Neuro: ANS Flashcards
What is the control center of the ANS?
Hypothalamus
where does preganglionic neurons of SNS originate? where does it synapse to?
thoracolumbar spinal cord; synapses with sympathetic ganglia
mechanoreceptors where are pressure receptors founded? Stretch receptors?
pressure: aortic baroreceptors, carotid sinuses, lungs
stretch: veins, bladder, intestines
where are O2 found?
carotid and aortic bodies
where are H and CO2 found?
medulla
where are blood glucose and electrolytes found
hypothalamus
where are chemoreceptors also present?
stomach, taste buds, olfactory bulbs
responsive to things that damage tissue in arterial walls and viscera (stretch, ishcemia, chemicals)
nociceptors
what receptors respond to minute changes in circulating blood temperature in hypothalamus?
thermoreceptors
what receptors respond to external temperature changes in skin
thermoreceptors
where does preganglionic neurons of parasympathetics originate and synapse to?
brainstem and sacral spinal cord; synapses with parasympathetic ganglia (ganglia outside of CNS)
Sympathetic NT
epinephrine and norepinephrine
PNS NT
Ach
The ANS projects to the sympathetic NS in ________ parasympathetic ganglia in the ________
T1-L2/L3
Brainstem and S2-S4
The Afferent components of the ANS carry sensory information from _______ to the CNS
Organs/tissues
How does the ANS infleunce cardiopulm function
Regulates rate and depth of respiration
Regulates the diameter of bronchial lumen
Blood glucose and electrolytes are monitored where?
IN hypothalamus
Stretch receptors are found in the ___________
pressure receptors are found in the ________
Veins, bladder, intenstines
Aorta, carotid sinus, lungs
What are 4 kinds of receptors that the ANS uses?
Mechanoreceptors
chemoreceptors
nociceptors
thermoreceptors
information from visceral receptors enter CNS via two routes: into the
- SC via dorsal roots
- brainstem via cranial nerves (7.9.10)
most visceral info coming into the BS via the cranial nerves converges in the _____ nucleus (the main visceral sensory nucleus). from there it relays to visceral control areas in the ____ and _____. and modulatory areas in the hypothalamus, thalamus, and limbic system
solitary; pons and medulla
afferent autonomic info is processed in the?
solitary nucleus, SC, areas of BS, hypothalamus, and thalamus
How does the ANS regulate homeostasis
-Cardiopulm
-metabolism
-regulate body temp
-regulate autonomic responses
Visceral Nociceptive afferents connect with somatic efferents to cause __________
Muscle guarding in skeletal muscles