Axons of intrasegmental neurons ascend or descend the white matter of the spinal cord to terminate in segments superior or inferior to the segment containing the cell body

The cervical plexus innervates structures located in the:

a. Neck b. Abdomen c. Upper limbs d. Back

Cyanosis of the skin is caused by:

A. venous vasoconstriction. B. decreased blood oxygen. C. increased blood oxygen. D. peripheral vasodilation.