Nerve Tissue

Question 1

What are nerves

Answer 1

Made up of cells called neurons

Question 2

What do neurons do

Answer 2

Carry messages in form of electrical signals, from one part of the body to another

These messages are known as nerve impulse

Question 3

Structure of Neurone - Cell Body

Answer 3

Contains nucleus

Where all materials needed by cell is made

Question 4

Structure of Neurone - Axon

Answer 4

Conduct electric impulse called ‘action potential’

Question 5

Structure of Neurone - Nucleus

Answer 5

Controls and regulates activities of cell (e.g growth and metabolism)

Carries genes

Question 6

Structure of Neurone - Dendrite

Answer 6

Receives chemical signals from axon terminal of other neurons

Question 7

Structure of Neurone - Schwann Cell

Answer 7

Produces myelin sheath

Question 8

Structure of Neurone - Node of Ranvier

Answer 8

Gaps in myelin sheath; allows electrical impulses to pick up speed

Question 9

Structure of Neurone - Myelin Sheath

Answer 9

Electrically insulating layer

Question 10

Why is there myelinated/ non nerve cells

Answer 10

Most nerve cells are myelinated

Those not are small diameter nerves usually responsible for transmitting pain, such as aches and soreness rather than sharp pain

Also detect temp change

Question 11

Difference between myelinated/ non nerve cells

Answer 11

Non transmit impulses slower while myelinated very fast

Non doesnt have nodes of ranvier while myelinated does

Non is grey while myelinated white