5.4 The nervous system

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

What happens in the image on the left?

What is the name of number 5?

1. fovea
2. earwax glands
3. auricle
4. eardrum

What is the name of number 10?

1. fovea
2. earwax glands
3. auricle
4. eardrum

What is the name of number 6?

1. stirrup
2. anvil
3. hamer
4. tympanic cavity

What does a sensory cell produce once it picks up a stimulus?

What is the name of number 8?

1. retina
2. fovea
3. choroid
4. sclera

What is the name of number 2?

1. pupil
2. optic nerve
3. lens
4. cornea

What is the name of number 5?

1. blind spot
2. vitreous body
3. lens
4. sclera

Bs 4 The nervous system

• You can describe the structure and the functions of the nervous system. 
• You can describe the structure of a nerve cells and nerves. 
• you can describe a reflex arc.

Structure of the nervous system

Notes:

1. Central nervous system -Brain  

-spinal cord (ruggenmerg)

2. Nerves (zenuwen)

How does the nervous system work?

Notes:

Sensory cell receive stimulus from outside (ex. chocolate

Sensory cells                                                                                                                         = impulses                                nerves   

     brain    

 muscles

I need a brave volunteer for a small test

Path taken by nerve impulses

notes:

2 types of pathways

  1. Conscious reaction - voluntary response, example: girl and   chocolate

  2. Reflex - involuntary response, impulse does not go to the     brain but stays within the CNS

 example: withdrawal reflex = hand touches fire 

Nerve cell

Structure of the nerve cell 

Notes:

1. Cell body - located near the CNS

2. Axon - conducts impulses to and from cell body

What is a nerve?

Notes: 

nerve = a bundle of axons of nerve cells surrounded by a tough, protective layer

Get to work!

WHAT?

-read U5 B4 the nervous system (page 110 to 114)

-make U5 B4: exercises 1 to 3 + 5 to 7

DONE?

-test yourself

- learn the parts of the eye