5.1 - Percieving your environment

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Unit 5 Perception, behaviour and regulation

Today's lesson

- Introduction to your senses

- Which organs are we talking about?

- How do impulses start?

- How does your nervous system function?

You can sense things around you. What can you sense around you? List 5 of your senses.

Senses

• Sight
• Sense of hearing
• Sense of balance
• Sense of smell
• Sense of taste
• Sense of heat/cold
• Sense of touch/pressure 

Sensing things

Sensing things

You see and smell chocolate

Using sense organs

Signal (impulse) through nerves to your brain

Brain send impulse to arm muscle -> you grab the chocolate

Sense organs = zintuigen

Eyes, ears, nose, tongue, skin

Together = sensory system

Sensory organs

Sense organs send signals through the nerves to the ...

1. eyes
2. ears
3. brain
4. muscles

All your senses together form the ...

1. nervous system
2. sensory system
3. brain system
4. sense canal

How do you call the signals the sense organs send out?

Sense receptors in the skin

Heat receptors

Cold receptors

Pressure receptors 

Touch receptors

Reacting to the surrounding

Stimulus (prikkel) = information from the surrounding

Light, temperature, smell, sounds, skin contact

Stimulus -> sense organ -> impulse -> nerves -> brain 

Brain responds with a impulse to the muscles to react 

Which square is darker?

Which square is darker?

Sensory cells

Sensory organs have sensory cells

Which are connected to nerves

When the sensory cells receive a stimulus they generate an impulse (kind of electrical signal)

Fill in the right words:
The smell of a fresh panini comes into your nose, this is called a .... Then a .... is sent through the nerves to the brain.

Let's get to work

Read 5.1 in your  textbook

Make assignments 1,2, 3 and 5 in your workbook