preload refers to
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Nursing Elites

NCLEX-RN

NCLEX RN Exam Prep

1. What does preload refer to?

Correct answer: B

Rationale: Preload refers to the volume of blood that enters the right side of the heart. This volume stretches the fibers in the heart before contraction. Preload is an essential factor in determining the force of ventricular contraction. Choices A, C, and D are incorrect. Choice A is incorrect because preload is specifically related to the volume of blood entering the right side of the heart. Choices C and D are incorrect as they refer to afterload, which is the pressure that the heart must overcome to pump blood out of the ventricles into the systemic or pulmonary circulation.

2. What term is used to describe the sexual response changes among middle-aged men?

Correct answer: B

Rationale: The correct answer is 'Climacteric.' Climacteric specifically refers to the period in middle-aged men characterized by sexual response changes, such as delayed arousal. Menopause, choice A, is incorrect as it is specific to women and marks the cessation of menstrual periods. Generativity, choice C, is unrelated as it refers to the concern for guiding the next generation. Maturity, choice D, is too broad and generally refers to reaching the adult stage of development, not specifically addressing sexual response changes in middle-aged men.

3. The nurse is conducting a health fair for older adults. Which statement is true regarding vital sign measurements in aging adults?

Correct answer: B

Rationale: Aging causes a decrease in vital capacity and decreased inspiratory reserve volume. As a result, the examiner may observe a shallower inspiratory phase and an increased respiratory rate in older adults. Contrary to common belief, the increased rigidity of arterial walls actually makes the pulse easier to palpate in aging adults. Pulse pressure is widened, not decreased, due to changes in systolic and diastolic blood pressures. Furthermore, changes in the body's temperature regulatory mechanism make older individuals less likely to develop a fever but more susceptible to hypothermia.

4. When counting an infant's respirations, which technique is correct?

Correct answer: B

Rationale: The correct technique for counting an infant's respirations is to observe the movement of the abdomen. Infants typically have more diaphragmatic breathing than thoracic, so watching the abdomen provides a more accurate count. Placing a hand on the chest or listening with a stethoscope can alter the infant's breathing pattern and provide inaccurate results. Therefore, options A, C, and D are incorrect methods for counting an infant's respirations. By observing the movement of the abdomen, healthcare providers can accurately assess an infant's respiratory rate without influencing their breathing pattern.

5. A physician has ordered that a client must be placed in a high Fowler's position. How does the nurse position this client?

Correct answer: D

Rationale: A high Fowler's position is a modification of the semi-Fowler's position, in which the client is seated with arms resting at the sides or in the lap. The high Fowler's position requires that the client's head and upper chest are elevated, and the backrest is at a 90-degree angle. This position supports breathing and appropriate chest wall movement, making it easier for the client to breathe. Choices A, B, and C are incorrect because a high Fowler's position involves the client being in a sitting position with the backrest at a 90-degree angle, not being face-down, lying with the head lower than the feet, or lying on the back with knees drawn up towards the chest.

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