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Pharm + Phys > Anatomy of ANS > Flashcards

Anatomy of ANS Flashcards

1
Q

What is ANS?

A

Connection between CNS + peripheral organs

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2
Q

ANS is…… neurone system and …… nervous system

A

ANS is 2 neurone system as it involves 2 neurones which are joined by ganglia
2 nervous system=> Parasympathetic and sympathetic nervous system

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3
Q

What is Somatic/ motor system?

A

Skeletal muscle
Heavily myelinated
Sodium channels in node of Ranvier which allows depolarisation t occur in saltatory conduction
Chemical released at end of motor nerve is Ach which interacts with nAchR
Single nerve process

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4
Q

How many nerves does parasympathetic system have?

A

2 nerves called pre-ganglion (lightly myelinated) + post ganglion

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5
Q

What is length of pre-ganglion in PNS?

A

Long

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6
Q

What chemical is released in both pre ganglion and post ganglion in PNS?

A

Ach

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7
Q

Where is parasympathetic ganglion found?

A

In target organs

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8
Q

How many nerves are involved in sympathetic system?

A

2 nerves called pre ganglion and post ganglion

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9
Q

What is length of pre ganglion in sympathetic system?

A

Short

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10
Q

What is chemical released in pre ganglion in sympathetic system?

A

Ach

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11
Q

What is the chemical released in post ganglion of sympathetic system?

A

Noradrenaline

Exceptions are sweat glands + adrenal glands

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12
Q

In every ganglion, Ach interacts with

A

nAchR

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13
Q

What is outflow in parasympathetic nerve?

A

Saccro-cranial outflow

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14
Q

What is outflow of sympathetic nerves?

A

Thoraco-lumbar outflow

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15
Q

Describe the antagonistic effects of heart rate?

A

PNS=>slower heart rate

SNS=> faster heart rate

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16
Q

What is the single input tissues of PNS +SNS?

A

blood vessels, sweat glands=> sympathetic

Bronchial smooth muscle, ciliary muscle of eye =>parasympathetic

17
Q

What process is SNS and PNS involved in?

A

SNS=> fight or flight

PNS=> rest and digest

18
Q

What are some non-adrenergic non-cholinergic (NANC) transmitter?

A

ATP/ neuropeptide Y (NPY)=> post ganglionic sympathetic neurone= vasoconstriction
Vasoactive intestinal peptide (VIP)=> salivary glands or bronchial smooth muscle= dilation
Nitric oxide= parasympathetic pelvis nerves= erection

Pharm + Phys (14 decks)

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