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

plants chap 13/9

QuestionAnswer
what would hap is blood and qater in parralel flow in fish? diffusion grad only maintained across part of gill lamellea only 50% of oxygen in water absorbed in blood.
How to maintain a steep con grad? bringing O2 constantly to surface by ventilation & and carrying it away from surface by mass transport of blood.
what does the diffusion grad favour? oxygen from water into blood.all oxygen from water diffuses into blood.
what reduces the need for gas exchange with external air in plants? when the gases in photosynthesis can be used for another. This means VOLUME and TYPES of gases being exchanged by leaf CHANGE. depends on rate of photo and respiration. hing.
when is diffusion fastest in air or water? in gas phase
How is leaf adapted? short diffusion pathway, have large surfaceA. no specialisrd surface needed coz gases move in and out easily.
what is stomata? MINUTE pores underneath leaves. Each STOMA surrrounded by GUARD CELLS. GUARD CELLS - open and CLOSE stomatal Pore. to control rate OF GASEOUS DIFFUSION. stomata open reveals stomatal aperture aperture
why are guard cells import? plants are terestial - lose water via evoporation from surface. plants have to balance GASEOUS EXCHANGE. with WATER LOSS. they open guard cells PARTIALLY/ COMPLETELY.
Why do large orgqnisms need specialisedexchange surfaces? exchange or R gases ,nutrients and excretory proeucts. diffusion transport through short distances.
Cells to exchange surfaces ... exchange surfaces to cells, cells to enviroment. these surfaces in specific regions.
the lower the surface area to volume ratio.. and more active animal is thegreater the need for specialised trabsport system with a pump.
features of the transport system? a medium to carry material-e.g. blood - this is normally a liquid besed on water - water readily dissolves substances & can move easily.
form of mass transport - which transport medium is moved around in bulk in large quantities. closed system.of tubular vessels that contain transport medium & form branching network to distribute to all parts of body.
How to achieve a pressure difference in one system and other. animals use muscular contraction in muscles or pumping organ(heart) . plantw use muscles and evaporation of water (passive) and VALVES.
why do mammals have a double circulatory system? coz when blood goes to lungs pressure reduced. if to pass immediately to body at low pressure = circulation slow. so blooe return to heart to increase pressure before circulated.
why is is good that subs are delivered to rest body fast for mammals? mammals have high boey temp/ metabolic rate. Tiswue heart lungs. lungs heart tissue.
what are the 3 main vessels ( circulatory system) in mammals? veins ,arteries ,capillaries.
what is tranport system final part of journey into cells? Via diffusion - final exchange from blood vessel into cells is fast coz - Ficks law ( large surface area ,short diffusion pathway,steep con grad.
plan of mamalian circulatory system? head neck - upper limbs-lungs pulmonary artery-pulmonary vein - heart( components) - liver( hepatic portal vein/artery)-stomach& inestine - kidneys -renal artery/vein- lower limbs .
what are the 3 diff types of blood vessels and functions? arteries - carry blood from heart into arterioles. arterioles - smaller arteries - control blood fpow into capillaries. capilaries - link arterioles to veins. veins - carry blood from cappilaries back to heart.
arteries arterioles ,veins layered structure? tough outer layer - resist pressure changes muscle layer - contract and control flow of blood. elastic layer-help maintain BP by stretching.
mechanism for moving tansport medium in vessels. - requires pressure difference. tbc.
Created by: ufuoma
Popular Biology 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