Which gas is the primary regulator of respiration?.
Nitrogen.
Carbon dioxide.
Oxygen.
Bicarbonate.
The Correct Answer is B
The correct answer is Choice B.
Choice A rationale:
Nitrogen is the most abundant gas in the atmosphere, but it is not the primary regulator of respiration.
Choice B rationale:
Carbon dioxide (CO2) is the main chemical regulator of respiration and the potent stimulus of the respiratory centers via the arterial chemoreceptors and directly on the central chemoreceptors.
Choice C rationale:
Oxygen is essential for cellular respiration, but it is not the primary regulator of respiration.
Choice D rationale:
Bicarbonate plays a role in maintaining the pH balance in the blood and is not the primary regulator of respiration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Neutrophils are a type of white blood cell that can ingest pathogens, but they are not the primary cells responsible for this task.
Choice B rationale:
Phagocytes is a general term for cells that can ingest pathogens and cellular debris. Macrophages and neutrophils are types of phagocytes.
Choice C rationale:
Basophils are a type of white blood cell, but their primary role is not to ingest pathogens. They are involved in allergic reactions and inflammation.
Choice D rationale:
Macrophages are the primary cells that ingest pathogens and cellular debris. They are a type of phagocyte.
Correct Answer is A
Explanation
Choice A rationale:
Abdominal thrusts, also known as the Heimlich maneuver, are a first-aid technique used to treat conscious choking victims in which the rescuer delivers thrusts to a patient’s upper abdominal region. This motion pushes air from the lungs up through the throat to dislodge foreign objects and treat upper airway obstructions.
Choice B rationale:
Chest thrusts can also be used if needed. However, they are not the primary method for dislodging a foreign object in someone that is choking.
Choice C rationale:
Chest pumps are not a recognized method for dislodging a foreign object in someone that is choking.
Choice D rationale:
Bowel thrusts are not a recognized method for dislodging a foreign object in someone that is choking.
So, the correct answer is Choice A.
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