6.1 Responding to your surroundings

CHAPTER 6
Senses, coordination and behaviour
1 / 23
next
Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 1

This lesson contains 23 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 120 min

Items in this lesson

CHAPTER 6
Senses, coordination and behaviour

Slide 1 - Slide

Today
  • 6.1 Responding to your surroundings
  • Explaination and assignments LessonUp
  • Assignment 2 + 3 + 4

Slide 2 - Slide

After this lesson you'll know
  • What a sense organ is and where to find them in your body
  • How sense organs work
  • The meanings of the keywords: stimulus, impulse, threshold value

Slide 3 - Slide

Senses

Slide 4 - Mind map

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

Slide 5 - Slide

Sense organs = zintuigen
Eyes, ears, nose, tongue, skin

Together = sensory system

Slide 6 - Slide

Sensory organs

Slide 7 - Slide

All your senses together form the ...
A
nervous system
B
sensory system
C
brain system
D
sense canal

Slide 8 - Quiz

Sense organs send signals through the nerves to the ...
A
eyes
B
ears
C
brain
D
muscles

Slide 9 - Quiz

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

Slide 10 - Open question

Sense receptors in the skin

Heat receptors
Cold receptors
Pressure receptors 
Touch receptors

Slide 11 - Slide

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 

Slide 12 - Slide

Sensory cells
Sensory organs have sensory cells
Which are connected to nerves

When the senory cells recieve a stimulus they generate an impulse (kind of electrical signal)

Slide 13 - Slide

How an impulse starts
Stimulus needs to be strong enough -> threshold value
= the lowest intensity of stimulus that causes an impulse

Example: a sound needs to be hard enough to hear 
-> Soft sounds don't cause impulsesthe lowest intensity of stimulus that causes an impulse

Slide 14 - Slide

Adequate stimuli
A stimulus that sensory cells are particularly sensitive for 

Sensory cells in your eyes respond to light
Light is the adequate stimulus

Slide 15 - Slide

Match the correct adequate stimulus to the sensory organ
Sound
Taste
Light
Smell

Slide 16 - Drag question

Non-adequate stimuli
Sometimes sensory organs will response to other stimuli
When you got hit in your eyes, you will see "stars"
But, the threshold value is higher than for the adequate stimulus

Slide 17 - Slide

Habituation = gewenning

If a stimulus doesn't go away for a long time, your sensory cells will produce less impulses

You don't really feel your clothes on your body because of habituation

Slide 18 - Slide

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

Slide 19 - 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
impulse
D
habituation

Slide 20 - Quiz

Nervous system
Central nervous system
- Brain
- Spinal cord

Nerves

Slide 21 - Slide

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.

Slide 22 - Open question

Let's get to work
Read 6.1 in your (online) textbook
Make assignments 2, 3 and 4 in your (online) workbook

Slide 23 - Slide