Question

Describe ion channels in a minimum of seven sentences. Hint:   Make sure to include nerve cell signaling ad membrane potential in your discussion.

Answer 1

1)Ion channels can be defined as the pores in the membrane that is used for the transportation of ions across the membrane from high concentration to low concentration without the expenditure of energy .

2) The transfer of ions across the cell membrane is very high approximately around 10^6 ions are transported per minute .

3) ions transport from one location to another based on the the electrochemical gradient and membrane potential gradient across the cell membrane without the hydrolysis of ATP.

4) ions channels are important for the transmission of nerve cell signaling . Ions channels are important for the generation of electrical stimulus in the postsynaptic membrane.  

5) The toxins released from various animals such as snakes , insects , scorpions result in the modulation of the ion channels in the heart and nervous cells which leads to the death of the individual .

6) The ion channels are classified based on the gating :- voltage gated , ligand gated , lipid gated , potassium channels gated .

7) The ion channels are also classified on the basis of ions such as chloride channels , potassium channels , sodium channels , calcium channels and proton channels .

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