Autonomic Nervous System Flashcards Preview

Jason's Neuro Block > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (35):
1

What does ANS not innervate?

CNS and Skeletal muscle

2

purpose of ANS?

homeostasis and survival

3

Organs are innervated by SNS or PNS?

Both but usually different tissues

4

Where are the sympathetic ganglion in relation to organs?

more distant

5

Where are the parasympathetic ganglion in relation to organs?

proximal or within organs

6

two post-ganglionic types in sympathetic system?

prevertebral
paravertebral (sympathetic chain)

7

where is the myelination in the pre/post ganglions?

pre: lightly myelinated
post: unmyelinated

8

Post ganglionic NTs and receptors for SNS and PNS?

SNS: NA or ACh(M);sweat glands
PNS: ACh(M)

9

primary transmitters in CNS?

Glutamate and GABA

10

Non classical NTs include?

ATP
NO
neuropeptide P and Y

11

when more than one NT released it's called:

co-transmission

12

Neurotransmission in organs 4 main points:

1. no easily visible junction
2. multiple NT release sites
3. extrajunctional receptors
4. unknown functions still

13

The intermediolateral cell column runs where? for which system?

T1 - L3
SNS preganglionic

14

what do sympathetic ganglia do?

integration
coordination between sympathetic nerves and organs

15

Paravertebral post- ganglia does what?

primary vasoconstrictor

16

prevertebreal post- ganglia does what?

primary non-vascular smooth muscle innervation

17

which system does convergence vs. divergence?

sympathetic post ganglionic
preganglionic: divergence
prevertebral: convergence

18

SNS also activates what?

Adrenal glands to get mass adrenoceptor activation via hormones

19

day-to day sympathetic activation does what?

regulates and tweaks a variety of things like HR, BP, reproduction, tissues/organs

20

3 cranial preganglionic neurons include:

1. edinger-westphal
2. salivatory nuclei
3. dorsal motor vagus/n.Ambuguous

21

preganglionic sacral do what?

control pelvic organs via pelvic plexus

22

what's special about pelvic plexus?

unusually long axons
vulnerable to surgical injury
mixed ganglia

23

pelvic ganglia are?

relay stations, no dendrites

24

Parasympathetic NS works purely via?

synapses

25

Parasympathetic not linked to rest-digest include what function?

bladder control

26

SNS and Parasympathetic antagonistic to each other?

Not really. Mostly synergistic

27

3 cases where SNS and Parasympathetic are antagonistic at cellular level?

SA node for HR
Heart contractility
Airway relaxation

28

2 examples of SNS Parasympathetic antagonism but with different cells?

SNS: dilator pupillae
Parasympathetic: sphincter pupillae
SNS: bladder
Parasympathetic: voiding bladder

29

lacrimal controlled by?

Parasympathetic

30

serous vs. mucous salivary controlled via SNS or Para?

serous: sympathetic
mucous: Parasympathetic

31

what's the only correct definition of location of preganglionic neurons?

anatomical:
sympathetic: thoracic, lumbar
Parasympathetic: cranial/sacral nuclei

32

Describe 2 types of autonomic reflex

Supraspinal: up to brain
spinal: stays in cord only

33

where is the major integrative centre for autonomic function? where does it go from there?

caudal nucleus solitarus tract in medulla: then goes:
1. local reflexes
2. higher centres

34

what is the central coordinator of autonomic output?

hypothalamus and paraventricular nucleus

35

what does hypothalamus and paraventricular nucleus with sensory ANS info?

receives
compares to set points
adjusts via endocrine
integrates with limbic and cortical systems