Question

Mecanismos de transporte celular en los que se usa el gradiente de concentración. Explique cada uno

Answer 1

Transportation is any process in which the movement of matter and / or energy occurs from one part of a system to another. If a substance can pass through a membrane, it is said that the membrane is permeable to that substance, if a substance can not pass, the membrane is impermeable The plasma (cellular) membrane is selectively permeable since it allows the passage of some particles and excludes other . Between the membranes of the cell without any help, the substances can cross if they are liposoluble and if they are of small size.4. Structure of the cell membrane Cell membrane It is a thin and flexible lipid barrier that separates the contents of cells and organelles from their environment. Lipid bilayer This consists of phospholipids that have an apolar hydrophilic end formed by the phosphate head towards the ECF and the ICF and a polar hydrophobic end formed by the lipid tail towards the core of the plasma membrane. Within this lipid bilayer are membrane carbohydrates, cholesterol molecules and, most importantly, membrane proteins.