EVERYDAY SCIENCE

Detailed explanation-1: -The phospholipid bilayer formed by these interactions makes a good barrier between the interior and exterior of the cell, because water and other polar or charged substances cannot easily cross the hydrophobic core of the membrane.

Detailed explanation-2: -The cell membrane has selective permeability. The cell membrane is primarily composed of phospholipids arranged in a bilayer, with the hydrophobic tails on the interior of the membrane, and the hydrophilic heads pointing outwards.

Detailed explanation-3: -The phospholipid bilayer is critical in maintaining the integrity of the cardiomyocyte, as it forms a permeability barrier that provides a physical interface between the inside and the outside of the myocyte. It also contains key enzymes and ion channels that regulate ionic gradients across the cell membranes.

Detailed explanation-4: -Cell membranes act as a barrier and gatekeeper between two distinct areas. Due to their semi-permeable nature, only a small number of molecules may penetrate the lipid bilayer. Gas and small hydrophobic molecules, such as oxygen and and carbon dioxide can quickly pass through membranes.