Nerve impulse

Nerve cells receive stimuli and they convert them to electrical ________________

How is the conversion of the environmental stimulus into an electrical signal called?

• Transformation

• Transduction

• Translocation

What is a nerve impulse

• the main body of the nerve cell

• the dendrites of the nerve cell

• an electrical current

The resting membrane potential is:

• +40mV

• -70mV

• -20mV

• 0 mV

Which ions are MAINLY implicated in the potential of the membrane?

• Na and Ca

• Ca and Fe

• K and Cl

• Na and K

During an action potential the membrane potential goes from the resting potential (typically -70 mV) to some positive value (typically about ________) in a very short period of time (just a few milliseconds).

Dendrites ____________ information.

What happens during an action potential, in terms of polarity? You need to give two terms describing the different phases.

Membrane potential is:

• positive during resting and negative during action

• negative during resting and positive during action

• always negative

• always positive