Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus?
Oropharynx
Nasopharynx
Larynx
Mouth
The Correct Answer is C
A. Oropharynx: The oropharynx is the middle part of the throat behind the mouth. It is the primary pathway food must travel through to reach the esophagus; therefore, it cannot be blocked during swallowing.
B. Nasopharynx: This must be blocked by the soft palate and uvula to prevent food and liquids from entering the nasal cavity.
C. Larynx: The larynx must be blocked by the epiglottis to prevent food from entering the "windpipe" and causing choking.
D. Mouth: The tongue blocks the front of the mouth during the "oral stage" of swallowing to ensure food moves backward into the throat rather than forward out of the lips.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. leukocytosis: This refers to an abnormally high white blood cell count, often indicating infection.
B. leukopenia: The suffix "-penia" means deficiency or poverty. Leukopenia is a decrease in the number of white blood cells.
C. differential white blood cell count: This is a lab test that counts the percentage of each specific type of white blood cell (neutrophils, lymphocytes, etc.).
D. hemostasis: This is the physiological process that stops bleeding.
Correct Answer is D
Explanation
A. dialysis: This is the separation of smaller particles from larger ones through a membrane, usually driven by concentration, not just hydrostatic pressure.
B. osmosis: This is the movement of water driven by a concentration gradient of solutes, not hydrostatic pressure.
C. diffusion: This is the movement of particles from high to low concentration.
D. filtration: Filtration is the process where hydrostatic pressure (like blood pressure) forces water and small solutes through a membrane or capillary wall.
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