biology y9 part 2 cuz im tired plz help# Flashcards
What is magnification?
It is How much bigger a sample is under thy microscope.
What is resolution?
Its the ability to distinguish to points on a image.
What is the oberseving onion practical?
Take a thin piece of onion, Put it on a microscope slide, stain the cells with iodine, put glass cover on, focus the image with the focusing wheels and then draw and label the diagram cells.
What is differatation?
When cells diffreation to carry out a particular function.
What do carbohydrates do to save my sanity?
Provide energy
What do proteins do?
Growth and repair.
What is lipids?
A store for energy.
What are vitamins?
MAINTAIN HEALTH
What is fiber?
To keep food moving within the digestion system.
What is a catalyst?
Increases speed of reaction.
Whats a enzyme?
Biological catalyst made from protein.
What happens at the active site?
- the enzyme and the sustrate bond like a lock and a key.
- a enzyme and a subtrate complex is created.
- Products are created.
What are the factors effecting enzymes?
Temeperature and PH.
What happens if a enzyme denatures?
The shape of the active site changes and the enzyme can no longer work as they is to much heat or PH. ENZYMES ARE NOT KILLED YOU STUPID BASTARD LOOKING AT THIS AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
What does the artery do?
CARRIES BLOOD AWAY FROM THE HEART IT HAS THICKESS WALLS BUT SMALL LUMEN WITH HIGH PREASSURE
What is a vein?
It carries blood towards the heart. Has thin walls BIG lumen and LOW preasure.
What is a Capiliary?
Carries blood closer to thy cells. Thin walls, very small. Diffussion happens here.
What is conoreraty heart disease and heart attacks?
WHEN THE BLOOD VESSLS ARE VERY REDUCED SO THERE IS LESS BLOOD SO LESS OXYGEN.
How is heart disease caused?
Diabetes, smoking.
What are statins
They reduce blood cholestrial levels. they slow down the build of fatty materials but there are side effects and u have to take them regulary.
What are artifical pacemakers?
Send electrical signals to the heart so that the heart beats regulary. However, they can be infected.
What are heart transplants?
Heart transplants are when donor hearts replace a failed heart. they improve quality of life however there is a lack of them.
What are artifical hearts?
A device used to support your actual heart until it can be replaced. They last for 2 years however there is a risk of blood clotting.
What is cancer?
A change of cell DNA that can lead to uncontrolable growth.
