Unit 2 Flashcards
What are the four major functional categories
Transport, enzymatic activity, signal tranduction, attachment/recognition
Explain me the tranport function of the membrane proteins
Provide a hydrophylic channel or change the shape of specific molecule so that they can pass the membrane
Explain me the enzymatic activity function for the membrane proteins
Enzyme associated with the membrane like the photosynthetic and the respiratory electron transport chains
Explain to me the signal transduction of the function of membrane proteins
receptor proteins on the outer surface that binds to specific chemicals such as hormones.
Attachment/recognition
Attachment points for a range of cytoskeletal elements.
What are the two types of passiove transport
SImple diffusion asnd facilitated diffusion
What is the diffusion and how it works?
It goes from a high concentration environment to a low concentration environment.
What are the two factors that impact the rate of the simple diffusion and why?
Firstly, there is its molecular size, a big molecule will have a lot more difficulty passing throufgh a membrane that a very small ions.
secondly, its lipid solubility. Lipids tend to be hardly soluble in water and this fgactor makes the diffusion harder since the solubility will depends on the phospsholipids of the membrane.;
What are the two proteins of facilitated diffusion?
Channel proteins and carrier proteins. Channel more for ions and water and Carrier more for molecule and amino acids .
The diffusion of water is principally made by what diffusion pattern? And which water-specific cannel transport water?
Osmosis and aquaporins.
How does the water get drawn in the aquaporins?
The positively charged amino acids of the proteins draw the water into its canal and facilitate its diffusion across the membrane.
If the cell is big and remplish of water what is its state?
Hypotonic
If the cell is small and ratatouille?
Hypertonic
If the cell is normal?
Isotonic
Draw me an endocytosis!