The nervous system

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Welcome everyone!

Today:

New chapter: Senses, TB p. 136

Explanation about nervous system

Making exercises 

What is a sense?

Which senses do we have?

Well known senses

What are we going to learn to day?

Today we will be learning:

How we perceive the world around us. 

What the nervous system consists of. 

How the nervous system generally works. 

Senses

The things we can observe around us are called stimuli. There are different kinds of stimuli, and every sensory organ/receptor reacts to a different stimulus. Sensory organs are built to convert a stimulus to an impulse; electrical current through your nervous system. An impuls goes to the brains, where it gets processed so you can observe everything that is around you. 

Different senses

Nervous system

The nervous system, just like your endocrine system makes sure communication within your body takes place. 

It has 2 parts: the central nervous system and the peripheral nervous system. 

Receptor --> effector 

Neurones

While the cell body are always in or around the CNS, the shoots of neurones can get very long. 

Impulse frequency 

Neurones

Neurones pass a impuls within each other through a synapse where a certain chemical (neurotransmitter) flows through. 

Neurotransmitters

Get to work!

The homework for next week are the exercises of page 45 of the workbook and the corresponding exercises of the textbook.