Neurons 1 quiz

Glial cells are used for ____, and neurons are used for ____

• Communication, support

• support, communication

• communication, communication

• support, support

Leak and voltage/ligand-gated channels are examples of _______ transport, meaning the ion using these proteins is moving from _____ concentration

• Active, high to low

• Passive, low to high

• Active, low to high

• passive, high to low

Leak channels ______ gated, meaning they are _____ open

• are, always

• are not, always

• are not, not always

• are, not always

The nicotinic receptor requires the binding of acetylcholine in order to open and allow the diffusion of surrounding ions. This receptor is an example of _______

• Voltage-gated ion channel

• Ligand-gated pump protein

• Voltage-gated pump protein

• Ligand-gated ion channel

Random movement of ions across the membrane is made possible by _______

• Ion gated channels

• Ion leakage channels

• Gated channels

• Protein pumps

As sodium ions near this channel, its charge influences a conformational change and thus opens the protein, allowing the ion to diffuse across the membrane...

• Ligand-gated ion channel

• Mechanically gated channel

• Thermoreceptors

• Voltage-gated ion channel

Compared to the extracellular fluid, the inside of the cell is _____ negative.

• more

• less

• equally

Membrane potentials ______ change, which leads to excitation and eventually the return to rest of a cell. This is caused by _____

• can, movement of ions

• cannot, movement of ions

• can, diffusion of sodium and potassium

• cannot, diffusion of calcium

During depolarization, the inside of the cell becomes ______

• More negative

• More positive

• Less negative

• Less positive

During repolarization, the inside of the cell ______

• Becomes even more negative than when at rest

• becomes more positive than when at rest

• returns to rest