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.
Treatments can range from antibiotics to surgery.
Well I do not know what activity you chose but warming up your muscles before and workout helps loosen them up and help reduce straining and tight muscles during physical activity. Doing a cool down is the same as warming up. Cool down loosens up the muscles since they have been worked and stressed during an exercise.
Hope this helps!
Prolonged bed rest, Pregnancy, Decreases in blood volumes, Certain medications, Heart problems, Endocrine problems, Septic shock, Anaphylaxis, Neurally medicated hypotension, and Nutritional defiences.