5 Questions
Which type of ion channels are regulated by chemical messengers called ligands?
Ligand-gated ion channels
What is the definition of excitability?
The ability of a cell to send and receive electrical signals across the plasma membrane
Which ions move into the cell during excitation?
Sodium, chloride, and calcium
What type of ion channels are regulated by changes in charge in the surrounding environment?
Voltage-gated ion channels
Which type of ion moves out of the cell during excitation?
Potassium
Test your knowledge on excitable cells and their ability to send and receive electrical signals. Learn about the definition of excitability, the role of ions, and the different types of ion channels. Challenge yourself with questions on ligand- and voltage-gated channels and their passive transport characteristics.
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