neurons

Question 1

what are neurons?

Answer 1

nerve cells that transmit electrical and chemical messages

Question 2

what are the three types of neurons?

Answer 2

motor, relay, sensory

Question 3

what are sensory neurons? + structure

Answer 3

carry information from PNS to CNS.
long dendrites, short axons

Question 4

what are relay neurons? + structure

Answer 4

carry info from Sensory neurons to motor neurons. Short dendrites, short axons

Question 5

what are motor neurons? + structure

Answer 5

carry info from CNS to effectors e.g. muscles and glands.
Short dendrites, long axons.

Question 6

what are the 6 parts of a neuron?

Answer 6

cell body,
dendrite
axon
myelin sheath
nodes of ranvier
axon terminal

Question 7

what is the function of cell body?

Answer 7

chemical reactions take place, contains nucleus and DNA

Question 8

what is the function of dendrite?

Answer 8

recieves neurotransmitters that go across synapse

Question 9

what is the function of axon?

Answer 9

carries electical impulse away from cell body

Question 10

what is the function of nodes of ranvier?

Answer 10

gaps in myelin sheath, speeds up transmission by creating jumps.

Question 11

what is the function of myelin sheath?

Answer 11

provides insulatiion for axon, speeds up process and protects axon

Question 12

what is the function of axon terminal?

Answer 12

neurotransmitters stores, electical impulses turn into chemical.

Question 13

what neuron is included in the reflex arc?

Answer 13

motor neuron

Question 14

how does electrical transmission work?

Answer 14

When a neuron is activated by a stimulus, the neuron fires and creates an electrical impulse, called action potential