Autonomic Nervous System Flashcards
What does the CNS consist of
The brain in the spine
CNS
Central nervous system
PNS
Peripheral nervous system
Somatic is voluntary and innervates what
Skeletal muscles
The autonomic nervous system is in voluntary and innervates what
Digestion and circulation
The autonomic nervous system is divided into sympathetic and parasympathetic divisions what’s the difference
Sympathetic is fight or flight
Parasympathetic is rest and digest
The unit of cellular structure of the CNS
Neuron
Electrical influx or action potential
How a neuron communicates
In what part of the neuron do the normal cell processes occurs
Cell body or soma
Where are the receptors located
In the dendrites
Axon is know as the _____ part
Sending
In the sending part, how many directions does the impulse travel
One direction
Where do axons terminate
Axon terminal / vesicles
How do neurons communicate
By way of the synaptic cleft
The target is also know as
Effector
If the synapse is outside the CNS what is it called
Ganglion
Where do neurons of the sympathetic division originate
Thoracolumbar portion of spine
The origin portion of the spinal cord is known as preganglionic or________
Presynapse
Postganglionic or post synapse neurons extend where
Organs
Preganglionic/presynaptic neurons originate in the brain and sacrum. How do they travel?
They don’t travel thru spinal nerves but thru the postganglions to the target or effector
The electrical signal from the brain that crosses the synapse is transformed into a chemical called what
Neurotransmitter
Where are neurotransmitters stored
In the vesicles of a neuron at the terminal
What do neurotransmitters bind to on the postganglions?
Receptors
Nerve action is either inhibitory or
Excitatory
What process allows the neurotransmitter to be removed then allowing a second transmission
Reuptake process
Reuptake happens at the axon terminal where _________ inactivate/remove the neurotransmitters
Enzymes
What are the primary Nero transmitter chemicals
Other neurotransmitters are epinephrine dopamine serotonin and _____
Acetylcholine and norepinephrine
GAMA
Where are receptors located
What type of muscle and glands are receptors located
In the dendrites of the postganglions
Smooth and cardiac muscle and glands
What organs are not innervated by neurons
Sweat glands
Smooth muscle of hair follicles
Adrenal medulla
Blood vessels of the skin
Adrenergic
Sympathetic
Collinergic
Parasympathetic
Rest and digest maintains homeostasis and slows______
Lowers____
Stimulates_____
Heart rate
Blood pressure
Gastrointestinal
Fight or flight
Increases——
Increases——
Dialates—–
Heart rate
Blood flow
Bronchi
Acetylcholine is released from the preganglionic terminal and excites the adrenergic/postganglions and initiates synthesis and release of—
Norepinephrine into the neuroeffector junction
Catechilamines are adrenergic neurotransmitters.
What are they derived from?
Amid acid. tyrosine
What r the principle amino acid catecholamines?
EPI
NE
Dopamine
What do cholinergic / nerve fibers synthesize
ACh
Nerve fibers that secrete NE are called what
Adrenergic
