uterine bleeding.
• C. The hormonal contraceptives will impair uterine bleeding.
• D. The hormonal contraceptives will stimulate tumor growth.

Correct answer: A

Rationale: The correct answer is A. Hormonal contraceptives should be discontinued in women diagnosed with breast cancer because they can potentially stimulate cancer growth. Choice B is incorrect as hormonal contraceptives do not stimulate uterine bleeding. Choice C is also incorrect as hormonal contraceptives typically do not impair uterine bleeding. Choice D is incorrect because hormonal contraceptives are not meant to stimulate tumor growth.

5. A patient is prescribed clomiphene citrate (Clomid) for the treatment of infertility. Which of the following statements should be included in the nurse's teaching?

• A. This drug induces ovulation by stimulating gonadotropins.
• B. This drug induces ovulation by inhibiting gonadotropins.
• C. This drug suppresses ovulation by inhibiting gonadotropins.
• D. This drug increases progesterone levels, which maintains pregnancy.

Correct answer: A

Rationale: The correct statement to include in the nurse's teaching is that clomiphene induces ovulation by stimulating the release of gonadotropins, which in turn stimulate the ovaries. Choice B is incorrect because clomiphene does not induce ovulation by inhibiting gonadotropins. Choice C is also incorrect as clomiphene does not suppress ovulation by inhibiting gonadotropins. Choice D is inaccurate as clomiphene does not directly increase progesterone levels to maintain pregnancy.

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