8. Maintenance of arterial blood pressure Flashcards by idhil Unknown | Brainscape

Q

Blood Pressure

A

Cardiac Output x Peripheral Resistance

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Q

Normal MAP for healthy young adult

A

Systolic/Diastolic 120/80 mmHg

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Q

MBP calculation

A

[(2 x diastolic) + systolic] divided by 3

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Q

Poiseuille’s Law

A

If you halve the radius, resistance increases 16 fold!

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Q

Decrease HR

A

autonomic = vagus

transmitter = ACh

receptor = Cholinergic muscarinic (M2)

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Q

Increase HR/SV

A

autonomic= Sympathetic

transmitter= Noradrenaline

receptor = Adrenergic β1

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Q

Constrict Arteriole smooth muscle

A

autonomic = sympathetic

transmitter = noradrenaline

receptor = Adrenergic α1

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Q

Dilate Bronchiole smooth muscle

A

autonomic = Sympathetic

transmitter= Adrenaline

receptor= Adrenergic β2

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Q

Baroreceptor Location:

A

Carotid sinus
Aortic arch

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Q

Baroreflex response to a fall in MAP

A

SVR ↑

Venoconstriction

LV preload ↑

Inotropy ↑

HR ↑

MAP is restored

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Q

How is the baroreflex assessed experimentally?

A

Neck suction

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