Chap. 8 A&P Nervous System Flashcards
The brain and spinal cord are part of the
Centeal nervous system
The peripheral nervous system is composed primarily of the dendrites of sensory neurons and axons of
Motor neurons
Three membranes surrounding and protecting the spinal cord are called
Meninges
The ventral roots of the spinal cord contains axons of
Motor neurons
The brain receives impulses from spinal cord as well as
12 pairs of Cranial nerves
The peripheral nervous system has sensory receptors located in
Sensory organs
In the PNS, glial cells that wrap themselves around neurons are
Schwann cells
Star shaped glial cells with cytoplasm extended into elongated processes to form the blood brain barrier called
Astrocytes
Impulses are conducted away from the cell body by a long extension called
Axon
Chemical substances released at the axon terminals are referred to as
Neurotransmitters
The nervous system is composed of 2 systems
Neurons ( nerve cells)
Axon
What is acetycholine
Neurotransmitter
What is an astrocyte
Type of neuron ( blood brain barrier) keep neurons in place
Central nervous system CNS
Neck up
12 cranial nerves
33 pairs of spinal nerves
3 types of meninges
Duramater ( outer layer)
Arachnoid ( web like layer)
Pia mater ( thin, most inner)
