The Cell Membrane Flashcards Preview

Biology 2015-2016 > The Cell Membrane > Flashcards

Flashcards in The Cell Membrane Deck (12):
1

Cell membrane function

Regulates what enters and what leaves the cell - provides protection and support

2

The carbohydrates serve as what

Identification markers to help individual cells identify one another

3

What is the layer structure

A phospholipid bilayer- with proteins embedded

4

Why is the layer a phospholipid bilayer

To give the membrane a flexible structure & to form a strong barrier between inside and outside of the cell

5

Homeostasis

A balance of matter & energy in and waste out

6

Another name for the cell membrane

Selectively permeable membrane, semipermeable membrane

7

What can the membrane control

Speed of molecules entering & what enters and how readily

8

The Concentration Gradient

In the absence of other forces, molecules will move from one area of high concentration to an area of lower concentration

9

Two types of passive transport

Diffusion and Osmosis

10

Passive transport

No energy is being used to move molecules across the membrane

11

Diffusion

The spreading out of molecules from a region of high concentration to a region of low concentration

12

Osmosis

The movement of water molecules across a membrane from a region of high concentration to a region of low concentration