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Author Question: Parkinson's disease is caused by degeneration of a pathway of neurons that releases which ... (Read 83 times)

geoffrey

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on: Jun 22, 2018
Parkinson's disease is caused by degeneration of a pathway of neurons that releases which neurotransmitter?
 
  a. acetylcholine
  b. substance P
 c. serotonin
 d. dopamine

Question 2

An adult male sparrow sings its normal song ____.
 
  a. if he hears the song during a sensitive period early in his life
 b. only when he hears a female bird singing
 c. if his own species' song is the first song he hears when young
 d. regardless of whether or not he has ever heard his species' song from another bird


ttt030911

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Reply #1 on: Jun 22, 2018
Answer to Question 1

d

Answer to Question 2

a


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geoffrey

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Reply #2 on: Jun 22, 2018
Thank you!


ttt030911

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Reply #3 on: Jun 22, 2018
Happy to help


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