What is the primary function of the natural killer cell?
Producing early induced proteins
Promoting opsonization of bacteria cells
Secreting signaling molecules
Destroying virally infected cells
The Correct Answer is D
A. Producing early induced proteins: While natural killer cells can produce cytokines, their primary function is not related to protein production.
B. Promoting opsonization of bacteria cells: Opsonization is primarily performed by antibodies and complement proteins, rather than natural killer cells.
C. Secreting signaling molecules: While natural killer cells do secrete signaling molecules (cytokines) to communicate with other immune cells, their main role is the direct destruction of infected cells.
D. Destroying virally infected cells: The primary function of natural killer cells is to recognize and eliminate virally infected cells and tumor cells, contributing to the innate immune response.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Pharynx: The pharynx is a part of the throat, but the vocal folds are not located here.
B. Epiglottis: The epiglottis is a flap of tissue that prevents food from entering the trachea, but it is not where the vocal folds are located.
C. Trachea: The trachea is the windpipe, but the vocal folds are not present here.
D. Larynx: The vocal folds (or vocal cords) are located in the larynx (voice box), which is responsible for sound production.
Correct Answer is C, A, D, B
Explanation
- Deoxygenated blood from the body enters the right atrium, passes through the tricuspid valve into the right ventricle.
- From the right ventricle, blood moves through the pulmonary valve into the pulmonary arteries and goes to the lungs for oxygenation.
- Oxygenated blood returns to the left atrium and passes through the bicuspid (mitral) valve into the left ventricle.
- Finally, the left ventricle pumps oxygenated blood through the aortic valve into the aorta for distribution to the body.
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