lecture 1 Flashcards

1
Q

MABP = what

A

CO times TPR

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2
Q

CO equals what

A

heart rate times stroke volume

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3
Q

what is shock

A

when blood pressure is not maintained at a sufficient level

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4
Q

define perfusion

A

the passage of fluid through blood or lymph vessels to an organ

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5
Q

where are our baroreceptors

A

these are in our aortic arch and the carotid arteries

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6
Q

what type of receptor is a baroreceptor

A

it is a stretch activated mechanoreceptor which is tonically active

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7
Q

what is the immeadiate response to change in blood pressure

A

the baroreceptor reflex, so our baroreceptors detect the less stretch thus activating the ANS to cause a change in TPR

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8
Q

what is the intermediate length response to chnage in blood pressure

A

we see fluids move from the tissues into the capillaries in the process called autotransfusion

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9
Q

outline autotransfusion

A

arterioles constrict, the capillary hydrostatic hydrostatic pressure decreases, the fluid absorption from the interstitial compartment increases, the plasma volume increase, thus arterial pressure moves toward normal

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10
Q

how does the long term response work

A

this is volume replacement, ADH is released to increase water retention. also reduced renal perfusion so RAA is activated to further retain water and Na/H2O

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11
Q

what is cardiogenic shock

A

a decrease in heart output due to a heart pathology, so heart thus cannot pump sufficiently

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12
Q

what is anaphylatic shock

A

when a severe allergic reaction leads to large scale histamine release, causing increased vascular permeability and vasodilation

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13
Q

neurogenic shock what is

A

loss of SNS tone following a spinal cord injury - typically, leadibg to dysregulation of the ANS

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14
Q

what is septic shock

A

widespread vasodilation and vascular permeability due to an infection which will cause severe inflammatory response

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