A staff member asks a nurse to describe foam cells. The nurse's best response is that foam cells are
lipid-laden mast cells that have a soap-like texture.
macrophages that engulf low-density lipoproteins (LDLs).
injured neutrophil clots.
deposited adipose cells.
The Correct Answer is B
Choice A reason: Lipid-laden mast cells are not foam cells. Mast cells are immune cells that release histamine and other inflammatory mediators. They do not accumulate lipids or have a soap-like texture.
Choice B reason: Macrophages that engulf low-density lipoproteins (LDLs) are foam cells. They are part of the atherosclerotic process that leads to plaque formation in the blood vessels. They are called foam cells because they have a foamy appearance under the microscope.
Choice C reason: Injured neutrophil clots are not foam cells. Neutrophils are immune cells that fight infection and form pus. They do not engulf LDLs or contribute to atherosclerosis.
Choice D reason: Deposited adipose cells are not foam cells. Adipose cells are fat cells that store energy and secrete hormones. They do not phagocytose LDLs or form plaques in the blood vessels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: This is not what will happen when a person is hypotensive. Baroreceptors are sensory receptors that detect changes in blood pressure. When a person is hypotensive, the baroreceptors are more active, not less, and they send signals to the brain to increase the blood pressure.
Choice B reason: This is what will happen when a person is hypotensive. SNS stands for sympathetic nervous system, which is the part of the autonomic nervous system that prepares the body for fight or flight response. When a person is hypotensive, the SNS is activated to increase the heart rate, contractility, and vasoconstriction, which all raise the blood pressure.
Choice C reason: This is not what will happen when a person is hypotensive. Person will be bradycardic means that the person will have a slow heart rate, usually below 60 beats per minute. When a person is hypotensive, the opposite will happen, as the heart rate will increase to compensate for the low blood pressure.
Choice D reason: This is not what will happen when a person is hypotensive. SNS is suppressed means that the sympathetic nervous system is inhibited or reduced in activity. When a person is hypotensive, the SNS is not suppressed, but rather stimulated, to increase the blood pressure.
Correct Answer is ["A","C","D","E"]
Explanation
Choice A reason: Use of accessory breathing muscles is a sign of respiratory distress and increased work of breathing. Accessory muscles are the muscles of the neck, chest, and abdomen that assist the diaphragm and intercostal muscles in breathing. They are normally not used for breathing, but they are recruited when the airway is obstructed or the lung function is impaired.
Choice B reason: Foul-smelling sputum is not a sign of an acute asthma episode. It is a sign of a bacterial infection or a lung abscess. Sputum is the mucus that is coughed up from the lungs. It can have different colors, textures, and odors depending on the cause and severity of the condition.
Choice C reason: Feeling of chest tightness is a sign of an acute asthma episode. It is caused by the bronchoconstriction, or the narrowing of the airways, that occurs during an asthma attack. It can also be accompanied by pain or pressure in the chest.
Choice D reason: Coughing is a sign of an acute asthma episode. It is a reflex action that tries to clear the airways of mucus, irritants, or foreign particles. It can also be triggered by the inflammation and hypersensitivity of the airways that occur during an asthma attack.
Choice E reason: Expiratory wheezing is a sign of an acute asthma episode. It is a high-pitched whistling sound that is heard when the person exhales. It is caused by the turbulent flow of air through the narrowed airways. It can also be heard on inspiration, but it is more prominent on expiration.
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