Sorry if this may be late...
Answer: A good night’s sleep is usually 7-9 hours long, varying by age and maturation. Preparing for a good night’s sleep should include limiting caffeine, avoiding big meals, avoiding alcohol, and avoiding eye-strain before sleeping.
Habits that prevent a good night’s include [everything said not to do listed in the above paragraph].
That would be 2 it goes into all those numbers
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:
muscles -D
Explanation:
the circulatory system consists of three independent systems that work together the heart, the lungs, and arteries, veins , coronary and portal vessels .
