The nurse is caring for a client at risk for a respiratory infection.
Which of the following natural respiratory defense mechanisms help defend against infection? (Select all that apply).
Cilia lining the respiratory tract sweep debris upward in mucus to be swallowed.
The respiratory tract cools and dries the air being inhaled.
Cells in the respiratory tract secrete lysozymes that can destroy certain bacteria.
Macrophages engulf and destroy bacteria found in the alveoli.
High concentration of oxygen and carbon dioxide aid the defense mechanisms.
Correct Answer : A,C,D
These are natural respiratory defense mechanisms that help defend against infection.
Choice A is correct because cilia lining the respiratory tract sweep debris upward in mucus to be swallowed.
This prevents pathogens and particles from reaching the lungs.
Choice B is wrong because the respiratory tract does not cool and dry the air being inhaled. In fact, the respiratory tract warms and humidifies the air to facilitate gas exchange.
Choice C is correct because cells in the respiratory tract secrete lysozymes that can destroy certain bacteria.
Lysozymes are enzymes that break down the cell walls of bacteria.
Choice D is correct because macrophages engulf and destroy bacteria found in the alveoli. Macrophages are a type of white blood cell that act as scavengers of foreign invaders.
Choice E is wrong because high concentrations of oxygen and carbon dioxide do not aid the defense mechanisms.
On the contrary, high levels of these gases can impair gas exchange and cause acid-base imbalance.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The nurse should obtain a sputum culture specimen before administering any antibiotics to the client with bacterial pneumonia.
This is because the sputum culture can help identify the causative organism and the appropriate antibiotic therapy.
Administering antibiotics before obtaining the sputum culture can alter the results and lead to ineffective treatment.
Choice B is wrong because azithromycin is an antibiotic that should be given after obtaining the sputum culture.
Choice C is wrong because coughing and deep breathing are important interventions to promote airway clearance and gas exchange, but they are not the priority actions for this client.
Choice D is wrong because offering clear liquids can help prevent dehydration and thin secretions, but they are not the most urgent action for this client.
Normal ranges for blood urea nitrogen (BUN) are 7 to 20 mg/dL and for creatinine are 0.6 to
1.2 mg/dL.
Elevated levels of these substances can indicate renal impairment, which can be a complication of bacterial pneumonia.
The nurse should monitor these levels and report any abnormalities to the health care provider.
Correct Answer is D
Explanation
This is because a client who has been diaphoretic for the past six hours is likely to have wet and uncomfortable bed linens that can cause skin breakdown and infection. Changing the bed linens frequently can help keep the client dry and comfortable.
Choice A is wrong because offering the client a bedpan every three hours is not related to diaphoresis and may not meet the client’s elimination needs.
Choice B is wrong because keeping an emesis basin near the bedside is not related to diaphoresis and may not be necessary unless the client has nausea or vomiting.
Choice C is wrong because providing oral care every four hours is not enough to prevent dehydration and dry mouth in a client who has been diaphoretic for the past six hours. The client may need more frequent oral care and fluid intake.
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