Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
what are the differences between and ANS and the somatic motor system?
|
ANS:
-multiple, widespread, slow actions -wide, coordinated and graded control -commands all tissue and organs except skeletal -outside CNS -disynaptic pathwau Somatic MS -actions rapid and accurate -only peripheral targets -commands only skeletal muscle -within CNS -monosynaptic pathway |
|
|
what is the structure of the ANS?
|
CNS to preganglionic fibre synapse at autonomic ganglion down postganglionic fibre to smooth muscle/gland cell/cardiac muscle
|
|
|
what are the two division of the ANS?
|
sympathetic and parasympathetic
|
|
|
what does sympathetic division control?
|
-increased HR and BP
-depressed digestive function -mobilized glucose reserves |
|
|
what does parasympathetic divison control?
|
-slower HR, lower BP
-increased digestive function -stop sweating |
|
|
difference between sympathetic and parasympathetic structure?
|
sympathetic has ganglion much closer to CNS than parasympathetic. (ie sympathetic has shorter pre-ganglionic fibre and longer post-ganglionic fibre, para is opposite)
|
|
|
what's the effector function of somatic motor vs ANS?
|
somatic motor controls skeletal muscle, ANS controls smooth muscle cardiac muscle and gland cells
|
|
|
what are the differences between and ANS and the somatic motor system?
|
ANS:
-multiple, widespread, slow actions -wide, coordinated and graded control -commands all tissue and organs except skeletal -outside CNS -disynaptic pathwau Somatic MS -actions rapid and accurate -only peripheral targets -commands only skeletal muscle -within CNS -monosynaptic pathway |
|
|
what is the structure of the ANS?
|
CNS to preganglionic fibre synapse at autonomic ganglion down postganglionic fibre to smooth muscle/gland cell/cardiac muscle
|
|
|
what are the two division of the ANS?
|
sympathetic and parasympathetic
|
|
|
what does sympathetic division control?
|
-increased HR and BP (bv and heart)
-depressed digestive function (gut) -mobilized glucose reserves (liver) -orgasm (gonads) -inhibits micturation (gonads) |
|
|
what does parasympathetic divison control?
|
-slower HR, lower BP
-increased digestive function -stop sweating |
|
|
sympathetic chain features:
|
-entire length of vertebral column
-paravertebral: ganglia associated with vertebral levels -ganglion impar terminal -superior, middle and inferior cervical ganglia -prevertebral ganglia - found on aorta or organ of innervation |
|
|
how does sympathetic supply local (T1-L2/3) structures?
|
-leave IML
-travel in ventral roots -join spinal nerve -synapse on sympathetic post ganglionic cell -leave and enter spinal nerve -enter dorsal and ventral primary rami -supply local structures (blood vessels to muscles) |
|
|
how does sympathetic supply distant (above T1- below L2/3) structures?
|
-leave IML and travel in ventral roots
-join spinal nerve -enter and traverse sympathetic ganglion -leave and enter synaptic chain (trunk) -ascend or descend then synapse on ganglion cell -enter dorsal and ventral primary rami -supply distant structures (head, lower extremities) |
|
|
how does sympathetic supply medial visceral structures?
|
-leave IML
-travel in ventral roots -join spinal nerve -enter sympathetic ganglion -can synapse on sympathetic post-ganglionic cell (heart) or not (guts and gonads) -leave and enter either cardiac or splanchnic nerves -synapse on prevertebral ganglia -supply organ |
