5.2 the senses

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

The senses

stimuli and responses

stimulus

sensory receptor

neurons

effectors

response

stimuli plural

stimulus

How does the nervous system work?

1. A stimulus comes from the enviroment
2. Sensory receptors convert the stimulus
3. The nerve impulse goes to the brain
4. The neurons conduct the impulses
5. In the brain you become aware
6. The brain sends impulses to an effector
7. The effectors create a response

pathway

stimulus = external or internal change

sensory receptors = convert stimuli into electrical signals

neurons = bring these signals to your brain (impulses)

effectors = are told how to react by your brain (via impulses through neurons)  that's your response

5.2 the senses

Keywords

1st: think by yourself what did I understand?

2nd: talk with your neighbour about the video

3rd: we share it in the class

Explain the following keywords:

stimulus, 

sense & sensory organ

senses

vision - light rays

hearing - sound waves

smell - chemicals

taste - chemicals

feeling - pressure, pain, touch and  temperature

five difficult words

1. detectors

2. pleasant 

3. receptors      

4. corrresponding              <--           

5. internal/external                       

1 detector/sensor

2 nice

3 reads a stimuli and changes it into an impulse (electrical signal)

4 matching

5 inside/outside

      

Difficult words: what do the folowing words mean?

1. detectors 2. pleasant 3. receptors 4. internal 5. external

Read

BOOK: BRICKS textbook -> Ch5 Sense it

What: 5.2 the senses

HOW: 10 minutes, in silence (whispering is allowed)

DONE? start with exercises 4-8 (Workbook page 122)

Match the correct adequate stimulus to the sensory organ

Sound

Taste

Light

Smell

Questions for 2

Could a stimulus be external and internal? (give an example)

Do you remember what a sensory receptor is?

What is a neuron?

Could give an example of an effector?

How are the effectors directed?

stimulus = external or internal change

sensory receptors = convert stimuli into electrical signals

neurons = bring these signals to your brain (impulses)

effectors = are told how to react by your brain (via impulses through neurons) that's your response

If you eat spaghetti which senses do you use?

1. taste, hear, smell
2. taste, smell, see
3. touch, smell, see
4. touch, hear, see