10 Questions
Leak/leakage ion channels are always ______
open (open and close randomly)
Leak/leakage ion channels are responsible for the resting membrane potential for example ______ and Na+ leak channel
K+
Voltage gated channels are activated by changes in the electrical membrane potential near the ______
channels
Ion channels allow only ions of certain ______ or size
charge
The rate of transport through the channels is very ______
high
Selective permeability : ion channels allow only ions of certain ______ or size
charge
Ion channels pass through the channels down their ______ gradient
electrochemical
Ion channels that are activated by changes in the electrical membrane potential near the ______
channels
Gated channels has a gate which opens or closes in response to specific ______
stimuli
Rate of transport through the channels is very ______ than Carrier protein (×1000 )
high
Study Notes
Ion Channels
- Leak/leakage ion channels are always open, responsible for maintaining the resting membrane potential.
- Examples of leak/leakage ion channels include K+ and Na+ leak channels.
- Voltage-gated channels are activated by changes in the electrical membrane potential near the axon hillock.
- Ion channels are selective, allowing only ions of certain charge or size to pass through.
- The rate of transport through the channels is very fast, approximately 1000 times faster than carrier proteins.
- Ion channels allow ions to pass through down their concentration gradient.
- Gated channels have a gate that opens or closes in response to specific stimuli, such as changes in electrical membrane potential.
- Voltage-gated channels are a type of gated channel that responds to changes in electrical membrane potential near the axon hillock.
Test your knowledge of ion channels in physiology with this quiz! Explore the selective permeability, electrochemical gradient, and high transport rate of ion channels. Perfect for physiology students and anyone interested in understanding the principles of ion transport.
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