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This Image Shows the Structure of a Hair and Its

question 18

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This image shows the structure of a hair and its follicle.What does "1" represent?


Definitions:

Endorphin

Neurotransmitters found in the brain that bind to opiate receptors and produce a feeling of pain relief and well-being.

Neurotransmitters

Chemical messengers that transmit signals across synapses from one neuron to another in the nervous system.

Brain Damaged

A condition resulting from injury or illness that affects the brain, potentially leading to impairments in cognitive, physical, emotional, or behavioral functioning.

Surgical Lesions

Deliberate injuries created by surgery to remove or alter parts of the body or brain, often to treat medical conditions.

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