Save
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

GCSE Organisation

GCSE Cell Organisation (Topic 2 AQA Combined Science) Flashcards

QuestionAnswer
Cell Organisation Cell - building block that all living organisms have Tissue - group of similar cells working together Organ - group of different tissues working together Organ system - group of organs working together
Enzymes Catalyse chemical reactions Each enzyme only catalyses one specific reaction because of the unique shape of its active
Amalyse Breaks down starch into maltose and other sugars and is produced in salivary glands, small intestine, pancreas
Protease Breaks down protein into amino acids and is produced in the stomach, small intestine, pancreas
Lipase Breaks down lipid into glycerol and fatty acids and is prouduced in small intestine, pancreas
Bile speeds up digestion in which 2 ways? Makes conditions alkaline so enzymes in the small intestine work better AND emulsifies fat so theres a larger SA for lipase to work on
Bile is made and stored where? Made in the liver Stored in the gall bladder
Pacemaker cells cells in the right atrium wall control the resting heart rate
Arteries Carry blood away from the heart Thick muscle and elastic layers BECAUSE blood pressure is high
Capillaries Carry blood close to the body cells to exchange substances Thin permeable walls to allow substances to diffuse in and out easily
Valves Carry blood back to the heart Thinner walls than arteries because blood pressure is lower
Rate of blod flow equation Rate of blod flow = volume of blood/time taken
Red blood cells Carry oxygen around the body No nucleus so more room for O2 Contains haemoglobin, which binds to O2 Biconcave = large SA = lots of O2 absorbed
White blood cells Defend against infection Nucleus Phagocytosis Antitoxins Antibodies
Platelets Help blood to clot at a wound
Plasma Carries everything in the blood Liquid
Cardiovascular diseases diseases of the heart or blood vessels
Coronary heart disease A build up of fatty deposit THEREFORE blood flow is restricted SO there's a lack of oxygen to the heart muscle
Statins Advantages Reduce amount of LDL cholesterol in the blood which slows down the formation of fatty deposits
Statins Disadvantages Need to be taken long term Can have negative side effects
Stent Advantages Keeps coronary arteries open for a long time Recovery time is pretty quick (surgery)
Stent disadvantages Surgery can cause bleeding or infection
Heart transplant Advantages Can treat heart failure Donor hearts work better than artificial ones
Heart transplant Disadvantages May be rejected by the immune systen
Artifical heart Advantages Can be used while waiting for heart transplant or while the heart is healing
Artifical heart Disadvantages May lead to thrombosis
Replacement heart valves Advantages Can treat severe valve damage
Replacement heart valves Disadvantages Faulty heart valves stop blood circulating effectively
Communicable disease a disease that can spread from person to person or between animals and people
Non-Communicable disease a disease that cannot spread between people or between animals and people
Malignant tumours cells that grow uncontrollably and spread to different parts of the body
Benign tumours slow- growing cells that dont invade other parts of the body
Created by: Jascelectronic
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