A blue color around the lips from a lack of oxygen in the tissues is called ________.

In the peripheral nervous system, axon regeneration is:

a. Possible due to chemical cues from Schwann cells b. Impossible due to genetic factors within the neurons c. Impossible due to blocking by the endoneurium d. Possible but very rare

Urine should be:

A) very alkaline B) slightly alkaline C) very acidic D) slightly acidic