Question

Using a technique called "Patch Clamping", you can isolate a patch of membrane and then control the membrane potential across the patch of membrane (i.e., 1 change the potential difference across the membrane). 

You take a small patch of membrane, and change the membrane potential from the resting -70 mV to a lower potential difference of -15 mV and suddenly you detect a sudden influx of Nations across the patched membrane. 

Which of the following kinds of transporter is likely to be causing that influx of Na⁺? 

• The Na+/K+-ATPase 

• A ligand-gated Na+ channel 

• A voltage-gated Nat channel

•  A ligand-gated cation channel

Answer 1

Hyperpolarization is changing of membrane's potential to a more negative state.
Voltage gate channels play a important role in generating hyper polarization.
In such cases influx of Na+ is likely caused by a voltage gated Na+ channel.
Hence option C is the answer.