Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Chapter 19

Blood Vessels

QuestionAnswer
cardio meas __ while vascular means __ heart - vessels
blood goes from the aorta to the ___ to the __ to the __to the venules then the __ and __ to the right atrium arteries -> arterioles ->capillary --> veins -> vena cava
why is pressure so high in arteries? b/c it just came from pumping heart
what are the 3 type of vessels? arteries, veins & capillaries
arteries carries blood __ and regulates __ away from heart - blood pressure
there are lots of smooth muscles and fibrous tissue in this vessel so it doesn't rupture. arteries
arterioles function: promote or shut off flow in capillary beds
what are arterioles? small arteries close to capillary beds
arteries don't have __ only veins do. valves
lumen opening blood is passing through
valves prevents __ backflow
sit of gas exchange, one line of epithelial tissue. capillaries
veins carries blood __ to the heart
capillaries has ___ and a ___ endothelial cells & basement membrane
3 tissues that make up vessel wall: tunica intima, media & externa
the tunica intima is made up of: endothelium
the tunica media is composed of __ smooth muscle & elastic fibers
arteries are thicker in the tunica media because... they can control diameter
this vessel wall is made of collagen fiber. which vessel is it? tunica externa
which vessel wall gives tissue blood supply? tunica externa
the ___ wraps around vessels holding it together tunica externa
blood flow volume of blood getting through body in certain time frame
pressure of blood against wall of large arteries measured in mmHg blood pressure
systolic pressure peak pressure during systole
diastolic pressure lowest level pressure during diastole
normal blood pressure is__ 120/80 mmHg
systolic pressure is generated by ___ ventricular contraction
in diastolic pressure, the walls of the arteries... recoil to maintain pressure
what is pulse pressure? difference between systolic & diastolic pressures
amount of blood that's returning to the heart is known as... venous return
mean arterial pressure (MAP) : average pressure experienced by vessels through cardiac cycle
MAP formula: diastolic pressure + pulse pressure / 3
the bigger the pressure gradient... the faster blood travels
if cardiac output & resistance increases, so does.. pressure
mean arterial pressure is responsible for... propelling blood
what are the 3 sources of resistance? viscosity, vessel length, vessel diamater
vasoconstriction contracts vessels to make narrow - increase in resistance
vasodilation relax vessels to make wide - decrease in resistance
the higher the RBC count... the thicker the blood
the higher the viscosity, the... thicker the resistance
out of the 3 sources of resistance...which one changes? vessel diameter
what is the difference between turbulent flow and laminar flow? turbulent flow is rough, slows blood down - laminar: smooth flow
turbulent flow affects the ___ vessel wall
endothelial injury is known as atherosclerosis
vessels are not elastic, they all respond... differently
atherosclerosis can cause__ instability rupture
CO depends on___ blood flow
we can effect resistance by: changing diameter of vessel
change in pressure = cariac output x resistance
veins have a larger ___ than arteries diamater
blood pressure changes anytime we change ___ or ___ cardiac output or resistance
neural control alters ___ and ___ cardiac output - resistance
2 goals of neural control? 1. maintain adequate by altering vessel diameter 2. alter blood distribution to respond to demands
which ANS innervates vessel diameter? sympathetic system
what is vasomotor tone? normal resting rate
sympathetic efferents are ___ that ___ vasomotor fibers - innervate smooth muscle of vesels mostly arterioles
what are baroreceptors? stretch detectors - detect pressure changes
where are baroreceptors found? carotid sinuses, aortic arch, large arteries of neck &thorax
chemoreceptors detect ___ changes such as __ chemical - oxygen, CO2
when pH levels falls, ___ levels rise, which ____ O2 - activates cardioaccelatory center
chemoreceptors has a big influence on ___ ___ respiratory rate
chemoreceptors activates vasomotor center which causes reflexive ___ vasoconstriction
the cerebral cortex & hypothalamus relay messages to the ___ medullary centers
in the brain, the fight or flight system is mediated by.... the hypothalamus
Created by: Mariahj25
Popular Anatomy sets

 

 



Voices

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:
Retries:
restart all cards