integration of cardiovascular function (regulation) Flashcards Preview

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Flashcards in integration of cardiovascular function (regulation) Deck (23)
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1
Q

is the chnage in pressure different for each organ

A

No, same change in presure

2
Q

what determines what organs get the highest flow

A

The organs with the smallest resistance get the highest flow

3
Q

what determines MEan systemic arteriall pressure

A

Cardiac output

Total peripheral resistnace

4
Q

what is total peripheral resistnace

A

The sum of the resistance to flow offered by all the systemic blood vessels

5
Q

what is the equation for MAP

A

COx TPR

6
Q

how does one chnage map

A

chnage cardiac output

Change total peripheral resistance

7
Q

what does a drop in MAP lead to

A

a drop in organ to blood flow

8
Q

what does the body adjust to protect mean arterial blood pressure

A

Compensatory changes

9
Q

what does Flow equal

A

change in pressure/ resistance

10
Q

what is flow equal to in the body

A

Cardiac output

11
Q

what is resistnace equal to in the body

A

TPR

12
Q

what happens to MAP and organs if blood loss

A

Reduces MAP and leads to irreversible and fast damage to brain and heart

13
Q

what is the receptor that helps to control homeostatic maintenance of MAP

A

baroreceptor neurons

14
Q

what do baroreceptors do

A

Constantly monitor pressure of aortic arch and carotid sinuses to maintain MAP

15
Q

what is the normal resting MAP

A

93ish

16
Q

what happnes to barorecptor action as pressure changes

A

increases with increased pressure

decreases with decreased pressure

17
Q

where do barorecptors neurons deliver MAP information

A

To the cardiovascular control center in the medulla oblongata

18
Q

what does the cardiovascular control center do based on barorecptors

A

Controls autonomic output to the heart, arterioles and Veins

19
Q

what is the response goal of the barorectpros

A

Move MAP back to the set point as quickly as possible

20
Q

can the sympathetics work on the heart, and vessels alone

A

No, must act on all 3

21
Q

how can parasympa change MAP

A

only can act on the heart

22
Q

what does a long increase in MAP lead to

A

pushes fluid out of the blood to the urine, decreasing Blood volume, reducing MAP back to set point

23
Q

how long does the Kidneys take to adjust MAP

A

hours to DAys