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 B
Explanation
Inspection, palpation, percussion, and auscultation are the four techniques used to perform a physical assessment.
Inspection involves observing the patient’s appearance, posture, movement, and behavior. Palpation involves feeling the patient’s skin, organs and pulses with the hands.
Percussion involves tapping the patient’s body with the fingers or a small hammer to elicit sounds or vibrations.
Auscultation involves listening to the patient’s heart, lungs, and bowel sounds with a stethoscope.
Choice A is wrong because relationship and evaluation are not techniques of physical assessment.
Relationship refers to the rapport and trust established between the nurse and the patient.
Evaluation refers to the process of comparing the expected outcomes with the actual outcomes of the nursing interventions.
Choice C is wrong because vital signs, health history, general survey, and height and weight are not techniques of physical assessment.
They are components of a health assessment, which is a broader term that includes physical assessment as well as other aspects of the patient’s health status.
Choice D is wrong because color is not a technique of physical assessment.
Color is an aspect of inspection, which is one of the techniques of physical assessment.
Correct Answer is C
Explanation
The popliteal artery is a major blood vessel that runs behind the knee and supplies blood to the lower leg. Sitting with knees crossed can compress this artery and reduce blood flow to the leg.
This can cause numbness, tingling, or pain in the leg. It can also increase the risk of blood clots or varicose veins.
Choice A is wrong because sitting with knees crossed does not decrease the risk of skin breakdown behind the knee. In fact, it may increase the risk by causing friction or pressure on the skin.
Choice B is wrong because sitting with knees crossed does not eliminate the pain of arthritis in the lower legs.
Arthritis is a joint inflammation that causes pain, stiffness, and swelling. Sitting with knees crossed can worsen these symptoms by putting more stress on the knee joints.
Choice D is wrong because sitting with knees crossed does not avoid irritation of the knee joints.
On the contrary, it can cause irritation by overstretching the knee ligaments and muscles
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