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Endorphins - Morphine & Heroin

Horizontales
The fact or condition of being addicted to a particular substance, thing, or activity.
Receptors located in the brain and various organs that bind opiates or opioid substances.
Neurotransmitter that prevents the generation of action potentials.
An analgesic and narcotic drug obtained from opium and used medicinally to relieve pain.
A chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.
A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
A highly addictive analgesic drug derived from morphine, often used illicitly as a narcotic producing euphoria.
Verticales
The change in electrical potential that occurs between the inside & outside of a nerve or muscle fiber when it is stimulated, which transmits nerve signals. (A nerve Impulse)
Neurotransmitter that increase the likelihood that a nerve cell will produce an action potential.
The natural action or intended purpose of a person or thing in a specific role.
A compound thought to be involved in the synaptic transmission of pain and other nerve impulses.
The way something is built arranged or organized. (Morphine & heroin share this similarity)
Illness or sickness characterized by specific signs and symptoms.
System that consists of the brain & spinal cord. (3 letter abbreviation)