The different types of gated channels

What are chemically gated channels

• Chemically gated ion channels open when they bund specific chemicals such as the neurotransmitter acetylcholine

• Most abundant where synaptic communication occurs (on the cell body and dendrites)

• Graded potential depends on chemically gated ion channel

• Once ACh dissolves or detaches, the channel will close.

What are Voltage-Gated Channels

Voltage-Gated channels

• Voltage gated ion channels open or close in response to changes in membrane potential.

• Capable of generating and spreading an action potential down the axon of the neuron.

• The function independently. An activation gate opens on stimulation, letting sodium ions into the cell, and an inactivation gate closes to prevent the entry of sodium.  

• Located on the axon and the axon terminal

What is are mechanically gated channels

• Mechanically gated ion channels open in response to mechanical stimuli that physically distort the neurons membrane surface

• Important in sensory receptors that respond to stretch, pressure or vibration

• Cause the sense of touch and hearing

What channel is this?

Chemically gated channels

What channel is this?

Voltage gated channels

What channel is this?

Mechanically gated channels