5.1 stimuli and responses

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

https://www.bbc.co.uk/bitesize/topics/z9yycdm/articles/zxy987h

stimuli and responses

stimulus

sensory receptor

neurons

effectors

response

stimulus => response

stimulus = external or internal change

sensory receptors = convert stimuli into electrical signals

neurons = bring these signals to your brain (impulses)

effectors = are told how to react by your brain (via impulses through neurons)  that's your response

Give an example in your body of a stimulus and a response
For example: bell rings - get up from chair

Now give a complete example: stimulus-sensory receptor-neurons-effectors-response

responses

voluntary => you decide to react (skeletal muscle)

involuntary => you have no control over your reaction (smooth muscle that contracts, e.g. when you'r stomach starts to growl)

Senses

involuntary responses

effectors

muscles (fast response)

glands => hormones (slow response, via the blood)

difficult words

1 bombarded            gebombardeerd

2 to convert                omzetten

3 specialised                  gespecialiseerd

4 destination                  bestemming 

5.2 The senses

senses

vision - light rays

hearing - sound waves

smell - chemicals

taste - chemicals

feeling (pressure, temperature, pain and touch) - heat/cold etc.

difficult words

read the paragraph and write down 3 difficult words

We will choose 5 for your notebook

five difficult words

1. detectors                             detector/sensor

2. pleasant                        nice / fijn

3. receptors                       receptor, reads a stimuli and changes it into an impulse (electrical signal)

4. corrresponding                          matching/ correspondeert/ past erbij

5. internal/external                                inside/outside