HESI RN
Biology Test
1. During which stage of mitosis does the nuclear envelope begin to disappear and the chromosomes start attaching to the spindle forming along the cell's axis?
- A. Prometaphase
- B. Metaphase
- C. Anaphase
- D. Prophase
Correct answer: A
Rationale: The correct answer is A, Prometaphase. During prometaphase, the nuclear envelope disintegrates, and chromosomes start attaching to spindle fibers. In metaphase, chromosomes align in the middle of the cell. Anaphase is characterized by the separation of sister chromatids, and prophase involves the condensation of chromosomes and the beginning of spindle formation.
2. A client with heart failure has a prescription for digoxin. The nurse is aware that sufficient potassium should be included in the diet because hypokalemia in combination with this medication:
- A. Can predispose to dysrhythmias
- B. May lead to oliguria
- C. May cause irritability and anxiety
- D. Sometimes alters consciousness
Correct answer: A
Rationale: The correct answer is A: Hypokalemia increases the risk of dysrhythmias when taking digoxin, making potassium intake crucial. Digoxin toxicity is more likely in patients with low potassium levels, leading to an increased risk of dysrhythmias. Choices B, C, and D are incorrect because hypokalemia in combination with digoxin is primarily associated with dysrhythmias rather than oliguria, irritability, anxiety, or alteration of consciousness.
3. A client with diabetes mellitus presents with a blood sugar level of 320 mg/dL. What is the nurse's initial action?
- A. Administer sliding scale insulin as prescribed
- B. Encourage the client to drink fluids
- C. Provide the client with a carbohydrate snack
- D. Assess the client for signs of hypoglycemia
Correct answer: A
Rationale: When a client with diabetes mellitus presents with a high blood sugar level of 320 mg/dL, the nurse's initial action should be to administer sliding scale insulin as prescribed. The priority is to bring down the elevated glucose level promptly to prevent further complications. Encouraging the client to drink fluids or providing a carbohydrate snack would not effectively address the elevated blood sugar level in this scenario. Assessing for signs of hypoglycemia is not appropriate as the client's blood sugar level is high, not low.
4. A healthcare professional is preparing to care for a client with a potassium deficit. The healthcare professional reviews the client's record and determines that the client was at risk for developing the potassium deficit because the client:
- A. Has renal failure.
- B. Requires nasogastric suction.
- C. Has a history of Addison's disease.
- D. Is taking a potassium-sparing diuretic.
Correct answer: B
Rationale: Nasogastric suction can lead to significant potassium loss due to the continuous drainage of gastric contents, increasing the risk of a potassium deficit. Choices A, C, and D do not directly result in the significant loss of potassium. Renal failure may lead to potassium retention rather than a deficit. Addison's disease is associated with adrenal insufficiency, not potassium depletion. Potassium-sparing diuretics, as the name suggests, typically help retain potassium rather than cause a deficit.
5. The follicular phase is to the __________ as the luteal phase is to the secretory phase.
- A. Postovulatory
- B. Menstrual
- C. Proliferative
- D. Ovulatory
Correct answer: C
Rationale: The correct answer is C: Proliferative. The follicular phase corresponds to the proliferative phase during the menstrual cycle, characterized by the development of ovarian follicles. The luteal phase, on the other hand, corresponds to the secretory phase when the endometrium prepares for implantation. Choices A, B, and D are incorrect because they do not accurately reflect the phases being compared in the question.