Neurons in the brain form complex networks designed to transmit chemical message

Question

Neurons in the brain form complex networks designed to transmit chemical messages across neural synapses. Psychoactive drugs have an affinity for the same neural pathways as the neurotransmitters that chemically resemble them. This "lock and key" theory of drug action (with the neural receptors being the lock and the drug molecules, the keys) is sometimes used to explain the different cognitive and behavioral effects produced by different drugs. To show your understanding of this oversimplified but useful concept, correctly match the neurotransmitters listed below with the specific messages they transmit.

A.   
opens ion channels to reduce speed of transmission of neural impulses

B.   
alters mood and sensory nerve signals

C.   
neurotransmitter that alters reception of pain from the internal organs

D.   
excitatory monoamine neurotransmitter

E.   
transmits feelings of pleasure

please match with dopamine, GABA, norepinephrine, serotonin, endorphin and A,B,C,D,E

Explanation / Answer

A) opens ion channels to reduce speed of transmission of neural impulses : GABA

B) alters mood and sensory nerve signals : Serotonin

C) neurotransmitter that alters reception of pain from the internal organs : Dopamine

D) excitatory monoamine neurotransmitter : Norepinephrine

E) transmits feelings of pleasure : Endorphin

Gamma amino butyric acid opens the channels to allow negatively charged chloride ions or positively charged potassium ions causing hyperpolarization of membrane potential. it is inhibitory in function.

Serotonin is a monoamine that alter mood and increases the satiety, sleep etc.

Dopamine is also a monoamine involved in regulation of motor system, endocrine system and cognition. it reduces or alters the pain signals produced in the internal organs.

Norepinephrine or noradrenaline is a monoamine neurotransmitter that can be excitatory and inhibitory in function.

Endorphins are relased during physical exercise and trasmit the feeling of pleasure.

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