4.2 Autonomic Nervous System Flashcards
Which two Systems are modulated by the hypothalamus?
- Nervous system
2. Endocrine system
Which organs have only sympathetics (no parasympathetics)?
- Peripheral blood vessels (constrict)
- Hair (piloerection)
- Sweat glands
Afferent neurons travel with (2)
- ANS
2. Somatic efferents
What is micturation and which control center controls it?
Urinalysis bladder distention controlled by the brainstem
Sweat glands are the only sympathetically effector organ with a _______ post ganglionic neurotransmitter.
Acetylcholine
Other sympathetics have a NE post ganglionic neurotransmitter.
What is a varicosity?
Sites of synaptic contact between an autonomic post ganglionic neuron and its target cells. (Neurotransmitter vesicles and mitochondrion inside)
Relaxed bladder is sympathetic or parasympathetics?
Sympathetics.
What portion of the brainstem is responsible for intrinsic circulatory for some reflexes?
NST
Nucleus tractus solitarius. Receives sensory from CN 9&10
What is the function or the ediger-Westphal nucleus?
Superior&lingerie salivatory nuclei?
Dorsal motor nucleus of the vagus?
Nucleus ambiguus?
ediger-Westphal nucleus? Control of pupil&iris
Superior&lingerie salivatory nuclei?salivation reflexes
Dorsal motor nucleus of the vagus? Control of lungs and GI
Nucleus ambiguus?coordinate swallowing reflexes, control heart rate
What organs are the windows in the blood- brain barrier through which the brain can sample ECF composition and secrete hormones?
Circumventricular organs (CVOs)
How are the two routes by which the hypothalamus effects change?
- Via neural signals
2. Via secretory CVOs (secrete hormones)
What are the 2 plexus eat or the enteric nervous system?
Myenteric
Submucosal
