Answer:
Adenosine.
Explanation:
Adenosine is a neurotransmitter that is created in the brain and when it binds to the adenosine receptors, it slows down nerve activity and it creates a sensation of drowsiness.
<u>Caffeine</u> looks like adenosine to the receptors, therefore, when we have caffeine, <u>it binds to these receptors and there is no room left for the adenosine to bind</u>. However, the caffeine doesn't slow down nerve activity but, in the contrary, it speeds it up.
Therefore we can tell that caffeine blocks the receptors for the adenosine thus promoting wakefulness.
<span>The 3 types are - sensory </span>neurons<span>, motor </span>neurons<span>, and interneurons.
</span>
Sensory neurons<span> are nerve cells within the nervous system responsible for converting external stimuli from the organism's environment into internal electrical impulses
</span>
A motor neuron is a nerve cell<span> whose cell body is located in the spinal cord and whose fiber projects outside the spinal cord to directly or indirectly control effector organs, mainly muscles and glands.
</span>
Interneurons<span> create neural circuits, enabling communication between sensory or motor neurons and the central nervous system.</span>
Club Drugs (LSD) (Ecstasy)
Cause Rapid Heartbeat which can lead to death and are often used in crowded hot places causing rapid dehydration which can also lead to death
Bath Salts is a Hallucinogen
this causes the user to "see" things that aren't there and is extreme casess they will mutilate their own bodies to get rid of these "things" it also cause rapid heart beat leading to major heart problems<span />
