Lesson 1: The nervous system

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Get ready

-LessonUp

Brain and Senses

Lesson 1: Neurons and the brain

Chapter 8: Kerboodle:  'Control and coordination' 

-Page 108 t/m 111

How do you detect and respond to changes? 

• Nervous system: electrical messages
• Hormonal system: chemical messages

Getting a reaction

-Stimuli (a change that can be detected)

-Receptors (detect changes)

-Effectors (bring about a response)

An example 

Throwing a pen towards someone 

• Stimuli --> the pen coming towards you 
• Receptors --> retina of your eye 'seeing' the pen 
• Effectors --> muscles in your arm to catch the pen

You get an itch in your elbow. What is the coordinator in this reaction?

1. Receptors in your skin
2. The itch itself
3. muscles that move your arm to scratch
4. The brain that decides to scratch the elbow

You get an itch in your elbow. What is the receptor in this reaction?

1. Receptors in your skin
2. The itch itself
3. muscles that move your arm to scratch
4. The brain that decides to scratch the elbow

HW for next lesson 

Hw for lesson 3: 

Complete the worksheet on classroom