the autonomic nervous system Flashcards
what is the autonomic nervous system controlled by?
the hypothalamus
what are the two divisions of the autonomic nervous system?
parasympathetic
sympathetic
what does the parasympathetic system do?
rest and digest
restores normal body function
what does the sympathetic system do?
fight or flight
prepares the body for physical activity
what is the neurotransmitter in the parasympathetic system?
acetylcholine (ACh)
what is the neurotransmitter in the sympathetic system?
noradrenaline (NA)
in the parasympathetic system:
what happens to the eyes?
pupils constrict
in the parasympathetic system:
what happens to the salivary gland?
stimulation of salivary gland
in the parasympathetic system:
what happens to the heart?
heartbeat slows
in the parasympathetic system:
what happens to the lungs?
bronchi constrict
in the parasympathetic system:
what happens in the stomach?
digestion is stimulated
in the parasympathetic system:
what happens to the liver?
bile release is stimulated
in the parasympathetic system:
what happens to the intestines?
peristalsis and secretion are stimulated
in the parasympathetic system:
what happens in the bladder?
the bladder contracts
in the sympathetic system:
what happens in the eyes?
pupils dilate
in the sympathetic system:
what happens in the salivary glands?
salivation is inhibited
in the sympathetic system:
what happens in the heart?
heartbeat is accelerated
in the sympathetic system:
what happens in the lungs?
the bronchi dilates
in the sympathetic system:
what happens in the stomach?
digestion is inhibited
in the sympathetic system:
what happens in the liver?
glucose release is stimulated
in the sympathetic system:
what happens in the kidney?
epinephrine and norepinephrine release are stimulated
in the sympathetic system:
what happens in the intestines?
peristalsis and secretion are inhibited
in the sympathetic system:
what happens in the bladder?
bladder relaxes
