Physiology: Nervous Tissue Part 2

Impulse within a neuron can vary in magnitude.

• True

• False

Answer explanation

an impulse is always the same regardless of stimulus. "All or none"

Which type of ion channel is always open?

• gated

• leakage

• enzyme

• pore

When part of a protein changes shape to open/close channel.

• gated channel

• leakage channel

What are the types of gated ion channels? SATA

• mechanical gated

• water gated

• voltage gated

• ligand-gated

Ion channel that opens with a binding of a specific neurotransmitter.

• voltage gated

• mechanically gated

• chemically gated

Ion channel that will open and close in response to changes in membrane potential.

• voltage-gated channel

• mechanically gated

• chemically gated

ion channel that opens and closes in response to physical deformation of receptors.

• mechanically gated

• chemically gated

• voltage-gated channel

Ions diffuse ....

• against electrical gradient

• along concentration gradient

• against concentration gradient

• along electrical gradient

Which best describes the resting membrane potential?

• 0 mV

• +50 mV

• -40 mV

• -70mV

Which type of channels are more numerous in cell membranes?

• K leakage channels

• Na leakage channels

• Ca leakage channels