Review1 Flashcards
Another name for peripheral nervous system
Autonomic nervous system(ANS)
Which types of fibres is not belong to to PNS
Somatic fibres=motor fibres
Five aspect controlled by PNS
- Heart beat
- Relaxation and contraction of smooth muscle
- All exocrine function
- Some endocrine function
- Some steps in intermediate metabolism
Structure of ANS
2 neurons outside CNS: preganglionic & postganglionic
Preganglionic fibres made up of which types of fibres
Myelinated B fibres
Postganglionic fibres made up of which type of fibres
Non myelinated C fibres
How postganglionic neurons are organized
Carried in either nerve bundles or plexi
Three divisions of ANS
- Parasympathetic nervous system
- Sympathetic nervous system
- Enteric nervous system
Where is the output of PNS(para) come from?
- Mid-brain&medulla: cranial nerve III, VII, IX, X
2. Sacral part of the spinal cord, eg. Pelvic nerve
Where is the parasympathetic ganglia
Near to or in the innervated tissue
Function of PNS(para)
- Stimulates flow of saliva
- Slows heartbeat
- Constricts bronchi
- Stimulates peristalsis & secretion
- Stimulates release of bile
- Contracts badder
Stimulate flow of saliva: PNS or SNS
PNS
Slows heartbeat: PNS or SNS
PNS
Constrict bronchi: PNS or SNS
PNS
Stimulate peristalsis and secretion: PNS or SNS
PNS
Stimulate release of bile: PNS or SNS
PNS
Contracts badder: PNS or SNS
PNS
Where the output of SNS come from?
Thoracic-lumbar
T1-12, L1–3
Leaves with spinal nerves and synapse in ganglia either side of the vertebra column.
Sympathetic chain
The synapse in ganglia either side of the vertebral column
Where is SNS ganglia?
The ganglia are distal to the innervated tissue
Dilates pupil: PNS or SNS
SNS
Inhibits flow of saliva: PNS or SNS
SNS
Accelerates heartbeat: PNS or SNS
SNS
