Forms of cell transport Flashcards
What is Diffusion?
The process in which molecules scatter throughout available space.
Small enough to pass through the pores.
They can dissolve in fatty portions of the membrane.
What is Simple diffusion?
Unassisted diffusion of solutes through the plasma membrane.
What is Osmosis?
The diffusion of H2O through a selectively permeable membrane.
What is Facilitated Diffusion?
This provides certain needed substances such as (Glucose) to pass through the membrane into the cell protein carrier needed to move substances across the membrane.
This is when you want to move low gradient to high so you have to use ATP.
What is Filtration?
This is a process by which H2O and solutes are forced through a membrane by fluid or Hydrostatic pressure. Pressure gradient pushes fluid from high pressure areas to low pressure.
What are the two types of Active transports of material?
These types of transports are called Solute Pumping and Sodium-Potasium pumping.
What is solute Pumping?
This requires a protein carrier to move the substance across the membrane a membrane protein carrier on the membrane and it uses ATP. Amino acids, sugars, some ions transported by solute pumping.
What is Sodium-Potasium pumping?
Simultaneously carries sodium ions (out) and potassium ions into the cell.
What are the types of Bulk transport?
They’re Exocytosis and Endocytosis.
What is Exocytosis?
It is moving the substances out of the cell. It will actively secrete hormones, mucus and other cell product. Products move into a small membrane sac called the (Golgi Apparatus).
What is Endocystosis?
It is when the cell uses ATP to take in extracellular substances into the cell by enclosing them into a small membrane vesicle. the detaches from the cell membrane moves into the cytoplasm, fuses with the Lysosome and the contents are digested.
What is Phagocytosis?
Cell eating (large substances) bacteria, dead cells scavenger cells known as Phagocytes they also police and protect the body.
What is Pinocytosis?
Cell Drinking, Used to take in liquids which contain dissolved proteins or fats.
What is included in the passive process of a cell when transporting across the membrane?
This would include Diffusion, temperature, Steepness of the concentration gradient, osmosis, simple diffusion and facilitated diffusion.
What is the Aquaporins (AQP’s)?
This helps is maintaining the water levels in a cell.
They are Integral membrane protein that function as water channels.
They have been found in different cells and tissues around the body and they are responsible for the production of tears, sweat, saliva and the concentration of urine.
