5.4 The nervous system

Today's planning
1. Repeat basic 1 
2. Basic 4 the nervous system
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Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 19 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 45 min

Items in this lesson

Today's planning
1. Repeat basic 1 
2. Basic 4 the nervous system

Slide 1 - Slide

Repeat 
Unit 5 bs 1

Senses, coordination and behaviour

What happens in the image on the left?

Slide 2 - Slide

What is the adequate stimulus for the sense of seeing?

Slide 3 - Open question

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

Slide 4 - Open question

What do we call the lowest intensity that can cause an impuls?
A
Adequate stimulus
B
Threshold value
C
impuls
D
habituation

Slide 5 - Quiz

If a stimulus does not go away for some time, it starts producing less impulses in the cell. What do we call this?
A
Adequate stimulus
B
Threshold value
C
impuls
D
habituation

Slide 6 - Quiz

Bs 4 The nervous system
  • You must be able to name the functions of the nervous system. 
  • You must be able to describe the structure of a nerve cell and a nerve. 
  • You must be able describe the three types of nerve cells. 

Slide 7 - Slide

Structure of the nervous system
Notes:
1. Central nervous system (CNS) = Brain and spinal cord
2. Nerves

Slide 8 - Slide

How does the nervous system work?
Notes:
Sensory cell receive stimulus from outside (ex. chocolate
Sensory cells                                                                                                                         = impulses                                nerves   

     brain    

 muscles

Slide 9 - Slide

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 

Slide 10 - Slide

Nerve cell

Slide 11 - Slide

Structure of the nerve cell 
Notes:
1. Cell body - located near the CNS
2. Axon - conducts impulses to and from cell body

Slide 12 - Slide

Slide 13 - Slide

What is a nerve?
Notes: 
nerve = a bundle of axons of nerve cells surrounded by a tough, protective layer

Slide 14 - Slide

Slide 15 - Slide

Motor neuron
Interneuron
Sensory neuron
carries impulses inside the central nervous system
carries impulses from central nervous system to muscles or glands
receives impulses from sensory neurons or interneurons
Receives impulses from interneurons
receives impulses from sensory cells
brings impulses to the central nervous system

Slide 16 - Drag question

Make the worksheet in studiewijzer

You may work alone or in pairs. 
If you work together, you both fill in the worksheet.

Slide 17 - Slide

Unit 5 basic 4 the nervous system

Do assignments 5, 6, 7, 8 en 9

Slide 18 - Slide

Homework: worksheet nerves & nerve cells
  • You must be able to name the functions of the nervous system. 
  • You must be able to describe the structure of a nerve cell and a nerve. 
  • You must be able describe the three types of nerve cells.

Slide 19 - Slide