What is a structure of the inner ear?.
Tragus.
Cerumen.
Cochlea.
Helix.
.
The Correct Answer is C
The correct answer is Choice C. -
Choice A rationale:
The bicuspid valve, also known as the mitral valve, prevents backflow from the left ventricle to the left atrium. -
Choice B rationale:
The semilunar valves include the aortic and pulmonary valves, but neither prevents backflow into the right atrium. -
Choice C rationale:
The tricuspid valve prevents backflow from the right ventricle to the right atrium. -
Choice D rationale:
The aortic valve prevents backflow from the aorta to the left ventricle.
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 B
Explanation
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.
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