Nerves

Question 1

What is the purpose of dendrites?

Answer 1

conducts impulses towards cell body

Question 2

Whats the purpose of an axon?

Answer 2

Transmits impulses away from cell body

Question 3

What does the cell body contain?

Answer 3

Nucleus

Question 4

Describe motor neurone

Answer 4

Spinal cord - Impulses from CNS to effectors

Question 5

Describe sensory neurone

Answer 5

Cell body coming off of axon, PNS

Sensory cells to CNS

Question 6

Describe relay neurone

Answer 6

Cell body in axon

CNS, sensory-motor

Question 7

What do schwann cells do?

Answer 7

wrap around axon creating insulating layer called myelin sheath

Question 8

What are the gaps between schwann cells?

Answer 8

Nodes of Ranvier

Question 9

Define nerve

Answer 9

Bundle of axons of many neurones that transmits impulses to the brain or spinal cord

Question 10

What is grey matter made of?

Answer 10

cell bodies, synapses and dendrites

Question 11

What is white matter made of?

Answer 11

nerve axons

Question 12

What is the definition of a receptor

Answer 12

Detect stimuli and send impulses to CND

Question 13

Define effector

Answer 13

Tissue that responds to a nerve impulse or hormone

Question 14

Define reflex

Answer 14

pattern of behaviour involving a rapid response to stimulus

Question 15

Describe pupils constricted

Answer 15

Radial muscles relax and circular muscles contract

Question 16

Describe pupils dilated

Answer 16

Radial muscles contract and circular relax

Question 17

Describe the stages of impulses

Answer 17

Receptor, sensory, relay, motor, effector resposnse

Question 18

Describe pupil reflex

Answer 18

Receptor, sensory, relay, parasympathetic, motor, effector ,response