## Step1

Senses

Study the following:

#### Stimuli You recieve stimuli from the environment through your senses. Senses are made from nerve cells. These nerve cells pass on the stimuli to your brain. This is why you can react to stimuli. The senses are in your eyes, ears, tongue, nose and skin. With these senses you can see, hear, taste, smell and feel. #### #### Correct stimulus Every sense has a stimulus it is sensitive to. So every sense has a correct stimulus.
| Sense | Stimulus
Sight | eyes | light
Hearing | ears | sound
Smell | nose | odors*
Taste | tongue | chemicals
Touch | skin | pressure
* An odor is a chemical suspended in the air, like a fart.

Now answer the following five questions.

Which word should be placed in the open space?

1. You recieve ... from your environment with the help of your senses.

A. stimuli

B. impulses

C. reflex

2. Senses bring the stimuli through the nerves to the ... .

A. brain

B. muscles

3. A fast reaction which you didn't need to think about is called a(n) ... .

A. impulse

B. reflex

C. stimulus

4. The ... from the sun is the correct stimulus for the eyes.

A. sound

B. smell

C. light

5. The odors in the classroom were picked up by my ... .

A. ears

B. nose

C. skin

When you have answered all the questions, make sure to compare your answers with a classmate. If there is an question you have answered differently, try and figure out who was right.