basics 2 Touch, smell and taste

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

Bs 2 touch, smell, taste

B2 Touch, smell, taste

Lesson goals

• You can describe the structure and functions of the skin
• You can say how you smell different scents
• You can say how you taste different flavours

Sensory organs

What are stimuli and impulses

1. A stimulus is something that sensory organs take in. Impulses are signals in the nerves
2. An impulse is something that sensory organs take in. Stimuli are signals in the nerves
3. They are both something taken in by sensory organs
4. They are both signals in your nerves

Which of these does the brain use to make your muscles move.

1. Stimulus
2. Impulse

Eye
	Scents
Tongue

Nose

Tastes

Light

Sound

Ear

Stimulus

location of sensory organ

Sensory organs in the skin

5 different sensory organs

1. cold receptor
2. pressure receptor
3. heat receptor
4. touch receptor
5. pain receptor

cold receptor

pressure receptor

heat receptor

touch receptor

pain receptor

nerves

Hair

touch receptor

corneal layer

basal layer

dermis

subc. connective tissue

sebacious gland

sweat gland

follicle

bloodvessel

pressure receptor

hair muscle

pain receptor

What happened to this hand?

The nose

nerve

sensory cells

scent particles

The tongue

Sweet, salt, etc. can be experienced everywhere on your tongue! Not in specific places 

!

tongue

taste buds in the tongue

mucus gland

nerve

nerve

sensory cell

taste bud

groove

 a taste bud

Write down your name and the answers on your paper:

1. A sense is: .................

2. Which two senses do your ears have? 

3. Explain how a cavity (in your tooth) can cause a toothache. Use the the route in your body in which the message is sent.