Describe and explain the function of the cell membrane?

The cell membrane consists of a mosaic of proteins and a phospholipid bilayer, with the hydrophobic fatty acid tails orientated inwards and the hydrophilic phosphate heads outwards. The main function is to control which substances move in and out of the cell, also known as selective permeability. Small non-polar molecules such as water can easily pass between the phospholipids whereas larger charged molecules such as Na+ must pass through intrinsic proteins, specifically ionchannels. Cholersterol is also present in the membrane to provide stability.

Answered by Tutor87124 D. Biology tutor

2539 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What factors affect the rate of conduction of an action potential (AP) down a neurone?


What is the purpose of myelin on a neurone?


Explain how the body responds to a fall in water potential.


Which organelle in the cell is responsible for supporting its 3D structure?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences