12 Questions
Which cation is the major cation found inside the cell?
Potassium (K+)
Which anion is the major anion outside the cell?
Chloride (Cl-)
Which cation is the major cation outside the cell?
Sodium (Na+)
Which factor has a direct relationship with the rate of diffusion?
Temperature
Which medium allows for the fastest diffusion?
Gases
Which factor establishes an indirect relationship with the rate of diffusion?
Size of particles
Which type of cells have membrane potential?
Excitable cells
What determines the membrane potential?
The concentration of ions inside the cell
What is the equilibrium potential?
The potential difference at which the electrical and chemical gradients for a certain ion are equal
Which type of ion channel is responsible for the generation of local and action potentials?
Regulated (gated) ion channels
What regulates the opening or closing of ligand-gated ion channels?
Neurotransmitters
What determines the conductance of ion channels?
The probability of the channel being open or closed
Test your knowledge on cell membrane functioning and the role of potassium, sodium, chloride, and proteins with this quiz!
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