External and Internal Stimuli
Contributed by: Flanagan

  • 1. When there is a lack of resources, what do birds do to respond?
A) reproduce
B) migrate
C) hide
D) hibernation
  • 2. A stimulus that comes from the outside of an organism is a/an
A) external stimulus
B) additor
C) internal stimulus
D) maternal stimulus
  • 3. All of the following are examples of an external stimulus except
A) a loud sound
B) hunger
C) lack of food
D) sunlight
  • 4. The process of plants growing towards sunlight is called
A) antitropism
B) photosynthesis
C) phototropism
D) gravotrpism
  • 5. An example of an internal stimulus is
A) light
B) noise
C) thirst
D) temperature
  • 6. Exposure to a really bright light is a/an
A) internal stimulus
B) external stimulus
  • 7. Getting a fever when you are sick is an example of a/an
A) external stimulus
B) internal stimulus
  • 8. When you vomit after ingesting bacteria because of food poisoning, your body has responded to a/an
A) internal stimulus
B) external stimulus
  • 9. When you develop goose bumps after being exposed to cold temperature, it is an example of a/an
A) internal stimulus
B) external stimulus
  • 10. A signal that causes an organism to react in some way is called a/an
A) stimulus
B) message
C) idea
D) response
  • 11. A cat hisses when it sees a dog. The hissing is an example of
A) a stimulus
B) courtship behavior
C) a circadian rhythm
D) s response
  • 12. You are going to perform an experiment to test which type of surface, wood bark or artificial grass, you new pet snake prefers. 1) What type of stimulus are you testing, internal or external? 2) Develop a list of materials you will need for your experiment. 3) Write a procedure to test the two variables to see which surface your new pet snake prefers.
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Answer Key

1.B   2.A   3.B   4.C   5.C   6.B   7.B   8.A   9.B   10.A   11.A   12.   

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