The type of molecules that pass most readily through a cell membrane are nonpolar molecules, such as water, oxygen, carbon dioxide and fatty substrates. The process by which these molecules are transported across cell membranes is known as simple diffusion.
it moves through aquaporins, a type of water conducting protein in the membrane. A cell whose cytoplasm has a concentration of 0.02 molar glucose is placed in a test tube of water containing 0.02 molar glucose.
Water is a small molecule that easily diffuses through a cell membrane despite the lipid tails. Water diffusion is called osmosis. Oxygen is a small molecule and it’s nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell.
Best Answer: Peter S is right. Small and hydrophobic because hydrophobic molecules dissolve easier and the smaller the surface area of the molecules the easier the diffusion of those molecules across the cell membrane.
What kinds of molecules pass through a cell membrane most easily? A) large and hydrophobic B) small and hydrophobic C) large polar D) ionic E) monosaccharides such as glucose
Membrane permeability refers to the ability of molecules, substances, etc. to pass through the membrane. For example, the cell membrane is referred to as 'semi-permeable' because it allows some ...
All of the lipid molecules in cell membranes are amphipathic (or amphiphilic)—that is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“water-fearing”) or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.
Start studying Mastering Biology Chapter 7. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... The types of transport proteins in the membrane. What kinds of molecules pass through a cell membrane most easily? Small and hydrophobic.
The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.
Small and simple molecules like water, #H_2O#, can pass through the cell membrane easily as it is partially permeable. The cell membrane can filter out unimportant molecules that the cell does not need to use, and also only lets small molecules pass through.