Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Blood Pressure

Maintaining blood pressure

QuestionAnswer
State the pressure gradients from the aorta to capillaries 60mmHg (90mmHg to 30mmHg)
State the pressure gradients across the capillary bed 15mmHg (30mmHg to 15mmHg)
State the pressure gradients from the capillaries to the heart 15mmHg (15mmHg to 0mmHg)
State the formula for flow Flow = difference in pressure / resistance
Factors affecting blood flow Sympathetic nerves, hormones and local factors i.e. metabolic and endothelial
Factors affecting blood pressure Blood volume, total peripheral resistance, cardiac output
Mean arterial pressure = diastolic pressure + 1/3 pulse pressure
Metabolic controls that dilate blood vessels decrease O2, increase CO2, decrease pH, increase prostaglandins, increased osmolarity, increased nitric oxide
Metabolic controls that constrict blood vessels increase endothelin
Nerves that constrict the blood vessels Sympathetic
Hormones that constrict the blood vessels alpha receptors, ADH, angiotensin II
Hormones that dilate the blood vessels beta receptors, ANP (atria natriuretic peptide)
Created by: 813890255