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.
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Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Veins do not always carry deoxygenated blood. The pulmonary veins are an exception as they carry oxygenated blood from the lungs to the heart.
Choice B rationale:
Veins do not carry blood away from the heart. They carry blood back toward the heart.
Choice C rationale:
Veins do not have a thick tunica media. The tunica media is thinner in veins than in arteries.
Choice D rationale:
Veins have valves. This is a true statement. The valves in veins prevent blood from flowing backward.
Correct Answer is C
Explanation
Choice A rationale:
Humoral immunity involves the production of antibodies by B cells, not the destruction of pathogens within a cell17.
Choice B rationale:
Non-specific immunity refers to innate immune responses that occur regardless of the nature of the pathogen17.
Choice C rationale:
Cellular immunity involves cytotoxic T cells recognizing and destroying infected cells17.
Choice D rationale:
Passive immunity involves the transfer of antibodies from one individual to another, not the destruction of pathogens within a cell17.
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