Define the following terms: Purpose- Research- Avoiding Bias- Hypothesis- Experiment- Independent Variable- Dependent Variable- Control- Analysis- Conclusion-

Purpose research is the statement or sentences that describe the main reason or why the study is been conducted or why the research is been conducted.

Avoiding bias refers to the act the authors avoid using language that are biased or not factual

Explanation:

Purpose research is the statement or sentences that describe the main reason or why the study is been conducted or why the research is been conducted. It states the goal of the study .

Avoiding bias refers to the act the authors avoid using language that are biased or not factual information that portray the evidence.

Hypothesis experiment refers to information or explanation that is supplied which can be tested to be truth or falsifiable.

Independent variable is a variable that can stand alone and it's variation does not depend on another but the experimenter can control or change it in an experiment.

Dependent variable is a variable that cannot stand alone but depends on independent variable in an experiment.

Control analysis refers to analysis that supply information about the output, the approaches or method used.

Conclusion refers to the final statements or words to finish a discussion or experimental study.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: