Scientists sometimes come up with theories out of the blue. ...

[stephzh]

Scientists sometimes come up with theories out of the blue.
 
  Indicate whether the statement is true or false

Question 2

Mental disorders can be the result of
 
  a) an abundance of receptors on the postsynaptic neuron.
  b) excesses of different neurotransmitters, such as dopamine.
  c) deficiencies in different neurotransmitters, such as serotonin.
  d) any of the above.

[dajones82]

Answer to Question 1

Muchas Gracias

Answer to Question 2

d