Autonomic Nervous System Flashcards Preview

Jason's Neuro Block > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (35)
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1
Q

What does ANS not innervate?

A

CNS and Skeletal muscle

2
Q

purpose of ANS?

A

homeostasis and survival

3
Q

Organs are innervated by SNS or PNS?

A

Both but usually different tissues

4
Q

Where are the sympathetic ganglion in relation to organs?

A

more distant

5
Q

Where are the parasympathetic ganglion in relation to organs?

A

proximal or within organs

6
Q

two post-ganglionic types in sympathetic system?

A

prevertebral

paravertebral (sympathetic chain)

7
Q

where is the myelination in the pre/post ganglions?

A

pre: lightly myelinated
post: unmyelinated

8
Q

Post ganglionic NTs and receptors for SNS and PNS?

A

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

9
Q

primary transmitters in CNS?

A

Glutamate and GABA

10
Q

Non classical NTs include?

A

ATP
NO
neuropeptide P and Y

11
Q

when more than one NT released it’s called:

A

co-transmission

12
Q

Neurotransmission in organs 4 main points:

A
  1. no easily visible junction
  2. multiple NT release sites
  3. extrajunctional receptors
  4. unknown functions still
13
Q

The intermediolateral cell column runs where? for which system?

A

T1 - L3

SNS preganglionic

14
Q

what do sympathetic ganglia do?

A

integration

coordination between sympathetic nerves and organs

15
Q

Paravertebral post- ganglia does what?

A

primary vasoconstrictor

16
Q

prevertebreal post- ganglia does what?

A

primary non-vascular smooth muscle innervation

17
Q

which system does convergence vs. divergence?

A

sympathetic post ganglionic

preganglionic: divergence
prevertebral: convergence

18
Q

SNS also activates what?

A

Adrenal glands to get mass adrenoceptor activation via hormones

19
Q

day-to day sympathetic activation does what?

A

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

20
Q

3 cranial preganglionic neurons include:

A
  1. edinger-westphal
  2. salivatory nuclei
  3. dorsal motor vagus/n.Ambuguous
21
Q

preganglionic sacral do what?

A

control pelvic organs via pelvic plexus

22
Q

what’s special about pelvic plexus?

A

unusually long axons
vulnerable to surgical injury
mixed ganglia

23
Q

pelvic ganglia are?

A

relay stations, no dendrites

24
Q

Parasympathetic NS works purely via?

A

synapses

25
Q

Parasympathetic not linked to rest-digest include what function?

A

bladder control

26
Q

SNS and Parasympathetic antagonistic to each other?

A

Not really. Mostly synergistic

27
Q

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

A

SA node for HR
Heart contractility
Airway relaxation

28
Q

2 examples of SNS Parasympathetic antagonism but with different cells?

A

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

29
Q

lacrimal controlled by?

A

Parasympathetic

30
Q

serous vs. mucous salivary controlled via SNS or Para?

A

serous: sympathetic
mucous: Parasympathetic

31
Q

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

A

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

32
Q

Describe 2 types of autonomic reflex

A

Supraspinal: up to brain
spinal: stays in cord only

33
Q

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

A

caudal nucleus solitarus tract in medulla: then goes:

  1. local reflexes
  2. higher centres
34
Q

what is the central coordinator of autonomic output?

A

hypothalamus and paraventricular nucleus

35
Q

what does hypothalamus and paraventricular nucleus with sensory ANS info?

A

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