biology y9 part 2 cuz im tired plz help#

Question 1

What is magnification?

Answer 1

It is How much bigger a sample is under thy microscope.

Question 2

What is resolution?

Answer 2

Its the ability to distinguish to points on a image.

Question 3

What is the oberseving onion practical?

Answer 3

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.

Question 4

What is differatation?

Answer 4

When cells diffreation to carry out a particular function.

Question 5

What do carbohydrates do to save my sanity?

Answer 5

Provide energy

Question 6

What do proteins do?

Answer 6

Growth and repair.

Question 7

What is lipids?

Answer 7

A store for energy.

Question 8

What are vitamins?

Answer 8

MAINTAIN HEALTH

Question 9

What is fiber?

Answer 9

To keep food moving within the digestion system.

Question 10

What is a catalyst?

Answer 10

Increases speed of reaction.

Question 11

Whats a enzyme?

Answer 11

Biological catalyst made from protein.

Question 12

What happens at the active site?

Answer 12

1. the enzyme and the sustrate bond like a lock and a key.
2. a enzyme and a subtrate complex is created.
3. Products are created.

Question 13

What are the factors effecting enzymes?

Answer 13

Temeperature and PH.

Question 14

What happens if a enzyme denatures?

Answer 14

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

Question 15

What does the artery do?

Answer 15

CARRIES BLOOD AWAY FROM THE HEART IT HAS THICKESS WALLS BUT SMALL LUMEN WITH HIGH PREASSURE

Question 16

What is a vein?

Answer 16

It carries blood towards the heart. Has thin walls BIG lumen and LOW preasure.

Question 17

What is a Capiliary?

Answer 17

Carries blood closer to thy cells. Thin walls, very small. Diffussion happens here.

Question 18

What is conoreraty heart disease and heart attacks?

Answer 18

WHEN THE BLOOD VESSLS ARE VERY REDUCED SO THERE IS LESS BLOOD SO LESS OXYGEN.

Question 19

How is heart disease caused?

Answer 19

Diabetes, smoking.

Question 20

What are statins

Answer 20

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.

Question 21

What are artifical pacemakers?

Answer 21

Send electrical signals to the heart so that the heart beats regulary. However, they can be infected.

Question 22

What are heart transplants?

Answer 22

Heart transplants are when donor hearts replace a failed heart. they improve quality of life however there is a lack of them.

Question 23

What are artifical hearts?

Answer 23

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.

Question 24

What is cancer?

Answer 24

A change of cell DNA that can lead to uncontrolable growth.

Question 25

What are benige and maliganat tumors?

Answer 25

Bengine tumors are contained in one place. However, maliganat can spread around the whole body.

Question 26

What are the causes of cancer?

Answer 26

Viral infections and ionsing radiation.

Question 27

What are 3 Medical risk factors?

Answer 27

High blood preasure.

Smoking.

Obesity.