topic 2 (organisation) Flashcards Preview

GCSE AQA biology > topic 2 (organisation) > Flashcards

Flashcards in topic 2 (organisation) Deck (25)
Loading flashcards...
1

tissue

a group of cells with a similar structure ad function

2

organ

a group of tissues working together for a specific function

3

organ system

organs grouped together in an organ system which work together

4

three main nutrients

carbohydrates
protein
lipids (fats)

5

digestive enzymes

amylase -- breaks down starch and produces simple sugars
protease -- breaks down proteins into amino acids
lipases -- digests lipid molecules and it produces glycerol and fatty acids

6

enzymes

Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions

7

lock and key theory (enzymes)

the lock is the enzymes active site and the key is the substrate

8

arteries

Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body

9

veins

Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

10

valves

keep the blood flowing

11

capillaries

Capillaries are very tiny blood vessels,They help to connect your arteries and veins in addition to facilitating the exchange of certain elements between your blood and tissues.

12

red blood cells

helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled

13

white blood cells

White blood cells are part of the body's immune system. They help the body fight infection and other diseases.

14

platelets

Platelets are tiny blood cells that help your body form clots to stop bleeding

15

plasma

The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it.

16

cardiovascular disease

cardiovascular diseases are diseases of the heart and vessels
e.g coronary heart disease
-layers of fatty material build up in the coronary
arteries
-this causes them to narrow
-and reduces flow of blood
-this results in lack of oxygen for the heart

treatments= medication (statins), or a stent to keep arteries open

17

cancer

rapid and uncontrolled growth/division of cells in an organ leading to tumours

18

benign tumour

Benign refers to a condition, tumor, or growth that is not cancerous. This means that it does not spread to other parts of the body.

19

malignant tumour

Malignant refers to cancer cells that can invade and kill nearby tissue and spread to other parts of your body.

20

type of diseases

communicable disease = disease that can be spread from one person to another

non-communicable diseases are diseases that cannot be spread from one person to another

21

life style diseases

diet (lots of sugar) = diabetes ,heart disease...
smoking = lung cancer
alcohol = sickness ,memory loss....

22

the lungs

Your lungs bring fresh oxygen into your body. They remove the carbon dioxide and other waste gases that your body's doesn't need. To breathe in (inhale), you use the muscles of your rib cage – especially the major muscle, the diaphragm. Your diaphragm tightens and flattens, allowing you to suck air into your lungs

23

the digestive system

read notes in folder!!!

24

the heart

-oxygenated blood goes into the heart through the right atrium
-then goes through the right ventricle to the lungs where it is oxygenated
-now the oxygenated blood goes through the left atrium
-from there it goes out through the left vertical and to the rest of the body

25

plant organisation

Plant cells, tissues and organs are adapted to their functions. The stem, root and leaves form an organ system that transports substances into, around and out of a plant. The leaves are the main organ of photosynthesis.