Chapter 5: Nervous Tissue Flashcards
Elongated cells with extremely fine processes
Nervous Tissue
What nervous tissue are in PNS?
All the nervous tissue outside CNS (brain &spinal cord)
Embryonic origin of nervous tissue
Ectoderm
Flat Cells encased by basal lamina found in neurilemmal sheath of the PNS
Schwann Cells
Every nerve fiber in the PNS is enveloped with this connective tissue
Endoneurium
What transport process is this: anterograde-perikaryon to axon terminals
: retrograde-axon terminals to perikaryon
Axonal Transport
rER in a perikaryon of a neuron is
Abundant in dendrites and absent in axon
Source of Microtubules of a neuron
centrosome
It is the majority of motor neurons
Multipolar
Conduct action potential towards the CNS
Sensory Neurons or Afferent Neurons
Conduct action potential away from CNS
Motor Neurons or Efferent Neurons
Point of contact between a neuron and another neuron
Synapse
Forms the blood-brain barrier in the CNS
Astrocytes
The counterpart of Satellite Cells found in the CNS
Astrocytes
Epithelium found in the ependymal cell
Simple Cuboidal Epithelium
These cells can be found along the surface ventricles of the brain and spinal cord
Ependymal Cells
The outermost layer of a peripheral nerve. The strongest connective tissue layer of the nerve
Epineurium
The enveloping membrane of the CNS made up of connective tissue
Meninges
Site for anesthesia
Epidural Space
COBWEB-LIKE connective tissue strands
Arachnoid Membrane
Connective tissue found in Dura Mater
Dense connective tissue
Epithelium found in Dura Mater
Simple Squamous Epithelium
Connective tissue fiber found in Pia Mater
Collagen and Elastic Fiber
Water cushion of CNS
CSF
Clear, Slightly viscous fluid circulates within the ventricles of the brain
CSF
Normally present in CSF
lymphocytes
Acts like a tube with a one-way valve that allows passage of CSF from subarachnoid space into the vein
Arachnoid villi
In ganglion, each neuron is surrounded by these supporting cells
satellite cells
A collection of cell bodies of neurons that have a common function in the PNS
Ganglion
The connective tissue found in epineurium
Dense Irregular connective tissue
The connective tissue found in endoneurium
Loose connective tissue
This is the counterpart of tracts in the CNS
Peripheral nerves
Immune function by removing bacteria and cell debris
microglial
Transmits action potentials from the CNS to skeletal muscles
Somatic
Autonomic Nervous System transmit action potentials from CNS to:
Cardiac and Smooth Muscle
Controls the activity of structures that are not under conscious control
autonomic efferent motor neurons
Responsible for constriction of pupil, slowing of heart rate and resting and relaxing situations
Parasympathetic Division of Autonomic nervous system
Responds to impending danger or stress and fight or flight situations
Sympathetic Division of Autonomic nervous system
A special nervous system found only in the digestive tract
Enteric
Conduct action potential
Nerve Cell
send and receive stimuli via neurotransmitters
Nerve Cell
Synapses
Nerve Cell
Nissl Bodies
Nerve Cell
Axon and Dendrite
Nerve Cell
Supportive Neuroglial Cells
Glial Cell
Astrocytes
Glial Cell
Microglial Cells
Glial Cell
Satellite Cells
Glial Cell