Stimuli lesson 4

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Stimuli lesson 4

  1. 1. Lesson 4: Stimuli Foundation Science SC 22101
  2. 2. We will Study Types of Responses to Stimuli…. What kind of animal is this? What is the stimulus it responds to?
  3. 3. Reflexes Guesses? Reflex – a response that happens fast and unconscious (unconscious = do not have to think) Examples of reflexes? Blinking, sneezing, knee jerk, pupil dilating, shivering Stimuli for these reflexes?
  4. 4. Reflexes Brain not used in reflex reactions – we don’t think about it! Why are reflexes so much faster than learned behaviors? The signals in nerves don’t have to travel to brain Reflex arc video…
  5. 5. List of Reflexes
  6. 6. Instincts Instincts – behaviors that are “programmed” into the DNA. Animals DO NOT learn instincts. Examples of instincts? -Birds fly south for the winter -Salmon find the way back to the same exact river they were born in -Baby snakes can catch insects right after they are born
  7. 7. What Stimuli Trigger Instincts? Our examples: Birds that fly south for winter – stimulus = amount of daylight (=time of year) Salmon find their way back to same river – stimulus = earth’s magnetic field and smell
  8. 8. Learned Behaviors Learned behaviors - come from practice or experience. Examples: -Teaching your dog to sit down when he hears the word “sit” (Stimulus?) -Seagulls following a fishing boat for food (Stimulus?)
  9. 9. Do You Now Know the Difference Between Instincts, Reflexes and Learned Behaviors? Instinct? Reflex? or Learned Behavior…….?
  10. 10. Questions 1. What is reaction time (we studied this in lab)? 2. What is the difference between an instinct and a reflex? 3. Give 3 examples of instinctive behaviors, and 3 examples of learned behaviors. 4. Give one example of an instinct in dogs. 5. What does unconscious mean? 6. Your reaction time for grabbing the ruler in lab was about 0.25 seconds. Do you think your reaction time when you touch a hot cup would be faster or slower? Why?

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