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 D
Explanation
This is because the nurse should always follow the ABC (airway, breathing, circulation) priority when dealing with a client who suddenly slumps over. The nurse should check if the client is conscious and breathing before calling for help or moving the client.
Choice A is wrong because calling the rapid response team should not be done before assessing the client’s condition and ensuring a patent airway.
Choice B is wrong because moving the client to the bed may cause further harm or aspiration if the client has food in the mouth or airway.
Choice C is wrong because calling the primary care provider is not a priority action in this situation. The nurse should first assess and stabilize the client before notifying the provider.
Correct Answer is D
Explanation
Use them only as a last resort after attempting alternatives and get an order to do so. This is because restraints are used to protect persons from harming themselves or others, but they can also cause injuries, falls, and death. Therefore, they should be used only when less restrictive measures fail to protect the person or others, and only with informed consent and a doctor’s order.
Choice A is wrong because restraints should not be secured to the bed rails, but to the movable part of the bed frame out of the person’s reach.
This prevents the person from getting entangled or injured by the restraints.
Choice B is wrong because restraints should not be used for staff convenience or to control or prevent a behavior. They should be used only for the immediate physical safety of the person or others.
Choice C is wrong because restraints should not be applied to clients who have a history of violence or a previous fall for everyone’s protection. They should be used only when there is a clear and present danger of harm to the person or others.
Normal ranges for restraints are:
- Check the person at least every 15 minutes
- Remove restraints and meet basic needs at least every 2 hours
- Apply restraints so that they are snug but allow enough room to fit one finger between the restraint and the wrist
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