The cell splits into two, bacteria divide quickly if in the right conditions and cells stop dividing and start to die if the conditions are bad
Binary Fission
1 of 26
Found in early human embryos, can turn into any type of cell and are also found in adult bone marrow
Stem Cells
2 of 26
The Stem cells could cure many ...
diseases
3 of 26
There are some … issues with them
Ethical
4 of 26
They are used in medicine and ...
research
5 of 26
A … is a genetically identical cell
clone
6 of 26
The spreading out of particles from an area of high concentration to an area of low concentration
Diffusion
7 of 26
A bigger … gradient, the faster the rate of diffusion
concentration
8 of 26
A higher temperature, gives a faster ...
diffusion rate
9 of 26
The movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration
Osmosis
10 of 26
Water particles move … so they pass through the membrane both ways
randomly
11 of 26
Osmosis is a type of … only with water particles
diffusion
12 of 26
A partially permeable membrane has small holes in it so only … can pass through
small molecules
13 of 26
Absorbing a substance against a concentration gradient from a lower concentration to a higher concentration
Active Transport
14 of 26
These absorb minerals and water
Root Hairs
15 of 26
Active transport requires ...
energy
16 of 26
Active transport can happen in … when there is a lower concentration of minerals in the gut but a higher concentration of minerals in the blood
humans
17 of 26
How organisms exchange substances with its environment depends on the organisms … ratio
surface area to volume
18 of 26
… organisms have a large surface area compared to volume, so enough substances are exchanged
single celled
19 of 26
… organisms have a small surface area compared to volume, not enough substances can diffuse
Multicellular
20 of 26
Changes to their environment are known as. Include thin membrane, large surface area, lots of blood vessels and often ventilated
Adaptations
21 of 26
These are in the lungs: -Have an enormous surface area, moist lining for dissolving gases, very thin walls and a good blood supply
Alveoli
22 of 26
These are in the small intestine: Surface area so big that food is absorbed into blood a lot quicker, single layer of surface cells and very good blood supply for absorption
Villi
23 of 26
Diffusion happens at the stomata, controlled by ...
Guard cells
24 of 26
These are on gills and increase surface area
Lamellae
25 of 26
Underside of … is an exchange surface, which is covered in stomata
Leaf
26 of 26
Other cards in this set
Card 2
Front
Found in early human embryos, can turn into any type of cell and are also found in adult bone marrow
Comments
No comments have yet been made