Neurotransmitters, such as acetylcholine--the major neurotransmitter found in the human body, act over a short time and they are quickly removed from the synapse by enzymes (i.e. acetylcholinesterase which breaks down acetylcholine to acetyl-CoA and choline).
Another difference is that protists<span> belong to the kingdom </span>Protista<span>, while </span>bacteria<span> are members of the Monera kingdom. </span>Bacteria<span> are uni-cellular organisms that do </span>not<span> contain organelles like a nucleus or chloroplasts.
if this helps </span>
The hypothalamus synthesizes and secretes certain hormones called releasing hormones which stimulate the secretion of pituitary hormones.
The hypothalamus gland uses the nervous system and secretes hormones which sends messages to the pituitary hormones.
