OCR BIOLOGY

microscopy, cells, organelles, gaseous exchange and the heart

HideShow resource information
  • Created by: eleanor
  • Created on: 02-11-09 16:21
What is magnification?
the degree to which the size of an image is larger than the object itself
1 of 23
What is resolution?
the degree to which it is possible to distinguish between two objects
2 of 23
What is the resolution of an electron microscope?
0.1nm
3 of 23
What is the resolution of a light microscope?
200nm
4 of 23
What is the max. magnification of a TEM microscope?
x500,000
5 of 23
What is the max. magnification of a SEM microscope?
x100,000
6 of 23
What does the cytoskeleton refer to?
the network of protein fibres that give shape and structure to the cell
7 of 23
What does the Golgi Apparatus do?
recieves proteins from the ER and modifies them, to be transported via vesicles
8 of 23
A phosphate head is?
hydrophilic
9 of 23
A fatty acid tail is?
hydrophobic
10 of 23
What is a fluid mosaic?
the model of a cell membrane structure
11 of 23
When a phospholipid molecule has a carbohydrate part attached to it, it is called a...
glycolipid
12 of 23
When a protein molecule has a carbohydrate part attached to it, it is called a...
glycoprotein
13 of 23
Why do good exchange surfaces have a thin barrier?
to reduce diffusion distances
14 of 23
In humans, where in the lungs does gas exchange take place?
the alveoli
15 of 23
How thick is the alveolus wall?
1 cell thick
16 of 23
What is better, a double or single circulatory system?
double
17 of 23
What is the cardiac cycle?
the sequence that happens in a heartbeat
18 of 23
What starts the cardiac cycle?
The sinoatrial node
19 of 23
Where is lymph held?
in the lymphatic system
20 of 23
What does each subunit of a haemoglobin contain?
polypeptide chain and haem group
21 of 23
Oxyhaemoglobin is formed when...
haemoglobin takes up oxygen
22 of 23
The Bohr Effectrefers to a change in shape of the oxyhaemoglobin curve when...
carbon dioxide is present
23 of 23

Other cards in this set

Card 2

Front

What is resolution?

Back

the degree to which it is possible to distinguish between two objects

Card 3

Front

What is the resolution of an electron microscope?

Back

Preview of the front of card 3

Card 4

Front

What is the resolution of a light microscope?

Back

Preview of the front of card 4

Card 5

Front

What is the max. magnification of a TEM microscope?

Back

Preview of the front of card 5
View more cards

Comments

goodboy7

Report

a spiffing test!

Similar Biology resources:

See all Biology resources »