1. Name parts of the organs involve in the reflex arc * **
***
Name parts of the organs involve in the reflex arc
Describe how a reflex arc keeps us safe
Explain what is happening in the reflex arc

2. Testing your reflexes

3. Check your pupillary reflex by looking at your pupils in a mirror, noting the size.
Dim the lights for two to three minutes.
Turn on the lights and reexamine your pupils in the mirror, noting their size.
Normally, pupils get smaller when the lights are turned on because they contract to keep out excessive light that may temporarily blind you or damage your eyes.

4. Test your blink reflex by looking into a mirror.
Bring your right palm toward your right eye quickly, stopping just short of making contact with your face.
Repeat with the left palm and the left eye.
Note if you did not blink.

5. Relax the fingers on your right hand completely to test the Hoffman response.
Use the thumbnail on your left hand to press down on each of the fingernails of your right hand until your nail "clicks" over the end of each nail on your right hand.
Repeat the exercise with the right thumbnail, checking each of the fingernails on the left hand.
Note any discrepancies between fingers or hands. A lack of response is normal, according to the New York University website.
Note an abnormal response, which is if your fingers flex after the click.

6. Check your plantar or Babinski reflex by sitting on a table with your legs hanging over the edge and your socks removed.
Rub the end of the reflex hammer or an object like a key, up and down your bare foot from heel to big toe.
Look for a slight flexing of your toes.
Note any abnormal response, such as your toes separating or extending.

7. Click on the
sensory neurone A C E D B F

8. Click on the
spinal cord A C E D B F

9. Click on the
stimulus A C E D B F

10. Click on the
motor neurone A C E D B F

11. Click on the
effector A C E D B F

12. Click on the
receptor A C E D B F

13. Well done!

15. Relay neuron
Sense organ
Sensory neurone
Motor neuron
Muscle

16. Questions Are messages involved in reflexes fast or slow?
Do the messages go all over the body or just to specific parts?
How do the messages travel around the body?
Is it easy to repair faulty nerves and reflexes? Can we give drugs in most cases of nerve failure?
Imagine Andrew touched a hot Bunsen burner. Explain what is happening and why it happens

17. B1 Reflex: Acting without thinking
Task
Imagine that you jump in response to a loud noise while watching a scary movie.
Use diagrams and a flow chart to show what happens in the body when it reacts suddenly.
Include:
The job of the brain, nervous system and reflexes.
A flow diagram (model) to describe or explain a reflex arc.
Include a diagram that shows the structure and function of a neurone.

18. B1 Reflex: Acting without thinking
Progress through assessment
Draft
Read the Grade Ladder
Attempt Task - aim for Target Grade
Assessment
Self, Peer or Teacher assessment
Identify 1 or 2 improvement targets
Improvement
Make improvement(s)
Teacher Assessment

19. When watching a scary movie and something unexpected happens, like a loud noise, we often ‘jump’. This is because our body responds to our surroundings.
Can you explain what happens inside our body when we react in this way?

20. Flow Diagrams B1 Reflex: Acting without thinking
Tips for attempting this task
Flow Diagrams
Use the boxes to show each stage
Label the arrows to show what links each stage
e.g. stimulus
e.g. sensory neurone

21. B1 Reflex: Acting without thinking
Towards C Grade Target
KEY WORDS stimulus sensory neurone relay neurone synapses stimuli effector response
When you let go of a hot pan...
What is the stimulus?
What is the response?
What is the effector?
D. Put the key words in order to show a reflex arc.

22. Beyond C Grade KEY WORDS stimulus sensory neurone relay neurone
B1 Reflex: Acting without thinking
Beyond C Grade
Beyond C Grade
KEY WORDS
stimulus
sensory neurone
relay neurone
synapses
stimuli
effector
response
Label the neurone.
Identify where a synapse occurs.
Put the key words in order to show a reflex arc.