Nervous System Flashcards
Types of Nervous System
CNS AND PNS
CNS
Consist of the Brain and Spinal cord
PNS
All nervous outside of CNS: nerves, ganglia, enteric plexuses, and sensory receptors.
“bundle of hundreds to thousands of axons”
Nerves
“collection of Neuron cell bodies located outside of the Brain and spinal cord”
Ganglia
“extensive network of neurons located in the walls of organs of GI TRACT”
Enterec plexuses
Receive information in the forms of stimuli
Sensor receptor
PNS DIVISIONS
Somatic NS AND Autonomic NS
Consist of skin, joints, skeletal, muscles; voluntary movement
Somatic
Consist of visceral organs and glands; involuntary movement
Autonomic Nervous System
“brain of the gut”; regulates the contractions and secretion GI tract
Enterec Nervous System
Functions of Nervous System
Sensory Function
Integrative Function
Motor Function
“Detect internal and external stimuli” which is carried into the brain and spinal cord through cranial and spinal nerves
Sensory Function
“Processes sensory information by analyzing” it and making decisions for appropriate responses- an activity known as integration
Integrative Function
The nervous system may elicit and appropriate motor response by “activating effectors through cranial and spinal nerves”
Motor Function
Posses electrical excitability, the a”bility to respond to a stimulus and convert it into an action potential”
Neuron
Parts Of Neuron
Dendrites
Nucleus
Axon
Cell Body
Myelin sheath
Schwann cell
Node of Ranvier
Axon erminal
Dendrites
Afferent Signals
Axons
Efferent Signals
Cone shape elevation of the soma
Axon hillock
Plasma membrane
Axolemma
Cytoplasm
Axoplasm
Types of ions channel
Leak channel
Ligand gated channel
Mechanically gated channel
Voltage gated channel
Components of Autonomic Reflexes
Receptors
Sensory neuron
Integrating Center
Motor Neuron
Effector
