17 results found

Search Results for: selectively-permeable membrane

Plasma membrane

Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More

Facilitated diffusion

Facilitated diffusion is the transport of substances across a biological membrane from an area of higher concentration to an... Read More

Selectively-permeable membrane

Definition noun A membrane that is selectively permeable, i.e. being permeable to only certain molecules and not to all... Read More

Endomembrane system

Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More

Cell membrane

Definition noun plural: cell membranes ˈmembɹeɪn The cell’s outer membrane made up of a two layers of phospholipids... Read More

Sarcolemma

Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More

Osmosis

Osmosis is the net movement of solvent molecules through a semipermeable membrane. It is similar to diffusion as the... Read More

Amphipathic

Amphipathic is a word used to describe a chemical compound containing both polar (water-soluble) and nonpolar (not... Read More

Semipermeable membrane

Definition noun A membrane that is selectively permeable, i.e. being permeable to only certain molecules and not to all... Read More

Partially-permeable membrane

Definition noun A membrane that is selectively permeable, i.e. being permeable to only certain molecules and not to all... Read More

Biological Cell Introduction

It only takes one biological cell to create an organism. In fact, there are countless species of single-celled organisms,... Read More

Cell Biology

It only takes one biological cell to create an organism. In fact, there are countless species of single celled organisms,... Read More

Fluid mosaic model

Definition A model conceived by S.J. Singer and Garth Nicolson in 1972 to describe the structural features of biological... Read More

Selective permeability

Definition noun A feature and a function of the plasma membrane that is essential to maintain homeostasis by regulating the... Read More

Permeability

Permeability Definition What is permeability? In earth science, its definition is this: "the ability of any material such... Read More

Chemiosmotic coupling

Definition noun The process that couples or links the electron transport chain to ATP synthesis. Supplement Chemiosmosis is... Read More

Phospholipid bilayer

Definition noun The two layers of phospholipids arranged in such a way that their hydrophobic tails are projecting inwards... Read More