Nervous System quiz

what is satlatory conduction?

• polarization

• action potential

• act of impulse skipping along myelin sheath

• depolarization

what happens during the first step of nerve transmission (resting potential)? (select all that apply)

• membrane is polarized

• (-) K+ inside, (+) Na+ outside

• (+) K+ inside, (-) Na+ outside

• neuron is at rest

what happens during the second stage of impusle conduction (depolarization)? (select all that apply)

• a stimulus causes Na+ chambers to open and Na+ the cells

• inside membrane becomes (+)

• inside membrane becomes (-)

• the neuron becomes depolarized

what happens during action potential (3rd step)? (select all that apply)

• if stimulus is strong enough, it skips along the axon of the neuron

• neuron perfroms a function

• inside becomes (+), outside becomes (-)

• the neruon returns to resting potential

what happens during repolarization (step 4)?

• K+ channels open, neruon instantly becomes polarized

• K+ channels open, K+ moves out, and Na moves back in

• K+ channels open, K+ moves in, and Na+ moves back out

• this is the last step

what happens during refractory period (step 5)? select all that apply

• Na/K pump restores resting potential

• provides a period of 'rest' before next impulse

• carries out impulse

• Na/K pump causes depolarization

what are the fucntions/characteristics of grey matter?

• have no myelin

• movement, touch

• vibration

• interneurons

what are the functions/characteristics of white matter?

• bundles of myelinated axons

• communication routes

• touch, vibration

• bundles of axons

what are the sensory functions of the cerebral cortex? (select all that apply)

• pinpoint location of pain

• identify textures

• proprioception

• reflec arc

what is the function & location of the post central syrus? (select all that apply)

• cerebrum, primary sensory area of brain

• temporal lobe, primary somatic sensory area of brain

• cerebral cortex, primary somatic sensory of brain

• temp/touch/sensory receptors