Suffolk Final Flashcards
Medical science that deals with functioning and disorders of the nervous system
Nuerology
The nervous system is responsible for all
Behaviors memories and movements
Three basic functions of the nervous system
Sensory
Interpretation
Motor response
Sensing changes with sensory receptors, detects internal and external environment
Sensory receptors
Analysis, interpreting and remembering changes with the sensory receptors
Interpretation
Reaction to changes with effectors
Motor response
Nervous system path overview
Receptor Sensory neuron Inter neuron Motor neuron Muscle
The brain and the spinal cord are part of the
Central nervous system
CNS
The cranial nerves
Spinal nerves
Ganglia
Peripheral nerves are all part of the
Peripheral nervous system
A bundle of hundreds or thousands of axons each of which courses along a defined path and serves a specific region of the body
Nerve
Located outside the brain and spinal cord are small masses of nervous tissue containing cell bodies of nuerons
Ganglia
Helps regulate the digestive system
Plexuses
Parts if neurons or specialized cells that minister changes in the external or internal environment
Sensory receptors
Neurons from cutaneous and special sensory receptors to the CNS
Motor neurons to skeletal muscle tissue
Somatic voluntary nervous system SNS
Sensory neurons from visceral organs to CNS
Motor neurons to smooth and cardiac muscle & glands
Autonomic involuntary nervous system
Sympathetic division of the autonomic nervous system
Speeds up heart rate
Parasympathetic division of the autonomic nervous system
Slows down heart rate
Involuntary sensory & motor neurons control GI tract
Neurons function independently of ANS and SNS
Enteric nervous system ENS
Consists of neurons in the plexusus that extend the length of GI tract
Enteric nervous system ENS
Sensory neurons of the ENS moniter chemical changes within the GI tract and stretching of its walls
.
Somatic nervous system pathway
SNS
CNS
Somatic motor nuerons
Skeletal muscle
ANS autonomic nervous system pathway
ANS
CNS
autonomic neurons sympathetic or parasympathetic
Smooth muscle, cardiac muscle and glands
ENS enteric nervous system path
ENS
CNS
enteric motor neurons in enteric plexusus
Smooth muscles, glands, cells of GI tract
What is the functional unit of the nervous system
Neurons
Glue that supports and maintains the neuronal networks and also outnumber neurons
Neuroglia
Cytoplasm of the neuron is called
Perikaryon
Mitochondria produces
Energy
RER in ribosomes in the neuron produce
Neurotransmitters
Cytoskeleton of a neuron consist of
Neurofilaments
Neurotubules
Neurofibrils
Bundles of neurofilaments that provide support for dendrites and axon
Neurofibrils
Makes neural tissue appear grAy
dense area of RER and ribosomes
Nissl bodies
Axon structure is critical to
Function
Cytoplasm of axon that contains neurotubules neurofibrils and enzymes
axoplasm
Covers the axoplasm
Axolemma