ANS Flashcards
What are the 2 divisions of the PNS?
Sensory afferent
Motor efferent
What are the 2 divisions of the sensory afferent?
Somatic, visceral
What are the 2 divisions of the motor efferent PNS?
Somatic Nervous System
Autonomic Nervous System
The ANS is a branch of which nervous system?
Visceral motor efferent of the PNS
Somatic sensory afferent receives signals from what?
Skin
Bones
Skeletal muscle
Visceral sensory afferent receives signals from?
Organs
Glands
Vessels
Somatic nervous system sends efferent signals to what?
Skeletal muscle
What are the 2 branches of the ANS?
Sympathetic
Parasympathetic
What do the visceral efferent neurons of ANS innervate?
Smooth muscle
Cardiac muscle
Glands
Where is smooth muscle innervated by ANS located?
Walls of organs
Walls of vessels
Hair follicles
Eye
What is the entire structure of a nerve? Smallest to largest
Axon –> endoneurium –> fascicle –> perineurium –> nerve –> epineurium
What is an axon?
Part of a neuron
What is the endoneurium?
Surrounds individual axons
What is a fascicle?
Groups of axons
What is a perineurium?
Surrounds fascicle
What is a nerve?
Cluster of fascicles and blood vessels
What is an epineurium?
Surrounds entire nerve
What are the 4 types of neurons?
Somatic efferent
Somatic afferent
Visceral efferent
Visceral afferent
What is unique about visceral efferent neurons?
They are actually a 2-neuron chain
What type of neuron is a visceral efferent neuron?
Multipolar