Question

Consider channel activation by agonists:
(A). Nm receptors allow influx of sodium ions
(B). Glycine receptors allow influx of chloride ions
(C). \(\text{GABA}_\text{A}\) receptors allow influx of chloride ions
(D). \(\text{GABA}_\text{B}\) receptors allow influx of chloride ions
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A), (B) and (C) only.
• C. (A), (B), (C) and (D).
• D. (A), (C) and (D) only.

Hint:

To remember GABA receptor differences:
- \(\text{GABA}_\text{A}\) is ionotropic: Directly opens a chloride (\(\text{Cl}^-\)) channel.
- \(\text{GABA}_\text{B}\) is metabotropic: Works through G-proteins to affect potassium (\(\text{K}^+\)) and calcium channels.

Answer 1

The Correct Option is B