A key contribution of Hermann von Helmholtz to the study of ...

[audragclark]

A key contribution of Hermann von Helmholtz to the study of neuron function was
 
  A) a mathematical formula to describe the conservation of energy.
  B) a theory of black-white vision.
  C) his invention of the ophthalmoscope.
  D) measuring the conduction speed through nerves of the action potential.
  E) his creation of the ablation method.

Question 2

Electrical stimulation of the ________ in dogs was shown by Fritsch and Hitzig in 1870 to result in ________.
 
  A) pineal gland; contraction of the facial muscles
  B) parietal cortex; the sensation of high frequency sound
  C) corpus callosum; paralysis of both hind legs
  D) primary motor cortex; muscle contraction on the opposite side of the body
  E) left globus pallidus; atrophy of muscles on the right side of the body

[Perkypinki]

Answer to Question 1

Answer: D
Rationale: A key contribution of Hermann von Helmholtz to the study of neuron function was his measurement of the conduction speed through nerves of the action potential.

Answer to Question 2

Answer: D

[audragclark]

Thanks for the timely response, appreciate it

[dyrone]

Great answer, keep it coming