Author Question: In his studies of nerve conduction, Hermann von Helmholtz noted that A) electrical signal speeds ... (Read 221 times)

savannahhooper

  • Hero Member
  • *****
  • Posts: 576
In his studies of nerve conduction, Hermann von Helmholtz noted that
 
  A) electrical signal speeds differ from nerve to nerve.
  B) nerve signal conduction is at the speed of light.
  C) nerves conduct signals faster than do electrical wires.
  D) nerves conduct signals more slowly than wires conduct electricity.
  E) different sensory systems use different conduction speeds.

Question 2

Based on his observation of brain damage and behavioral difficulties in a stroke victim, Paul Broca concluded that
 
  A) the control of speech is a function of the left hemisphere.
  B) the right hemisphere controls motor movements on the right side of the body.
  C) damage to the right hemisphere impairs speech.
  D) different regions of the brain control heart rate and breathing, purposeful movements, and sensory function.
  E) muscle atrophy after a stroke results from a loss of fluid pressure within the brain ventricles.



ASDFGJLO

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

Answer: D
Rationale: In his studies of nerve conduction, Hermann von Helmholtz noted that nerves conduct signals more slowly than wires conduct electricity.

Answer to Question 2

Answer: A
Rationale: Based on his observation of brain damage and behavioral difficulties in a stroke victim, Paul Broca concluded that the control of speech is a function of the left hemisphere.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

For a complete list of videos, visit our video library