Ch 9 Flashcards
How does autonomic NS maint homeostasis
Regulating activity of internal organs and vasculature
(circulation, respiration, digestive, metabolism, secretions, body temp and repro)
Visceral receptors enter CNS via 2 routes
Into spinal cord (via dorsal root)
Into brainstem (via cranial n)
T/F: pons regulates HR, respiration, vasoconstriction and vasodilation via signals to autonomic efferent neurons in spinal cord and signals conveyed in vagus n
F: medulla
(pons: respiration)
The ___ = master controller of homeostasis
Hypothalamus
T/F; hypothalamus influences cardiorespiratory, metabolic, water reabsorption and digestive activity by acting on pituitary gland, control centers of brain and spinal cord
T
Limbic system produces ___ responses
Autonomic: HR due to anxiety, blushing w/ embarrassment, crying
Areas in ___ & ___ control vital func, while ___ ___ ___ modulate brainstem control
Medulla and pons
Hypothalamus, thalamus and limbic sys (emo/arousal)
All CNS output is delivered by _____
Somatic/autonomic efferent neurons
Somatic efferents innervate ___, while autonomic efferents supply ___
Only skill musc (voluntary)
All oth part of body
3 ways autonomic sys differs from somatic NS
- autonomic func = nonconscious, exerted by hormones
- int organs fun independently of CNS input
- somatic efferent pathways= 1 neuron in PNS, autonomic efferent pathways= 2 neurons that synapse outside CNS
Primary role of ___ = maint optimal blood supply, body temp, metabolism
Symp NS
T/F: craniosacral outflow = another name for sympathy NS
F: parasympathetic NS
T/F: role of parasympathetic NS = conserve energy and storage
T
T/F: fight/flight = parasympathetic NS
F: symp NS
T/F: rest and digest = parasympathetic NS
T
T/F: symp NS =
F
