6.2 Nerve Impulse And Neurons

Question 1

Nerve impulse is conducted where

Answer 1

Along the surface of the neuron

Question 2

Glial aka Neuroglial cells are

Answer 2

The support cells, make up 90% of nervous tissue

Question 3

Projections off the neuron cell head and increase surface area of the cell body

Answer 3

Dendrites

Question 4

The long projection of the neuron is called the

Answer 4

Axon

Question 5

Where the axon meets the cell body

Answer 5

Axon hillock (where action potential starts)

Question 6

Distal end of the axon is the

Answer 6

Axon terminal

Question 7

Neurons do not divide, can live and function for a lifetime, and usually cannot be repaired (if cell body damaged)

Answer 7

True

Question 8

Neurons are highly metabolic meaning

Answer 8

They require a lot of oxygen and glucose

Question 9

The signal cannot go backwards because

Answer 9

Of the refractory period of the open sodium channels next to it (as ions diffuse both directions)

Question 10

Once the AP reaches the Axon terminal

Answer 10

Opens the voltage gated Ca channel, then
Phospholipid bilayer balls containing Neurotransmitters will be signaled to released

Question 11

Depolarization (pos) of the post-synaptic cell is called

Answer 11

Excitatory post synaptic potential
EPSP

Question 12

Hyper polarization (neg) affect on post synaptic cell is called

Answer 12

Inhibitory post synaptic potential
IPSP