Medical-Surgical Nursing Review Complete Summary pdf download for board examination.
An Overview of Nervous System Structures and Functions
Cells and Neuron
Characteristics and properties
a. The ability of a neuron’s excitability to be changed by the external environment.
b. The ability of a neuron’s conductivity to carry an excitation pulse from one neuron to another from one cell to the next
c. Permanent cells (heart, retina, etc.) cannot regenerate after they have been killed osteocytes, brain.
A. Labile — once destroyed, it is incapable of regeneration.
GIT cells, epidermal cells, resp (lung cells). GUT
B. Stable – capable of regeneration, but only for a short period of time (ex salivary glands Cells of the pancreas, liver cells, and kidney cells
C. Non-regenerative cells — retina, brain, heart, and osteocytes.