Wrong - The answer is Neurotransmitter
Those doing their UoP homework in this way are brilliant, yet susceptible to wrong answers.
In the cytoplasm of their target cells
A synaptic cleft is the gap into which a chemical is released.
There are three kinds of chemical messengers in the nervous system: Neurotransmitters, endorphins and hormones. 1) Neurotransmitters are released by transmitting neurons. They alter the activity of the receiving neurons. Note that neurotransmitters exist outside of the nervous system as well. Some neurotransmitters are: Serotonin, dopamine, acetylcholine, gamma-aminobutyric acid (GABA), norepinephrine (also a hormone) and glutamate. 2) Endorphins help in pain reduction, pleasure and even memory. 2) Hormones are affects the functioning of organs and are released by glands. Some hormones include: Melatonin, oxytocin, adrenal hormones (cortisol, epinephrine, norepinephrine) and sex hormones (androgens, estrogens and progesterone).
That part of the energy in a substance that can be released by a chemical reaction
Chemical Energy is what is released.
neurotransmitter
In the cytoplasm of their target cells
Its called antibiotics
The Messengers was released on 02/02/2007.
Pheromone
Pheromones.
The Messenger - 1918 was released on: USA: 1 April 1918
The Messenger - 1921 was released on: USA: 20 November 1921
The movie "Kill the Messenger" is a French documentary film that was released in 2006. This film exposes the criminality that was uncovered at the FBI.
Disturbing Behavior was released on 07/24/1998.
The Messenger - 2013 was released on: USA: 13 March 2013 (internet)
The Messenger - 2006 I was released on: USA: 20 September 2006 (limited)