Nervous System (plexus, autonomic, somatic) Flashcards
1
Q
Cervical Plexus
A
8 pairs of nerve
the phrenic nerve is most important as it controls the diaphragm (C3, C4, C5)
2
Q
Brachial Plexus
A
12 pairs
3
Q
somatic nervous system
A
- consists of neurons that control voluntary muscle movement such as skeletal muscle
- neurotransmitter is acetylcholine
4
Q
autonomic nervous system
A
- consists of neurons that control involuntary actions such as smooth muscle
- 2 parts: sympathetic and parasympathetic
5
Q
sympathetic nervous system functions
A
- majority in throacic
- functions: inhibits the secretion of digestive fluids, increases heart rate, dilates pupils, constricts blood vessels, regulates the function of glands, particularly the sweat glands
- neuroepinephrin
- fight or flight response
6
Q
parasympathetic nervous system functions
A
- majority in cervical and sacral
- functions: stimulate digestive secretion, slow heart rate, constrict pupils, dilate blood vessels
- acetylcholine
7
Q
pairs of nerves in PNS
A
43 pairs
8
Q
intercostal thoracic nerves
A
aids in muscle contraction
9
Q
intercostal thoracic nerves
A
aids in muscle contraction
