Autonomic Nervous System Flashcards
Autonomic nervous system regulates vital functions of all organs by both reflex and central nervous system control but not by…
Conscious control
The ANS consists of a System and an opposing System.
Sympathetic and parasympathetic
Each of these two systems has its own
Secretory neurotransmitter
Terminal ends of sympathetic nerves secrete . Which activates.
Norepinephrine, adrenergic receptors
The terminal parasympathetic nerve ends secrete . Which acts on.
Acetylcholine, cholinergic receptors
Sympathetic system activates
Beta1 receptors
Response if Beta 1 adrenergic receptor stimulation
Increased rate at SA node, increase rate of conduction, increased force of contractility, increase irritability
Parasympathetic system activation inhibits cardiac effects. Response is
Decreased SA node pacing, decreased rate, decreased force, decreased irritability
Sympathetic activation of alpha 1 receptors causes
Construction of arteries
Parasympathetic stimulation of cholinergic receptors causes
Arterial dilation
Severe pain or seeing ones own blood may induce
Reflex parasympathetic response that causes syncope
Standing causes
Sympathetic response that constricts peripheral arteries to prevent distal pooling of blood and stimulates pacing
An abrupt fall in blood pressure caused by failure of the compensatory mechanisms of standing
Orthostatic hypotension
Elderly patients that have increased pacing but no vasoconstriction this is called
Neuroscience-cardiogenic syncope