Autonomic nervous system & ganglia L7

Question 1

what is the origin of sympathetic nervous system?

Answer 1

left horn cells of T1 to L3 (thoracolumber)

Question 2

what is the origin of the parasympathetic nervous system?

Answer 2

cranial part: X, IX, VII & III (1973)
sacral part: 2, 3, 4
N. their fibers unite to form pelvic nerve

Question 3

Define ANC

Answer 3

part of the nervous system r responsible to regulation of involuntary or visceral(الاحشاء) functions in the body.

Question 4

what are the characteristics of sympathetic nervous system?

Answer 4

• fight and flight
• catabolic to energy
• delay fatigue
• increase energy use
• mass stimulation is useful

Question 5

What are the characteristics of parasympathetic nervous system?

Answer 5

• rest and digest
• anabolic to energy
• saves energy
• mass stimulation is fatal
• repair and recovery of constracting muscles.

Question 6

what are the characters of bregan galionic neuronneuron

Answer 6

• origin: CNS
• end: ganglia
• type: thin myelinated (type B)
• colour: white
• No: few
• chemical transmitter: acetylcholine

Question 7

what are the characteristics of the postganglionic neuron?

Answer 7

• origin: outside cns
• end: effectors
• type: non-myelinated (type c)
• colour: gray
• no: more
• chemical transmitter: Acetylcholine & noradrenaline

Question 8

cell bodies of the postganglionic neuron forms ……

Answer 8

ganglia

Question 9

Define autonomic Ganglia?

Answer 9

collection of cell bodies outside cns

Question 10

mention the functions of ganglia:

Answer 10

• relay stations for autonomic preganglionic neuron.
• distribution center.

Question 11

in the sympathetic NC the ratio preg : postg is ….

Answer 11

1:32

Question 12

What is the nature of the actions of the sympathetic nervous system?

Answer 12

• widespread distribution
• generalized

Question 13

in the parasympathetic NS the ratio between preg : postg is …..

Answer 13

1:2

Question 14

What is the nature of the actions of the parasympathetic nervous system?

Answer 14

localized

Question 15

mention the types of ganglia and their sites:

Answer 15

• paravertebral (lateral) → sides of the spinal cord
• prevertebral (collateral) → close to the aorta and its branches
• terminal ganglia → close to the effector

*lateral ganglia is called olso sympathetic chain.
branches of the aorta are: celiac, *superior mesenteric & inferior mesenteric.

Question 16

what are the types of ganglia which act as relay station for the sympathetic preganglionic nerve fibers?

Answer 16

lateral & colateral ganglia

Question 17

type of ganglia which act as relay station for parasympathetic preganglionic fibers?

Answer 17

terminal ganglia

Question 18

type of ganglia which is characterized by short postganglionic neurons ……

Answer 18

terminal ganglia

Question 19

type of ganglia which is presnt mainly in the abdomen …….

Answer 19

colateral (prevertebra)