The nurse is caring for a client who suffered a stroke 3 days ago and is assessing the client's state of arousal.
The nurse knows that the part of the body responsible for a person being alert or aroused is the
adrenal glands.
renin-angiotensin-aldosterone system.
cranial nerves.
reticular activating system.
The Correct Answer is D
Choice A rationale
The adrenal glands primarily produce hormones that regulate metabolism, immune system, blood pressure, stress response, and other essential functions. While these hormones are crucial for overall bodily function and indirectly influence alertness and arousal, they are not the primary neurological structures responsible for maintaining a conscious and aroused state.
Choice B rationale
The renin-angiotensin-aldosterone system (RAAS) is a hormonal system that regulates blood pressure and fluid balance. While changes in blood pressure and fluid balance can affect overall well-being and indirectly influence alertness, the RAAS is not the neurological center responsible for a person's state of arousal.
Choice C rationale
Cranial nerves are a set of twelve paired nerves that emerge directly from the brain. They are responsible for a wide range of sensory and motor functions, including vision, hearing, taste, smell, facial movements, and swallowing. While some cranial nerves contribute to sensory input that can influence alertness, they are not the central structure responsible for maintaining arousal itself.
Choice D rationale
The reticular activating system (RAS) is a network of neurons located in the brainstem that plays a crucial role in regulating wakefulness, alertness, and the sleep-wake cycle. It filters incoming sensory information and relays important signals to the cerebral cortex, maintaining a state of arousal and consciousness. Damage to the RAS, such as that which can occur following a stroke, can lead to altered levels of consciousness. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
The amount of stage 4 (deep, slow-wave) sleep actually decreases as individuals age. Older adults tend to have less deep sleep and more fragmented sleep patterns with increased awakenings.
Choice B rationale
Circadian rhythms, the body's internal clock regulating sleep-wake cycles, tend to become less prominent or more easily disrupted as clients age. This can lead to changes in sleep timing, such as earlier bedtimes and wake times.
Choice C rationale
Older clients typically take longer to fall asleep (increased sleep latency) compared to younger individuals due to various physiological and environmental factors.
Choice D rationale
Total sleep time generally decreases with age. Older adults often require and obtain less sleep per night compared to younger adults. This is a normal physiological change associated with aging.
Correct Answer is B
Explanation
Choice A rationale
Sexually Transmitted Infections (STIs) primarily affect the reproductive system and do not directly cause abnormalities in PaCO2 levels. PaCO2 reflects the partial pressure of carbon dioxide in arterial blood, which is a key indicator of respiratory function and acid-base balance.
Choice B rationale
Chronic Obstructive Pulmonary Disease (COPD) is a group of lung diseases that obstruct airflow, leading to impaired gas exchange. This impaired exchange often results in the retention of carbon dioxide, causing an elevated PaCO2 level on an ABG report, indicating respiratory acidosis.
Choice C rationale
Congestive Heart Failure (CHF) primarily affects the cardiovascular system, leading to fluid overload and potential pulmonary congestion. While severe CHF can indirectly affect gas exchange, the most direct and common cause of abnormal PaCO2 is a respiratory issue like COPD.
Choice D rationale
Chronic Renal Insufficiency or Failure (CRF) primarily affects the kidneys' ability to regulate electrolytes and waste products. While CRF can lead to metabolic acidosis, which can trigger respiratory compensation (altering PaCO2), it is not the most direct or likely cause of an abnormal PaCO2 level on an ABG report.
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