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>
Entry-level jobs give the experience needed to gain a higher level job, and also helps those who are in higher levels jobs, successfully complete their jobs, because they do not have to complete the tasks assigned to those with lower-level jobs.
Answer:
South Africa
Explanation:
7.7 Million people with HIV in South Africa
