Cell Membrane Functions List & Flashcards

Cell Membrane Functions List & Flashcards
1/26 (missed) 0 0
Create Your Account To Continue Studying

As a member, you'll also get unlimited access to over 79,000 lessons in math, English, science, history, and more. Plus, get practice tests, quizzes, and personalized coaching to help you succeed.

Try it risk-free
Try it risk-free for 30 days. Cancel anytime
Already registered? Log in here for access
Integral proteins
The type of protein that is located inside the lipid bilayer of the cell membrane
Got it
Composition of cholesterol
The most important component of the cell membrane, cholesterol is made up of four rings of carbon and hydrogen atoms.
Got it
Extracellular
Term referring to outside the cell
Got it
Intracellular
Term referring to inside the cell
Got it
Lipid bilayer
The double layer of phospholipids that arrange to create the cell membrane
Got it
Fatty acid chains
Strings of hydrogen and carbon atoms that make up the tails of a phospholipid
Got it
Hydrophobic
The tail part of the phospholipid that contains fatty acid chains that do not like water
Got it
Hydrophilic
The phosphate containing the head part of the phospholipid that likes, or is attracted to, water
Got it
Phospholipid
The molecule that makes up the basic structure of the cell membrane; it consists of a hydrophilic head and hydrophobic tail, arranged in a double layer.
Got it
Fluid mosaic model
Describes the structure of the cell membrane, which isn't solid, but rather a flexible structure similar to the consistency of vegetable oil
Got it
Four molecules that compose the cell membrane
Phospholipids, cholesterol, proteins, and carbohydrates
Got it
Cell membrane
The structure that all cells have that acts as a barrier, separating and protecting a cell from its' surrounding environment
Got it
Cell
The basic unit of life; living organisms are made up of one or many
Got it
26 cards in set

Flashcard Content Overview

The cell membrane is a structure found in all cells. It is composed of four different types of molecules: phospholipids, cholesterol, proteins, and carbohydrates. The cell membrane is a two-layered barrier that separates and protects a cell from its surroundings. It can also be referred to as the plasma membrane and is considered semipermeable, meaning that it determines what goes in and out of the cell, ensuring that cells will be able to get rid of waste and absorb important nutrients and gases.

When you've finished using this flashcard set, you should be familiar with all of the major parts of the cell membrane and how they work together to protect a cell. You'll also know how to spot some of these key features on a diagram.

Front
Back
Cell
The basic unit of life; living organisms are made up of one or many
Cell membrane
The structure that all cells have that acts as a barrier, separating and protecting a cell from its' surrounding environment
Four molecules that compose the cell membrane
Phospholipids, cholesterol, proteins, and carbohydrates
Fluid mosaic model
Describes the structure of the cell membrane, which isn't solid, but rather a flexible structure similar to the consistency of vegetable oil
Phospholipid
The molecule that makes up the basic structure of the cell membrane; it consists of a hydrophilic head and hydrophobic tail, arranged in a double layer.
Hydrophilic
The phosphate containing the head part of the phospholipid that likes, or is attracted to, water
Hydrophobic
The tail part of the phospholipid that contains fatty acid chains that do not like water
Fatty acid chains
Strings of hydrogen and carbon atoms that make up the tails of a phospholipid
Lipid bilayer
The double layer of phospholipids that arrange to create the cell membrane
Intracellular
Term referring to inside the cell
Extracellular
Term referring to outside the cell
Composition of cholesterol
The most important component of the cell membrane, cholesterol is made up of four rings of carbon and hydrogen atoms.
Integral proteins
The type of protein that is located inside the lipid bilayer of the cell membrane
Peripheral proteins
The type of protein that is located outside the lipid bilayer, on either side of the cell membrane, inside or outside the cell
Function of membrane proteins
These can be enzymes that speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane
Carbohydrates
The molecule, commonly known as sugar, found on the extracellular side of the cell membrane, attached to proteins or lipids. These molecules form the glycocalyx.
Function of glycocalyx
This provides cushioning and protection for the cell membrane and is important in cell recognition. It can also act as glue to attach cells together.
Functions of the cell membrane
This structure provides a physical barrier and regulates the exchange of materials with its' surroundings.
Selective permeability
The cell membrane regulates what comes in and what goes out of the cell. Only small molecules like water, oxygen, and carbon dioxide can easily pass through the lipid bilayer.
Function of cholesterol molecules
Cholesterol molecules are hydrophobic and found among the tails of phospholipids. They maintain the consistency of the cell membrane by strengthening and ensuring that it stays fluid and flexible.
Function of transport (channel) proteins
Move substances too large to cross the lipid bilayer across the cell membrane. Their structures determine what they can transport, such as glucose or sodium.
What is another name for the cell membrane?
Plasma membrane
Identify the part of the cell indicated by the red arrow.
Cell membrane
Identify the part of the cell membrane that is circled in white.
Phospholipid
Identify the molecules circled in white in the following diagram of the cell membrane.
Integral proteins
Identify the area represented by the question mark in the following diagram.
Phospholipid bilayer

To unlock this flashcard set you must be a Study.com Member.
Create your account

Unlock Your Education

See for yourself why 30 million people use Study.com

Become a Study.com member and start learning now.
Become a Member

Already a member? Log In

Support