in meiosis the chromosome number is reduced from
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Nursing Elites

HESI RN

Biology Practice Test

1. In meiosis, the chromosome number is reduced from:

Correct answer: A

Rationale: The correct answer is A: "46 to 23." In meiosis, the chromosome number is reduced by half to form gametes for sexual reproduction. In humans, where the diploid chromosome number is 46, meiosis results in haploid cells with 23 chromosomes. Choices B, C, and D are incorrect because they do not represent the correct reduction in chromosome number during meiosis.

2. A client is receiving morphine for postoperative pain. What is the nurse's priority assessment?

Correct answer: A

Rationale: The correct answer is to monitor the client's respiratory rate. Morphine can cause respiratory depression, so assessing the respiratory rate is crucial to detect this potential side effect early. Monitoring the client's level of consciousness (Choice B) is important but comes after ensuring adequate breathing. Assessing the client's pain level (Choice C) is essential but not the priority when dealing with the side effects of morphine. Monitoring the client's blood pressure (Choice D) is also important but not the priority assessment when the focus is on respiratory depression.

3. The nurse is reviewing a client's electrocardiogram and determines the PR interval (PRI) is prolonged. What does this finding indicate?

Correct answer: C

Rationale: When the PR interval is prolonged, it signifies an increased conduction time from the SA node through the AV junction. This finding is characteristic of a first-degree heart block where there is a delay in the electrical conduction at the level of the AV node. Choices A, B, and D are incorrect as they do not accurately reflect the significance of a prolonged PR interval.

4. The nurse assesses a client with advanced cirrhosis of the liver for signs of hepatic encephalopathy. Which finding would the nurse consider an indication of progressive hepatic encephalopathy?

Correct answer: D

Rationale: Difficulty in handwriting is a common early sign of hepatic encephalopathy. Changes in handwriting can indicate progression or reversal of hepatic encephalopathy leading to coma. Choice (A) is a sign of ascites, not hepatic encephalopathy. Hypertension and a bounding pulse (Choice B) are not typically associated with hepatic encephalopathy. Decreased bowel sounds (Choice C) do not directly indicate an increase in serum ammonia level, which is the primary cause of hepatic encephalopathy.

5. The nurse finds a 6-month-old infant unresponsive and calls for help. After opening the airway and finding the XXXX, the infant is still not breathing. What action should the nurse take next?

Correct answer: C

Rationale: In a scenario where a 6-month-old infant is unresponsive and not breathing after the airway is open, giving two breaths that make the chest rise is the appropriate action. This helps deliver oxygen to the infant's lungs and can help initiate breathing. Chest compressions are not recommended for infants as the first step in resuscitation. Checking pulses like the femoral or carotid pulse is not the priority when an infant is not breathing, as providing oxygen through breaths is essential.

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