Na+ channels are because they allow ions into the cell depolarizing the membrane and driving it  the the threshold (firing) potential. Cl- channels are because they allow ions into the cell making it for the membrane to depolarize. K+ channels are because they allow ions out of the cell making it for the membrane to depolarize.

Match each description in the left column with the best response from the right column.

The movement of the water across the cell membrane from an area of higher to lower concentration is known as:

Where is the higher concentration of pottasium (K+) found?

If the membrane potential becomes more negative than  -70 mV (resting), it is known as:

How does the neuron code for the strength of stimuli?

Match the type of neuron with the appropriate description

In the resting cell, the “force” that pushes K+  out of the cell is  ______, while the “force” that tends to pull K+ back into the cell is  ______.

Which of the following is NOT a key concept about ligand-gated ion channels?

Activity 7:  Which fibers generate the smallest value for conduction velocity?