The target cell concept is illustrated in the picture.Label the cells as either target cells or non-target cells by identifying A and B as such.Explain your answer. 
Definitions:
Operational Definition
A statement of the procedures and ways in which a research variable is measured and defined.
Muscle Tension
The condition in which muscles of the body remain semi-contracted for an extended period, which may be a response to stress or physical exertion.
Anxiety
An emotion characterized by feelings of tension, worried thoughts, and physical changes like increased blood pressure.
Loud Noise
Sounds that are of high amplitude, potentially harmful or disturbing to human hearing.
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