Structure of the Nervous System

Question 1

Neurons

Answer 1

specialized cells that help you gather information about your environment, interpret and react to the information.

Question 2

Dendrites

Answer 2

Receive signals called impulses from other neurons and conduct the impulse to the cell body. Each neuron contains several dendrites.

Question 3

Cell Body

Answer 3

Where the nucleus and the cell organelles are found

Question 4

Axon

Answer 4

Carries the nerve impulses from cell body to other neruons

Question 4

Action potential

Answer 4

another name for a nerve impulse

Question 5

threshold

Answer 5

the minimum stimulus to cause an action potential

Question 6

Myelin

Answer 6

Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord

Question 7

nodes

Answer 7

gaps along the axon in between the myelin sheaths

Question 8

What is the function of myelin

Answer 8

Sodium and potassium ions cant diffuse through the sheets, but they can reach the plasma membrane at the node, so they jump from node to node increasing the speed of the eimpulse

Question 9

What is the difference between neurons with and without myelin

Answer 9

With Myelin; faster delivery of impulse: for sharp pain

Without Myelinl slower delivery of impulse: slow: throbbing pain.

Question 10

neurotransmitter

Answer 10

Their job is to carry chemical signals from one neuron to The next target cell by binding to its receptors on the dendrite

Question 11

how many neurotransmitters are there

Answer 11

25