Nokea
Breathing rate is more rapid when the ...... area is more active
- A. Apneustic
- B. pneumotaxic
- C. medullary rhythmicity
- D. none
Correct Answer: B
Rationale: The correct answer is B: pneumotaxic. The pneumotaxic area is located in the pons and regulates the rate and depth of breathing by inhibiting the inspiratory area in the medulla. When the pneumotaxic area is more active, it limits the duration of inspiratory bursts, causing a more rapid breathing rate.
A: Apneustic area is located in the lower pons and promotes prolonged inspiration, leading to slower breathing rate.
C: Medullary rhythmicity is responsible for setting the basic rhythm of breathing, not directly affecting breathing rate.
D: None is incorrect as there is a specific brain area, pneumotaxic, that influences breathing rate.
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A 68-year-old male is being admitted to the hospital for an exacerbation of his COPD. The nurse is developing his plan of care. The nurse can expect that this client will?
- A. Be placed on 10 L of oxygen per nasal cannula.
- B. Be placed in respiratory isolation.
- C. Require frequent rest periods throughout the day.
- D. Be placed on fluid restriction.
Correct Answer: C
Rationale: The correct answer is C: Require frequent rest periods throughout the day. This is because patients with COPD often experience shortness of breath and fatigue, necessitating frequent rest periods to conserve energy and manage symptoms. Oxygen therapy is typically started at a lower flow rate (2-4 L/min) to avoid suppressing the patient's respiratory drive, so option A is not appropriate. Respiratory isolation is unnecessary for COPD exacerbation, as it is not a contagious condition, making option B incorrect. Fluid restriction is not typically indicated for COPD exacerbation unless the patient has comorbid conditions like heart failure, so option D is not the priority.
When does oxyhemoglobin form during respiration?
- A. during external respiration
- B. immediately after carbon dioxide enters the blood
- C. when the chloride shift occurs
- D. during pulmonary ventilation
Correct Answer: A
Rationale: The correct answer is A, during external respiration. Oxyhemoglobin forms when oxygen binds to hemoglobin in the lungs during external respiration. This process occurs in the alveoli where oxygen diffuses from the air sacs into the blood, binding with hemoglobin to form oxyhemoglobin. Choices B, C, and D are incorrect because oxyhemoglobin formation specifically happens during external respiration, not immediately after carbon dioxide enters the blood, when the chloride shift occurs, or during pulmonary ventilation. These processes are important in respiration but do not directly involve the formation of oxyhemoglobin.
Which intervention for airway management should you delegate to the nursing assistant?
- A. Assist client to sit up on side of bed.
- B. Instruct client to cough effectively.
- C. Teach client to use incentive spirometry.
- D. Auscultate breath sounds every 4 hours.
Correct Answer: A
Rationale: The correct answer is A. Assisting the client to sit up is a basic intervention suitable for a nursing assistant. Instructing effective coughing (B) and teaching incentive spirometry (C) require more skill. Auscultating breath sounds (D) is outside the scope of practice for a nursing assistant.
A client is found to be allergic to Chinese food, which causes acute asthma. Which of the following instructions should the nurse give the client?
- A. "Only eat Chinese food once a month."
- B. "Use your inhalers before eating Chinese food."
- C. "Avoid Chinese food because this is a trigger for you."
- D. "Determine other causes, because Chinese food wouldn't cause such a violent reaction."
Correct Answer: C
Rationale: Rationale: Choice C is correct because avoiding Chinese food, a known trigger for the client's acute asthma, is crucial to prevent future asthma attacks. By eliminating the trigger, the client can reduce the risk of allergic reactions and asthma exacerbations.
Summary:
A: Incorrect. Eating Chinese food once a month still exposes the client to the trigger, increasing the risk of asthma attacks.
B: Incorrect. Using inhalers before eating Chinese food may help manage symptoms temporarily but does not address the root cause of the allergic reaction.
D: Incorrect. Dismissing the client's known trigger without further investigation can lead to serious health consequences.
The most abundant gas in the earth's atmosphere is
- A. oxygen.
- B. water vapor
- C. argon.
- D. nitrogen.
Correct Answer: D
Rationale: The correct answer is D: nitrogen. Nitrogen makes up about 78% of the Earth's atmosphere, making it the most abundant gas. This is due to the fact that nitrogen is a chemically stable element that forms diatomic molecules (N2) which are not easily broken down. Oxygen (A) makes up about 21% of the atmosphere, while water vapor (B) and argon (C) are present in much smaller quantities. Therefore, nitrogen is the most abundant gas in the Earth's atmosphere based on its high percentage composition.