Active Transport Active transport is the movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiratio...
Passive Transport Simple diffusion Simple diffusion is a type of transportation that involves particles passing between phospholipids in the plasma membrane It can be defined as: The net movement, ...
History of Fluid Mosaic Model NOS: Using models as representations of the real world; there are alternative models of membrane structure Scientists use models to represent real world ideas, organis...
Membrane Proteins The phospholipid bilayer carries out the main function of the plasma membrane - to control the movement of substances into and out of the cell The other functions are carried out ...
Amphipathic Properties Phospholipids Phospholipids form the basic structure of the membrane (the phospholipid bilayer) They are formed by a hydrophilic phosphate head bonding with two hydrophobic h...
Drawing Cells Drawing the ultrastructure of cells To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made Biological drawin...
Electron & Light Microscopes NOS: Developments in scientific research follow improvements in apparatus; the invention of electron microscopes led to greater understanding of cell structure In s...
Comparison of Prokaryotic & Eukaryotic Cells Animal and plant cells are types of eukaryotic cells, whereas bacteria are a type of prokaryote There are a number of important structural and physi...
Exocrine Pancreatic & Palisade Mesophyll Cells Exocrine gland cells of the pancreas The pancreas contains two types of gland cells: endocrine and exocrine cells The function of the exocrine gla...
