Question

Which one of the followings acts solely as an inhibitory neurotransmitter?

• A. Norepinephrine
• B. Gamma $\left(\gamma \right)$ amino butyric acid
• C. Acetylcholine
• D. Dopamine

Answer 1

The correct option is B Gamma $\left(\gamma \right)$ amino butyric acid

Neurotransmitters, also known as chemical messengers, are chemicals that enable neurotransmission and communicate information throughout our brain and body. Here are two kinds of neurotransmitters – Excitatory and Inhibitory. Excitatory neurotransmitters are not necessarily exciting – they are what stimulate the brain. Those that calm the brain and help create balance are called inhibitory.

Excitatory neurotransmitters include dopamine, norepinephrine, epinephrine, histamine, etc.

GABA (gamma-aminobutyric acid is an inhibitory neurotransmitter. When GABA is out of range (high or low excretion values), it is likely that an excitatory neurotransmitter is firing too often in the brain. GABA will be sent out to attempt to balance this stimulating over-firing.

So, the answer is B.