Stem cells that can form all types of lymphocytes are ...

[stevenposner]

Stem cells that can form all types of lymphocytes are concentrated in the
 A) circulation.
  B) thymus.
  C) red bone marrow.
  D) spleen.
  E) yellow marrow.

Question 2

Using the two-point discrimination test you can fairly accurately determine whether you have been touched with one point or two because of the density of the
 A) effectors.
  B) perception.
  C) labeled line.
  D) receptor fields.
  E) action potential.

[elizabethrperez]

Answer to Question 1

C

Answer to Question 2

D

[stevenposner]

Excellent

[daiying98]

Thanks for the timely response, appreciate it