__________________________ Any one of a number of characteristics of line determined by its weight, direction, uniformity or other features.

__________________________ A surface impenetrable by light.

__________________________Subtle colors that result from dulling prismatic colors down considerably.

Neurotransmitters are released from which portion of the neuron?

Oligodendrocytes are found in the CNS and Schwann cells are found in the PNS. 

Which of the following is the correct order of events involved in an action potential within a neuron?

Which plexus gives rise to the phrenic nerve that innervates the diaphragm?

Which of the following would not be considered a general sense?

Which neurotransmitter is used as a reward mechanism and is also involved in Parkinson’s Disease?

Which layer of the meninges is the outermost layer?