Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the...
-
Upload
joel-bailey -
Category
Documents
-
view
236 -
download
15
Transcript of Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the...
![Page 1: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/1.jpg)
Stimulus & Stimulus & Response Response
TEKS 7.13A investigate
how organisms respond to external
stimuli found in the
environment such as
phototropism and flight or
fight
TEKS 7.13B describe and
relate responses in organisms that may result from internal stimuli
such as wilting in plants and fever or vomiting in animals that allow them to
maintain balance
![Page 2: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/2.jpg)
StimulusAA change in organism’s change in organism’s
environmentenvironment
![Page 3: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/3.jpg)
Types of Stimuli A stimulus can either be external or internal.
External stimuli- come from factors found in the environment.
Examples- temperature, predators, presence of water or food, etc
Internal stimuli- come from factors within an organism
Examples- germs, dehydration, lack of energy, pain
![Page 4: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/4.jpg)
Stimulus
Is this stimulus external or internal?
![Page 5: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/5.jpg)
Response
An organisms reaction to change.
![Page 6: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/6.jpg)
Response
![Page 7: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/7.jpg)
HomeostasisHomeo- sameStasis- state of balance
The purpose of response to stimuli in organisms is to maintain homeostasis, a balance within it’s internal systems.
![Page 8: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/8.jpg)
ExamplesExamples
StimulusStimulus = =
Is this internal or external?Is this internal or external? ResponseResponse = =
StimulusStimulus = =
Is this internal or external?Is this internal or external? ResponseResponse = =
Lack of water
Wilting
Bacteria or Virus
Fever
![Page 9: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/9.jpg)
ExamplesExamples
StimulusStimulus = =
Is this internal or external?Is this internal or external? ResponseResponse = =
StimulusStimulus = =
Is this internal or external?Is this internal or external? ResponseResponse = =
Stomach virus
vomiting
Saber-tooth Tiger
Fight or flight
![Page 10: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/10.jpg)
Just as Just as animalsanimals respondrespond to the to the environment, environment, plantsplants do as do as well. well.
![Page 11: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/11.jpg)
TropismsTropisms Tropism Tropism = plant’s growth response = plant’s growth response
toward or away from a stimulustoward or away from a stimulus
![Page 12: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/12.jpg)
TropismsTropisms Tropism Tropism = plant’s growth response = plant’s growth response
toward or away from a stimulustoward or away from a stimulus
Positive tropismPositive tropism
Negative tropismNegative tropism
![Page 13: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/13.jpg)
TropismsTropisms Tropism Tropism = plant’s growth response = plant’s growth response
toward or away from a stimulustoward or away from a stimulus
Positive tropismPositive tropism = plant grows toward = plant grows toward a stimulusa stimulus
Negative tropismNegative tropism
![Page 14: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/14.jpg)
TropismsTropisms Tropism Tropism = plant’s growth response = plant’s growth response
toward or away from a stimulustoward or away from a stimulus
Positive tropismPositive tropism = plant grows toward = plant grows toward a stimulusa stimulus
Negative tropismNegative tropism = plant grows away = plant grows away from a stimulusfrom a stimulus
![Page 15: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/15.jpg)
HydrotropismHydrotropismHydrotropismHydrotropism = a plant’s = a plant’s
rootsroots grow toward watergrow toward water
Is this positive or negative?Is this positive or negative?
![Page 16: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/16.jpg)
PhototropismPlants grow toward a source of light
Animation:
http://botanical-online.com/animation8.htm
![Page 17: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/17.jpg)
Examples
![Page 18: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/18.jpg)
ThigmotropismA plant grows toward or away from pressure
Positive turns toward pressure
Negative turns away from pressure
![Page 19: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/19.jpg)
Geotropism A plant grows with or against gravity Also called Gravitropism
Negative- A plant’s stems or trunk grow up, against the pull of gravity.
Positive- A plant’s roots grow down, with the pull of gravity
Animation:
http://botanical-online.com/animation4.htm
![Page 20: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/20.jpg)
Regardless of the slope of the land, the tree grows up against gravity.
Regardless of the position a seed is planted in, the roots grow down with gravity and the stem up against gravity.
![Page 21: Stimulus & Response TEKS 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and flight or fight.](https://reader033.fdocuments.in/reader033/viewer/2022051214/56649d0d5503460f949e17e0/html5/thumbnails/21.jpg)
Working Together
Plant tropisms work together to maintain homeostasis within the plant
Plants in Motion Video
- geotropism
+ phototropism
+ geotropism
+ hydrotropism