The Spinal Cord

Question 0

Dorsal Root nerves

Answer 0

soma in Dorsal Ganglia outside the cord

carry info from body to brain

Question 1

The Spinal Cord

Answer 1

CNS

31 segments, and each segment has:

  - 1 pair afferent Dorsal Root nerves and 1 pair efferent Ventral Root nerves 
  - Bell Magendie Law 
  - grey matter, white matter, central canal

Question 2

Ventral Root nerves

Answer 2

soma in the Cord

carry motor info to muscles and glands

Question 3

Bell-Magendie Law

for sense organs and muscles in the head?

Answer 3

Sensory info IN via Dorsal Roots, motor info OUT via Ventral Roots

NOTE: for sense organs and muscles in the head, CRANIAL NERVES of PNS serve this function

Question 4

In horizontal cross section one can see:

Answer 4

Bones and Meninges that surround and protect nervous tissue

Question 5

Grey Matter

Answer 5

Somas and dendrites, including inter-neurons, in CENTER of Spinal Cord

Question 6

White Matter

Answer 6

mainly myelinated axons, ascending and descending tracts to/from Brain

surround Grey Matter

Question 7

Central Canal

Answer 7

hollow space, runs down the center of the cord,

filled with Cerebral Spinal Fluid (CSF)