Chapter 12
The Brain and Spinal Cord are a part of which Nervous system?
Central Nervous system
Which neuroglia produce Myelin Sheaths in the PNS?
Shwann Cells
Which bony structure encircles the spinal cord?
Vertebral column
The brain contains _____________ neurons
85 billion
The connective tissue covering that encircles an ENTIRE nerve is known as:
Epineurium
Which nervous system is known as Involuntary and why?
Autonomic Nervous system and Enteric Plexus
Neuroglia are ____ to _____ times more numerous than Neurons
5 to 25 times
What are the 3 layers of meninges?
Dura Mater, Arachnoid Mater, Pia Mater
list the 3 basic functions of the nervous system:
sensory function, integrative function, motor function
What is the name of the large slit on the anterior portion of the Spinal cord
Anterior median fissure
Which specific nervous system conducts impulses to skeletal muscles only?
Somatic Nervous System
Which section of a neuron is the receiving portion( input portion) of a neuron?
Dendrite
what are the 2 spinal cord enlargements, and what arises from them?
Cervical and lumbosacral, the nerves from the limbs arise from these enlargements
list the structural classifications of neurons
Multipolar, Bipolar, Unipolar
Which autoimmune disorder Detroys myelin sheaths?
MS
How many Cranial nerves emerge from the brain?
12 pairs, or 24
the ________________ contains tiny membrane enclosed sacs called synaptic vesicles that store neurotransmitters.
Synaptic End Bulbs
C7-T1
List the factors that affect the speed of propagation
Amount of myelination, Axon diameter, temperature
the region where communication occurs between 2 neurons is known as a:
Synapse
List the components of the PNS (4 Things)
Nerves, Ganglia, Enteric Plexus, Sensory Receptors
List all Neuroglia from the CNS and all Neuroglia in the PNS
Astrocytes, oligodendrocytes, microglial cells, ependymal cells (CNS)
Schwann cells, Satellite Cells ( PNS)
What liquid encircles the brain and spinal cord?
Cerebrospinal fluid
List the neural circuits:
Simple series, diverging, converging, reverberating, parallel after discharge
The nervous system is one of the smallest and most complex, it has a mass of about _______ kgs.
2 Kgs