HESI RN
Biology Practice Test
1. Which of the following is responsible for the synthesis of carbohydrates, lipids, and steroid hormones?
- A. Smooth endoplasmic reticulum (ER)
- B. Rough endoplasmic reticulum (ER)
- C. Golgi apparatus
- D. Ribosomes
Correct answer: A
Rationale: The smooth endoplasmic reticulum (ER) is the correct answer. It is responsible for the synthesis of lipids, including steroids, and also plays a role in carbohydrate metabolism. The rough endoplasmic reticulum (ER) is involved in protein synthesis and processing, not lipid or carbohydrate synthesis. The Golgi apparatus is responsible for modifying, sorting, and packaging of proteins and lipids, but not for their synthesis. Ribosomes are the cellular organelles responsible for protein synthesis, not lipid or carbohydrate synthesis.
2. How should the nurse interpret the following arterial blood gas results for a patient who had a tracheostomy placed after a motor vehicle crash: pH 7.48, PaO2 85 mm Hg, PaCO2 32 mm Hg, and HCO3 25 mEq/L?
- A. Metabolic acidosis
- B. Metabolic alkalosis
- C. Respiratory acidosis
- D. Respiratory alkalosis
Correct answer: D
Rationale: The patient's pH of 7.48 indicates alkalosis, and the low PaCO2 of 32 mm Hg suggests a respiratory cause. The HCO3 level is normal, ruling out metabolic causes. Therefore, the correct interpretation is respiratory alkalosis. Options A, B, and C are incorrect as they do not align with the pH and PaCO2 values provided.
3. A client has a long history of hypertension. Which category of medication would the nurse expect to be ordered to avoid chronic kidney disease (CKD)?
- A. Antibiotic
- B. Histamine blocker
- C. Bronchodilator
- D. Angiotensin-converting enzyme (ACE) inhibitor
Correct answer: D
Rationale: The correct answer is D, Angiotensin-converting enzyme (ACE) inhibitor. ACE inhibitors inhibit the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. By blocking this conversion, ACE inhibitors promote vasodilation and improve perfusion to the kidneys. Additionally, ACE inhibitors block the breakdown of bradykinin and prostaglandin, further contributing to vasodilation. They also lead to increased renin and decreased aldosterone levels. These effects help in reducing blood pressure and protecting the kidneys in clients with hypertension. Antibiotics are used to fight infections, histamine blockers reduce inflammation, and bronchodilators widen the bronchi, none of which address the underlying processes involved in slowing the progression of chronic kidney disease (CKD) in hypertensive clients.
4. A 17-year-old unmarried, pregnant client with drug addiction is a high school dropout, homeless, and has a history of past abuse arrives at the clinic for her first prenatal visit. Which findings should the nurse document as health risk factors for the client? (Select all that apply)
- A. age
- B. school dropout
- C. drug addiction
- D. All of the above
Correct answer: D
Rationale: All these factors - age, school dropout, drug addiction - are significant health risk factors for the client. Being young, a high school dropout, and struggling with drug addiction can lead to various complications during pregnancy, such as poor prenatal outcomes and social challenges. These factors can impact the client's overall health and well-being, highlighting the importance of addressing them during prenatal care.
5. A client has a nursing diagnosis of Altered sleep patterns related to nocturia. Which client instruction is important for the nurse to provide?
- A. Decrease intake of fluids after the evening meal.
- B. Drink a glass of cranberry juice every day.
- C. Drink a glass of warm decaffeinated beverage at bedtime.
- D. Consult the healthcare provider about a sleeping pill.
Correct answer: A
Rationale: The correct instruction for the nurse to provide is to advise the client to decrease intake of fluids after the evening meal. By reducing fluid intake before bedtime, the client can minimize the need to void during the night, which can help improve sleep patterns affected by nocturia. Choices B, C, and D are incorrect. Drinking cranberry juice or warm decaffeinated beverage at bedtime may increase fluid intake, exacerbating the nocturia issue. Consulting the healthcare provider about a sleeping pill should not be the first intervention, as it is important to try non-pharmacological approaches first.