5.9 Neurons 1HVTTO

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

5.9 Neurons

• Jacket in your locker
• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor
  
• Read pages 

Lessongoals

• Understand: I can explain what a neuron is and describe its parts by correctly naming and identifying their functions.
  
• Remember: I can name the 3 types of neurons and describe what they do by identifying their roles in transmitting impulses.
  
• Remember: I can explain what a nerve is by describing how it connects different parts of the body.
  
• Understand: I can explain what a reflex is and how it works by describing the pathway of a reflex arc.

Homework 5.9

Asgmt 45-59

Secret Student

This lesson, I have randomly picked someone to be the secret student.

I pay special attention to:

• Your use of English
• Your participation in the lesson

At the end I will reveal the secret student, If I can give them positive feedback, they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Rewards

• +1 cm2 cheatsheet = you get to make a cheatsheet for a test. This starts being 1 by 1 cm. Everytime you earn this it gets 1 cm bigger to a max of 4 by 4 cm.
• 1/3 +0.5 = If you earn this 3 times you get to add 0,5 to one of your biology marks.
• Snitch = You can pick a classmate who also is checked for homework, you earn two V's (having 3 earns you a 1/3 +0,5)
• Too bad = You only get one V
  

penalties

• 45 min extra worktime = you need to come after school and do homework, this will last for 45 min or until the task is done
• Coloringpage = You get to pick a coloringpage, You need to color it and perform tasks that might be on it. You need to hand it in during the next lesson, If you don't you get 2 marks.
• 2/1 marks = a mark is an X, if you get 3 of these you will automaticly earn the 45 min extra worktime.
• Snitch = You can pick a classmate who also is checked for homework
• Lucky! = You don't get a penalty

You use your arm to pick up a glass
How does the impulse travel in your body?

1. muscle > nerve > spinal cord > brain
2. brain > spinal cord > nerve > muscle
3. brain > nerve > spinal cord > muscle
4. muscle > spinal cord > nerve > brain

The nerves in our bodies are part of the ..?.. nervous system.
(1 word)

You touch the glass, and you feel that it is cold.
How does the impulse travel in your body?

1. skin > nerve > spinal cord > brain
2. brain > spinal cord > nerve > skin
3. skin > spinal cord > nerve > brain
4. skin > brain > spinal cord > nerve

Alphabet: Think-Pair-Share

• Think: Work on the assignment on your own.
• Write all the letters of the alphabet in your notebook in 3 rows
• Use each letter to write the name of a thing we can do, that would not be possible without nerves and impulses

• Pair: Discuss and compare with your neighbour, improve your answer
• Share: Talk about given answers during plenary session.

taking in impulses from your senses

Making muscles move

Making glands produce substances

Nerve cell

• 1 nerve contains many nerve cells
• Dendrites receive impulses
• Axons send impulses away
• 3 types of nerve cell

Sensory neuron

• Attached to a sensory receptor(SR) in a sensory organ
• Sends impulses from SR to central nervous system

S

Motor neuron

• Attached to effectors (like muscles and glands)
• Sends impulses from central nervous system to effector

M

Interneuron

• Part of the central nervous system, 
• Most of your brain and spinal cord neurons are interneurons
• Connect other neurons

I

Dendrite

Small protrusions (= a thing that sticks out from a place or surface) of the cell body.

They receive impulses from other neurons

Axon

Long protrusion (= a thing that sticks out from a place or surface) of the cell body.

They send impulses away to other neurons/organs

Reflex arc

Conscious reaction = voluntary, 

                                      brain decides how to react     

Reflex = involuntary, fixed and fast reaction

                  to stimulus

This is a part of the spinal cord found inside the vertebrae

Reflex arc

A reflex arc is a shorter route impulses take during a reflex.

This allows you to react quickly in dangerous situations.

Conscious reaction

Sensory receptor > sensory neuron > spinal cord (interneurons) > brain (interneurons) decides what to do with impulse > spinal cord (interneurons) > motor neuron > effector

Sometimes the brain will decide no response is necessary. 

Reflex

Sensory receptor > sensory neuron > spinal cord (interneuron) > motor neuron > effector

Impulses will also be sent to the brain, but these arive later than the ones going to an effector.

Suddenly a bright light is shining in your eyes,
your pupils become smaller.

1. Reflex
2. Conscious reaction

Someone suddenly claps loudly,
you close your eyes for a short moment.

1. Reflex
2. Conscious reaction

Someone suddenly throws a small ball your way. Without too much trouble,
you manage to catch the ball.

1. Reflex
2. Conscious reaction

You want to step underneath the shower, but notice it's hot.
You feel a short shock, but then still step underneath.

1. Reflex
2. Conscious reaction
3. Reflex then conscious reaction
4. Concious reaction then reflex

What you should do: 5.9

• Pages  TB 136-139
• Asgmt  45-59, (57, 58) WB pgs 141-147

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do: 5.9

• Pages TB 136-139
• Asgmt 45-59, (57, 58) WB pgs 141-147

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Reflexes are much more important to animals than to humans. Plants don't even have them.
Explain: a. Why are reflexes more important to animals?
b. Why do plants not have them?

Secret Student

The secret student was .......

I paid special attention to:

• Your use of English
• Your participation in the lesson

If I can give them positive feedback, 

they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Tidy Duty

3 people each lesson

• Desks: empty and straight
• Chairs:  underneath the desks OR end of day: on the desks
• Floor: no rubbish