Which of the following best describes the effect of GABA on neural communication?

Which of the following best describes the effect of GABA on neural communication?

• A. It enhances communication.
• B. It inhibits communication.
• C. It has no effect on communication.
• D. It speeds up communication.

Answer: (B)

GABA, or gamma-aminobutyric acid, is the primary inhibitory neurotransmitter in the central nervous system. When GABA binds to its receptors on neurons, it typically causes an influx of negatively charged ions, such as chloride, into the cell. This mechanism makes the inside of the neuron more negatively charged relative to the outside, which hyperpolarizes the neuron and makes it less likely to fire an action potential. This inhibitory action effectively reduces the likelihood of neural communication occurring in the presence of GABA. As a result, GABA plays a critical role in regulating excitability and maintaining balance within neural circuits. It contributes to processes such as reducing anxiety, controlling mood, and preventing over-excitation of neurons, which can lead to conditions like seizures. Therefore, the description that GABA inhibits communication accurately reflects its function in the neural communication process.

GABA, or gamma-aminobutyric acid, is the primary inhibitory neurotransmitter in the central nervous system. When GABA binds to its receptors on neurons, it typically causes an influx of negatively charged ions, such as chloride, into the cell. This mechanism makes the inside of the neuron more negatively charged relative to the outside, which hyperpolarizes the neuron and makes it less likely to fire an action potential.

This inhibitory action effectively reduces the likelihood of neural communication occurring in the presence of GABA. As a result, GABA plays a critical role in regulating excitability and maintaining balance within neural circuits. It contributes to processes such as reducing anxiety, controlling mood, and preventing over-excitation of neurons, which can lead to conditions like seizures. Therefore, the description that GABA inhibits communication accurately reflects its function in the neural communication process.