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During maximal exercise,the skeletal muscles can receive as much as ____ of the total blood flow.
Ethical
Pertaining to or dealing with morals or the principles of morality; pertaining to right and wrong in conduct.
Natural Experiments
Research designs that involve observing the effects of naturally occurring variables or events, as opposed to manipulations made by the researcher.
Quasi-experiments
Research designs that attempt to establish cause-and-effect relationships but lack the element of random assignment to treatment or control groups.
External Validity
The extent to which the results of a study can be generalized or applied to contexts outside of the experimental conditions.
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