The answer to this question would be: <span>B. Receptor site
The receptor site of a neurotransmitter often only receives a specific kind of transmitter. That was because the receptor has a unique 3D structure, so different transmitter wouldn't fit into the receptor. That was similar to lock and key principles.</span>
Answer:
PE makes a person more active and energetic. This enhances the overall happiness and well-being of a person.
PE plays an important role as it teaches us how to be active all the time, mindfulness, daily body exercises, stress management etc.
PE is very essential for school students
Explanation:
