An interface is constantly exposed to the environment e.g skin, gas exchange system or digestive system
6 of 27
If you give up smoking, what happens to your risk of developing lung cancer?
It won't mean you'll never get lung cancer but it does REDUCE your risk so it's never too late to change
7 of 27
What's an antigen?
A molecule (usually protein) that activates an immune response when identified as foreign and the production of antibodies occurs.
8 of 27
The immune response can be split into 2....
Cellular and Humoral
9 of 27
What is antigenic variation?
When the antigens on a pathogens surface change shape so they are no longer specific and complementary to the bodies antibodies and memory cells. This means the body has to go through the primary response as it's a new strain.
10 of 27
What is digestion?
Digestion is the breaking down of large molecules into smaller molecules.
11 of 27
What is hydrolysis?
The chemical breakdown of a compound due to reaction with water.
12 of 27
The monomer of proteins are what?
Amino acids
13 of 27
What are Proteins 4 structural levels?
Primary, Secondary, Tertiary and Quaternary.
14 of 27
Polypeptides are formed by.....
Condensation reactions
15 of 27
Carbohydrates are made from......
Monosaccharides
16 of 27
Lactose is digested by an enzyme named?
Lactase
17 of 27
Starch is made up of 2 polysaccharides?
Amylose and Amylopectin
18 of 27
Enzymes are biological catalysts so they....
speed up chemical reactions
19 of 27
3 things can effect enzymes in a reaction....
Temperature, pH and Substrate concentration
20 of 27
TEM
beam of electrons, give high resolution but can ONLY be used on thin specimens
21 of 27
SEM
knock off electrons, can produce 3D images, give lower resolutionsTri
22 of 27
Triglycerides are made up of?
A Glycerol, 3 fatty acid tails that makes lipids insoluble in water
23 of 27
Rate of diffusion is effected by what?
concentration gradient, thickness of exchange surface, surface area.
24 of 27
Osmosis is
the net movement of water molecules from a high water potential to a low water potential through a partially permeable membrane.
25 of 27
Facilitated diffusion uses
Carrier proteins and Protein channels
26 of 27
What does active transport do?
Uses energy to move molecules and ions across plasma membranes, against a concentration gradient
Comments
No comments have yet been made