5 Autonomic Nervous System Flashcards
The sympathetic nervous system’s thoracolumbar division has ___-synaptic fibers leave the spine at level of thoracic vertebrae and upper lumbar.
It synapses in the ____________ chain (short pre-synaptic). It also innervates walls of organs, glands, smooth muscle with LONG ____-synaptic with lots of branching.
Responsible for ______ of flight division mediated through epinephrine and norepinephrine’s release on target organs.
Pre
Paravertebral . Post
Fight
The ___ controls ___________ and the body at rest “Rest and digest”. Originates in _______ region of spinal cord, medulla, CN’s ,,_,10
The ___ controls body’s response to perceived threat “fight or flight”. Originates in _________ and lumbar regions of spinal cord.
.
PNS.
Homeostasis
Sacral
CN: 3,7,9,10
SNS
Thoracic
ANS innervation
Uses two divisions to maintain ___________ or get desired effect. Usually have ________ effects. In most organs, resting tone from ___ predominates.
Organs like the sweat glands, vascular smooth muscle, liver, adipose tissue, and kidney only have ___ innervation
….homeostasis
OPPOSITE
PNS resting tone
SNS
State where the ANS control centers are located in the brain.
- Helps with water balance, temperature, hunger
- Deals with respiration, cardiac, and vasoconstriction
- Involved in respiration
- Hypothalamus
- Pons
- Medulla
In the PNS, you have __________ receptors on target organs.
M2 which has a G_ coupled protein. M3 which has a G_.
In the SNS you have adrenergic receptors.
Alpha1 which has a G_ coupled protein.
B1 and B2which have a G_ protein
Lastly, alpha2 has a G_ which regulate release of epi and norepi by negative feedback
Muscarinic
GI. GQ
GQ. GS
GI
Compare and Contrast nicotinic receptors with muscarinic receptors
the main difference between them is their mechanism of action: one uses ions and the other uses G-proteins. Nicotinic receptors are all excitatory, but muscarinic receptors can be both excitatory and inhibitory depending on the subtype. They also differ on where they are found in the body (i.e. sympathetic vs parasympathetic nervous system).
Autonomic nervous system controls everything except your _______ muscle.
Skeletal
_____________ nervous system
Craniosacral division with pre-synaptic fibers leave the spine at the level of cranial nerves _, _, _, __ and the sacrum
Synapse in or near target _____. With _____ pre-synaptic
Innervate walls of organs glands and smooth muscle, but with _____ post-synaptic, less branches, discrete effects.
Referred to as the ____ and digest division mediated through Ach release on target organs
Parasympathetic
3,7,9,10
Organ. Long
Short
Rest
Sympathetic effects:
______ or _____ response
Activated as an ________ system.
Increases __, __, __ airway and pupil diameter, sweating
________ blood flow to the gut, absorption, and secretions
_______ total body energy production
Flight flight
Entire
Blood pressure, blood glucose, heart rate
Decreased
Increases
Parasympathetic effects
_____ and _____ response
Activated on specific _____
_________ HR, BP, pupil diameter etc.
_______ blood flow to the gut, absorption, and secretions
Body is usually under ___ control
Rest and digest
Organs
Decreases
Increases
PNS
_____________ sense a drop in BP.
PNS efferent response carried along _____ nerve. Which
Baroreceptors
Vagus
Pupillary light reflex is controlled by the ___. The dilator muscle is innervated by ___. Constrictor muscle is innervated by ___. Too much light strikes rentina, PNS activates, not enough ___ activates. Accommodation reflex is also ___ mediated.
Bladder filling and emptying requires both sides to communicate. Emptying of the bladder uses a _________________ control mechanism while filling of the bladder is just the opposite.
ANS SNS PNS SNS ANS
Parasympathetic=emptying
Sympathetic = filling