Test 2.4 Flashcards
What determine the amount of pressure
Diameter
Where is pressure the highest and lowest
Aorta
Arteries
Capillaries
Veins
When does the heart have high pressure
In systole
When does the heart have low pressure
In diastole
Where does the biggest change in pressure occur
Between aorta and capillary beds
What’s the typically pressure in the aorta
100 mmHg
What does the capillary hydrostatic pressure usual vary at
35-18 mmHg
Venous pressure is ____ an resistance is ______
Low and low
Where does the lowest pressure occur
The right atria during diastole it’s 2 mmHg
What is blood pressure measuring
Pressure in aorta and arteries
What is mean artieral pressure used for
To report blood pressure
Which does the heart spend more time in diastole or systole
Diastole
What is hypertension
High BP over 120 mmHg
What is hypotension
Low BP under 80 mmHg
What happens if pressure is too low
Venous return drops
CO drops
Baraoreceptors communicate to ANS to increase BP
What’s the end result once Low BP is corrected
Cardioacceleratory center activited
Cardioinhibitory center not activited
Vasomotor center activited
What happens if pressure is too high
Venous return increases
CO increases
What happens once high BP is fixed
CO is decreased
Cardioacceleratory center deactivated
Cardioinbitory center activited
Casino your center deactivited
What happens if BP stays high
You can have an aneurysm or dissected aorta
What happens during an aneurysm
Bulge in artieral wall
Weakened elastic fibers
Ruptures=death
What happens during a dissected aorta
It rips from the inside
First layer tears
More pressure on outer layers
What happens to vericose veins in the legs
Valves break or separate
Blood pools in lower limbs&veins stretch
What does the skeletal muscle pump do
Helps develop pressure when standing
Must counter force if gravity
Muscles squeeze vessels to develop pressure
Valves direct flow toward heart
Where is pressure developed
The heart
