NEURO01 Flashcards
(80 cards)
Is made up of vast neural networks; signaling enables thinking, language, feeling, learning, memory and all function and sensation
NERVOUS SYSTEM
What are the components of the nervous system?
CENTRAL NERVOUS SYSTEM
PERIPHERAL NERVOUS SYSTEM
Consists of the brain and spinal cord
CNS
Consist of 12 pairs of cranial nerves and 31 pairs of spinal nerves
PNS
What are the 2 division of the peripheral nerves?
SOMATIC DIVISION
AUTONOMIC DIVISION
Division of the peripheral nerves that communicates with the skin and skeletal muscles
SOMATIC DIVISION
Division of the peripheral nerves thaat communicates with the smooth muscles, heart muscle, and glands
AUTONOMIC DIVISION
What are the cells of the nervous system?
NEURON
MYELIN SHEATH
SCHWANN CELL
NODES OF RANVIER
AXONAL TERMINAL
ACTION POTENTIAL IN THE NS
Receives impulses to and from the brain
NEURON
Small tree-like structures that receive electrochemical messages
DENDRITE
Spherical that enclose and protect the nucleus, most of which are located within the CNS
CELL BODY
Long transmitting processes that carry electrical impulses away from the cell body
AXON
What are the parts of the neuron?
NUCLEUS/CELL BODY
DENDRITE
AXON
SHCWANN CELLZ
NODE OF RANVIER
AXON TERMINALS
ETC.
Types of neuroglia in the CNS?
ASTROCYTES
EPENDYMAL CELLS
MICROGLIA
OLIGODENDROCYTES
Have numerous processes that give the cell a starshaped appearance. They maintain the ion balance around neurons and control the exchange of materials between blood vessels and neurons
ASTROCYTES
Line the fluidfilled cavities of the brain and spinal cord
EPENDYMAL CELLS
Are phagocytic macrophages that provide a protective function by engulfing microorganisms and cellular debris
MICROGLIA
Have fewer processes than astrocytes. They wrap these cytoplasmic processes around neurons to create an insulating barrier called myelin sheath
OLIGODENDROCYTES
A white lilid substance that surrounds the axon of some nerve cells, forming an electrically insulating layer.
MYELIN SHEATH
Production of myelin sheath is called?
MYELINATION
In the PNS, produces the myelin sheath around neuronal axons
SCHWANN CELL
Periodic gap in the insulating sheath on the axon of certain neurons that serves to facilitate the rapid conduction of the nerve impulses
NODES OF RANVIER
Specialized to release the neurotransmitters of the presynaptic cell
AXONAL TERMINAL
Impulses that allow a neuron to communicate with other neurons and body cells
ACTION POTENTIAL IN THE NS