Neurons

Question 1

Sensory neuron

Answer 1

• long dendrites
• short axons
• peripheral NS to central NS
• afferent

Question 2

Relay neurons

Answer 2

• short dendrites
• short axons
• connects different neurons together

Question 3

Motor neurons

Answer 3

• short dendrites
• long axons
• central NS to peripheral NS
  -effector (muscles and glands)

Question 4

Dendrite

Answer 4

carries impulses from neighbouring neurons towards cell body

Question 5

Cell body

Answer 5

contains nucleus which contains DNA

Question 6

Nucleus

Answer 6

Contains genetic material

Question 7

Axon

Answer 7

Carry nerve impulses away from cell body down length of neuron

Question 8

Node of ranvier

Answer 8

Gaps between myelin sheath
- speed up transmission of the impulse

Question 9

Myelin Sheath

Answer 9

Fatty layer covering axon which protects and speeds up transmission

Question 10

Axon terminal

Answer 10

Communicate with next neuron in chain

Question 11

Reflex Arc

Answer 11

• stimulus hits…
• detected by sense organs in the PNS
• sensory neurons carry info to motor neurons
• effectors (muscle/gland) contracts so… moves or jerks