Stimulus And Response

1. Stimulus and ResponseStimulus and Response
Why animals and plants do what they do Why animals and plants do what they do
OROR
A fancy way of saying A fancy way of saying causecause and and effecteffect in in
the animal world.the animal world.

2. CatalystCatalyst
1. Describe a situation in which you were 1. Describe a situation in which you were
immediately scared and/or reacted immediately scared and/or reacted
quickly to something. Write at least 1 quickly to something. Write at least 1
paragraph with 4 sentences describing paragraph with 4 sentences describing
your experience.your experience.
2. Take out your vocab books and your 2. Take out your vocab books and your
colors.colors.
3. Take out your dry erase board.3. Take out your dry erase board.

3. After today you will be able to:After today you will be able to:
1. Identify and classify stimuli as 1. Identify and classify stimuli as
internal or externalinternal or external
2. Define a response.2. Define a response.
3. Identify behavior as learned 3. Identify behavior as learned
behavior or instinct.behavior or instinct.

4. What is a stimulus?What is a stimulus?
Stimulus:Stimulus: any change in an organism’s any change in an organism’s
environment that causes to the environment that causes to the
organism to react. organism to react. It is a fancy way of It is a fancy way of
saying “cause”.saying “cause”.
StimulusStimulus – singular – singular
StimuliStimuli – plural – plural
Example: An animal is cold so it moves into the sun.Example: An animal is cold so it moves into the sun.
(Add this word to your vocabulary book)(Add this word to your vocabulary book)

5. What is a response?What is a response?
Response:Response: how the organism reacts how the organism reacts
to a stimulus and results in a to a stimulus and results in a
change in behavior.change in behavior. It is a fancy It is a fancy
way of saying “effect”.way of saying “effect”.
Example: Getting a drink when you are Example: Getting a drink when you are
thirsty.thirsty.
(Add this word to your vocabulary book)(Add this word to your vocabulary book)

6. Examples of stimuli and their Examples of stimuli and their
responses:responses:
•You are hungry so you eat some foodYou are hungry so you eat some food
•A rabbit gets scared so it runs awayA rabbit gets scared so it runs away
•You are cold so you put on a jacketYou are cold so you put on a jacket
•A dog is hot so lies in the shadeA dog is hot so lies in the shade
•It starts raining so you take out an It starts raining so you take out an
umbrellaumbrella

7. Plants also respond to their Plants also respond to their
environment. When a plant grows environment. When a plant grows
towards the sun we call this towards the sun we call this
phototropismphototropism..

8. Think – Pair - ShareThink – Pair - Share
Turn to your partner and Turn to your partner and
share two other stimuli share two other stimuli
and their responses. and their responses.

9. There are two types of stimuli:There are two types of stimuli:
External StimuliExternal Stimuli
andand
Internal StimuliInternal Stimuli

10. External StimulusExternal Stimulus
External stimulus: a stimulus that comes External stimulus: a stimulus that comes
from outside an organism.from outside an organism.
Examples: Examples:
1. You feel cold so you put on a jacket.1. You feel cold so you put on a jacket.
2. A snake lunges at a rabbit so it runs away.2. A snake lunges at a rabbit so it runs away.
3. A dog feels hot so it goes to lay in the shade.3. A dog feels hot so it goes to lay in the shade.
Add this word to your vocabulary book.Add this word to your vocabulary book.

11. Internal StimulusInternal Stimulus
Internal stimulus:Internal stimulus: a stimulus that comes a stimulus that comes
from inside an organism.from inside an organism.
Examples: Examples:
1. You feel hungry so you eat some food.1. You feel hungry so you eat some food.
2. A cat feels thirsty so it drinks water.2. A cat feels thirsty so it drinks water.
3. A dog feels hot so it goes to lay in the shade.3. A dog feels hot so it goes to lay in the shade.
Add this word to your vocabulary book.Add this word to your vocabulary book.

12. Make a T-chart on your dry erase board and label Make a T-chart on your dry erase board and label
the columns the columns internalinternal and and externalexternal. Put the letter . Put the letter
of each stimulus in the proper column. of each stimulus in the proper column.
A.A.You have a stomach ache and decide to You have a stomach ache and decide to
lay down.lay down.
B.B.A bird is thirsty and drinks some water.A bird is thirsty and drinks some water.
C.C.A squirrel sees a cat and runs up a tree.A squirrel sees a cat and runs up a tree.
D.D.A lion gets hungry and eats a gazelle.A lion gets hungry and eats a gazelle.
E.E.You see a spider and scream.You see a spider and scream.

13. Animals can respond to stimuli in Animals can respond to stimuli in
two ways:two ways:
1. In a way that they learned. We call this 1. In a way that they learned. We call this
learned behavior.learned behavior.
OROR
2. In a way that they were just born 2. In a way that they were just born
knowing how to do. We call this knowing how to do. We call this instinct.instinct.

14. Learned behavior:Learned behavior: a a
response to a stimulus response to a stimulus
that an animal was that an animal was
taught.taught.
Add this word to your vocabulary bookAdd this word to your vocabulary book

15. A mother bear teaching her cubs to A mother bear teaching her cubs to
fishfish

16. Teaching an animal a trickTeaching an animal a trick

17. Training a dogTraining a dog

18. Even Even youyou have learned behavior. have learned behavior.
For example, you learned to read For example, you learned to read
and to talk.and to talk.

19. Instinct:Instinct: an animal’s natural an animal’s natural
reaction to a stimulus. It is reaction to a stimulus. It is
an automatic reaction that an automatic reaction that
the animal was not taught to the animal was not taught to
do.do.
Add this word to your vocabulary bookAdd this word to your vocabulary book

20. Animals natural instinct is to run Animals natural instinct is to run
away from danger. We call this the away from danger. We call this the
need for safety. need for safety.

21. Animals will naturally find or make Animals will naturally find or make
themselves a home because they themselves a home because they
have a need for shelter. have a need for shelter.

22. Animals will naturally look for food Animals will naturally look for food
and water. and water.

23. Animals that need to will naturally Animals that need to will naturally
migrate. migrate.

24. Animals instinctually know to store Animals instinctually know to store
their food for the winter.their food for the winter.

25. Think – Write - ShareThink – Write - Share
On your board write down one On your board write down one
learned behavior that you have an learned behavior that you have an
one instinct that you have.one instinct that you have.

26. Summarize what you have learned today. On a Summarize what you have learned today. On a
sheet of NBP answer the following questions.sheet of NBP answer the following questions.
1.1.What is a stimulus?What is a stimulus?
2.2.What is a response?What is a response?
3.3.Give one example of a stimulus and its response.Give one example of a stimulus and its response.
4.4.What is an internal stimulus?What is an internal stimulus?
5.5.What is an external stimulus?What is an external stimulus?
6.6.It is raining and you open up an umbrella. Is this It is raining and you open up an umbrella. Is this
an internal or external response? Justify your an internal or external response? Justify your
answer. answer.
7.7.What is learned behavior?What is learned behavior?
8.8.What is an instinct?What is an instinct?
9.9.When a rabbit runs away from a wolf is this When a rabbit runs away from a wolf is this
learned behavior or instinct? Justify your answerlearned behavior or instinct? Justify your answer..