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During swallowing food, which structures moves downward to prevent food from entering the trachea?
Experiment
A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact, involving the manipulation of variables under controlled conditions.
Unethical
Actions or behaviors that are deemed wrong or unacceptable according to moral principles or societal standards.
Naturalistic Observation
An investigational approach where observers watch subjects in their inherent environments without any influence from the observer.
Survey Research
A method of gathering information from a sample of individuals through their responses to questions.
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