Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

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.
Your email address is only used to allow you to reset your password. See 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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

A&P Ch 20 HW

Resistance in the blood vessels is primarily controlled by altering vessel radius.
When carbon dioxide accumulates in a tissue, local arterioles will _________, increasing perfusion and decreasing carbon dioxide levels. dilate
Capillaries have only a tunica intima.
Under the microscope, the wall of a blood vessel is observed to contain only a tunica intima. This must be a(n) capillary.
The vessels that are responsible for carrying blood away from the heart are arteries.
In both pulmonary and systemic circulation, gas exchange occurs at the capillaries.
During exercise, blood is shifted from the __________ into systemic circulation. Veins
T/F : During exercise, resistance to flow in the viscera and organs decreases, causing an increase in blood flow to these areas. False
T/F :During exercise, resistance to flow in skeletal muscles increases. False
T/F : The changes in resistance to flow in the viscera and organs help cause an increase in blood flow to the skeletal muscles. True
T/F : Total cardiac output increases, but stroke volume always remains the same False
T/F : Capillary exchange is the process by which cells receive everything they need to survive and to eliminate metabolic waste. True
T/F : By far the most important means by which capillary exchange occurs is filtration False
T/F : A small amount of fluid moves out of capillaries at their venous ends, and most of that fluid reenters the capillaries at their arterial ends. False
T/F : Filtration pressure is the force responsible for moving fluid across capillary walls True
Vasomotion of the renal arteries will control blood flow to the kidneys
Blood pressure is highest in the ___________ and lowest in the _____________. arteries closest to the heart; veins
Under the microscope, a blood vessel is observed to have a relatively thin wall, a large lumen, is collapsed, and contains a thick tunica externa. This is probably a(n) vein.
Which vessel drains capillaries? Postcapillary venules
When a person changes position from lying down to standing, the blood pressure in the veins of the lower limbs __________. increases
In a working tissue like skeletal muscle, carbon dioxide may accumulate along with an increase in lactic acid. In this example, carbon dioxide and lactic acid will act as vasodilators.
Vasodilation increases blood flow and decreases blood pressure.
Vasoconstriction decreases blood flow and increases blood pressure.
T/F : Blood pressure is directly proportional to vessel resistance. True
T/F : Blood flow is affected by both blood pressure and vessel resistance. True
Deoxygenated blood from the heart myocardium drains into the right atrium via the Coronary Sinus
Created by: elizabethcosio
Popular Anatomy sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards