Lesson 1: The nervous system

Get ready
-LessonUp
1 / 20
next
Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 2

This lesson contains 20 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 45 min

Items in this lesson

Get ready
-LessonUp

Slide 1 - Slide

Brain and Senses
Lesson 1: Neurons and the brain








Slide 2 - Slide

How do you detect and respond to changes? 
  • Nervous system: electrical messages
  • Hormonal system: chemical messages


Slide 3 - Slide

Getting a reaction
-Stimuli (a change that can be detected)

-Receptors (detect changes)

-Effectors (bring about a response)

Slide 4 - Slide

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

Slide 5 - Slide

The Nervous system
The nervous system controls your muscles 
-walk / write / exercise 
-swallowing / blinking / breathing

-Central nervous system vs. 
-Peripheral nervous system


Slide 6 - Slide

The central nervous system (CNS)

Slide 7 - Slide

Nerve cells / neurons 
  • Sense organs (receptors) send messages to the CNS
via Sensory neurons

  • Muscles and glands (effectors) CNS send messages telling them wat to do 
via Motor neurons

Slide 8 - Slide

Slide 9 - Slide

Slide 10 - Slide

The message
-Nerve impulses (electrical signals)
-Via the axon of the nerve cell
-Fatty sheat around axons make the impuls travel faster


-Multiple slerosis (MS) the fatty sheat breaks down they lose their use of the muscles 

Slide 11 - Slide

Reflex (en reflexboog)
Reflexboog


Reflex

Slide 12 - Slide

Slide 13 - Slide

You get an itch in your elbow. What is the stimulus in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow

Slide 14 - Quiz

You get an itch in your elbow. What is the response in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow

Slide 15 - Quiz

You get an itch in your elbow. What is the coordinator in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow

Slide 16 - Quiz

You get an itch in your elbow. What is the receptor in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow

Slide 17 - Quiz

Which will send a message along sensory neurons?
A
Receptors in your skin
B
The spinal cord
C
The muscles in your arm
D
The brain

Slide 18 - Quiz

Which will receive a message by motor neurons?
A
Receptors in your skin
B
The spinal cord
C
The muscles in your arm
D
The brain

Slide 19 - Quiz

Slide 20 - Video