ANS (8) EXAM 2 Material Flashcards
Somatic NS Area of concern
External Environment
Autonomic NS area of concern
Internal Environment
Somatic NS Effector Organs
Musculoskeletal system
Autonomic NS Effector Organs
Smooth muscle, glands, cardiac muscle..
Somatic NS Location of motor neurons
CNS
Autonomic NS location of motor neurons
Outside CNS (ganglion)
Somatic NS # of synapses
Monosynaptic (1)
Autonomic NS # of synapses
Disynaptic (2)
Somatic NS Control
Mostly controlled voluntarily/consciously
Autonomic NS Control
Involuntary - not under conscious control
Somatic NS: CNS Controls?
Requires input from the CNS
ex: to flex arm
Autonomic NS: CNS controls?
Many internal organs can function independantly of CNS input
ex: heart beating
What types of receptors are in the Afferent system of ANS? (4)
- Mechanoreceptors
- Chemoreceptors
- Nocioceptors
- Thermoreceptors
Rest and Digest: Parasympathetic or sympathetic?
Parasympathetic
Energy conservation and storage: parasympathetic or sympathetic?
Parasympathetic
Fight or flight: Parasympathetic or sympathetic?
Sympathetic
Activated during exercise, excitement, emergencies: Parasympathetic or sympathetic?
Sympathetic
Autonomic Dysreflexia is a spinal cord injury where?
Above T6
What happens to the sympathetic neurons below the level of the lesion in autonomic dysreflexia?
They are activated due to some noxious stimuli
Is the spinal cord able to receive signals from the brain that INHIBITS sympathetic activity in autonomic dysreflexia?
NO
What are the consequences from the SC being unable to receive signals from the brain to inhibit sympathetic activity?
- Excessive sympathetic response
2. Spike in blood pressure (can be life threatening)
Why cant someone with Autonomic Dysreflexia urinate?
Because the motor signals cant reach the organs due to the lesion
