The Beginning of a True Capillary Is Surrounded by a Precapillary

question 83

Multiple Choice

The beginning of a true capillary is surrounded by a precapillary sphincter. The opening and closing of precapillary sphincters is controlled by__________ .

• A) parasympathetic nervous system
• B) local chemical conditions
• C) sympathetic nervous system
• D) blood pressure in the metarteriole

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Definitions:

Extended Period

A length of time that is longer than average or expected, often used in the context of research to indicate the duration of a study or observation.

Independent Variable

A factor in scientific research that is intentionally changed to examine its impact on a dependent outcome.

Selection Bias

A distortion in a statistical analysis resulting from the method of collecting samples, where some members of the intended population are less likely to be included than others.

Natural Groups

Groups that exist in the real world as they are, without manipulation or creation for research purposes, such as ethnic or gender groups.