Structure And Function Of Sensory, Relay And Motor Neurons

Question 1

What are the three neurons?

Answer 1

Sensory
Relay
Motor

Question 2

What’s the location of the sensory neuron?

Answer 2

The PNS in clusters known as ganglia

Question 3

Which neuron is located in the PNS in clusters known as ganglia?

Answer 3

Sensory neuron

Question 4

What’s the function of the sensory neuron?

Answer 4

Sends information from the senses (PNS) towards the brain (CNS)
Receptors found in the eyes, ears, tongue, skin

Question 5

The sensory neuron sends u formation from the senses to where?

Answer 5

The brain (CNS)

Question 6

What’s the structure of the sensory neuron?

Answer 6

Long dendrites and short axons

Question 7

The sensory neuron has long what? And short what?

Answer 7

Long dendrites
Short axons

Question 8

Look at what the sensory neuron looks like

Answer 8

…

Question 9

Why are dendrites long in the sensory neuron?
Why are axons short?

Answer 9

Long dendrites - to cover large surface area
Short axons - only sending information from PNS to CNS

Question 10

What’s the location of the relay neuron?

Answer 10

In the brain and the visual system

Question 11

Which neuron is ground in the brain and the visual system?

Answer 11

Relay neuron

Question 12

What’s the function of the relay neuron?

Answer 12

Found in the CNS. They carry nerve impulses between neurons allowing sensory and motor neurons to communicate
Involved in analyzing the sensations from these neurons and deciding how to respond.

Question 13

The relay neuron carry’s nerve impulses between neurons, thus allowing what?

Answer 13

Sensory and motor neurons to communicate

Question 14

The relay neuron analyses what?

Answer 14

Sensations from sensory and motor neurons and deciding how to respond

Question 15

What’s the structure of the relay neuron?

Answer 15

They have short dendrites and short axons and no myelin sheath

Question 16

Does the relay neuron have a myelin sheath?

Answer 16

No

Question 17

Why do relay neurons have short dendrites? And short axons? And no myelin sheath?

Answer 17

Short dendrites - only attach to one sensory neuron, small surface area
Short axons - not far from the message to travel
No myelin sheath - doesn’t need speeding up only going from one relay neuron to another

Question 18

What’s the location or the motor neuron?

Answer 18

Cell bodies are found in the CNS but the long axons from part of the PNS

Question 19

Which neuron is located CNS ( cell body) and PNS (long axons)?

Answer 19

Motor neurons

Question 20

What’s the function or the motor neuron?

Answer 20

Sends information via long axons from the CNS through to effectors such as muscles and glands

Question 21

The motor neuron sends information via…. From the …..through to …. such as muscles and glands

Answer 21

Long axons
CNS
Effectors

Question 22

What are effectors?

Answer 22

Muscles or glands

Question 23

What’s the structure of the motor neuron?

Answer 23

Short dendrites and long axons

Question 24

Why are the dendrites short and the axons long in motor neurons?

Answer 24

Short dendrites - only connected to one muscles
Long axon - sends messages from Brian to effector