The Purpose of the Rubber Sheath on a Multisample Needle

question 12

Multiple Choice

The purpose of the rubber sheath on a multisample needle is to:

• A) protect the phlebotomist from accidental puncture
• B) prevent contamination of the blood sample
• C) facilitate puncture of the stopper
• D) prevent leakage of blood when tubes are changed

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Definitions:

Research Method

A systematic approach to conducting research that involves collecting data, analyzing information, and presenting findings.

Infer

To deduce or conclude information from evidence and reasoning rather than from explicit statements.

Extraneous Variables

Extraneous variables are those that are not the focus of a study but may influence its outcome, potentially confounding the results if not controlled.

Random Assignment

A procedure in experimental design that ensures every participant has an equal chance of being assigned to any group, enhancing the validity of results.