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Flashcards in Transport Across Cell Membranes Deck (16):
0

What is the cell membrane made up of?

Protein and lipid molecules

1

Why is the cell membrane structure described as being a fluid mosaic?

The lipids and proteins are randomly arranged

2

What molecule can form a pore?

A protein molcule

3

Are cell membranes fully or selectively permeable?

They are selectively permeable

4

What does selectively permeable mean?

Large insoluble molecules can't pass through however small soluble ones can

5

Name the 3 different types of transport across the cell membrane

Diffusion
Osmosis
Active transport

6

What is diffusion?

The movement of molecules of a substance from an area of high concentration to an area of low concentration

7

What is osmosis?

The movement of water molecules from an area of high water concentration to an area of low water concentration

8

What is active transport?

The movement of molecules from a region of low concentration to a region of high concentration against the concentration gradient.

9

What processes are passive ones?

Diffusion and osmosis

10

What processes are active processes?

Active transport

11

What is cell culture?

Using the process of mitosis to grow cells in an artificial environment

12

Name 4 things cell culture requires

A growing medium
Available oxygen
Suitable temperature
Suitable pH level

13

Name 2 growing mediums

Nutrient broth
Agar jelly

14

What do aseptic techniques allow you to do?

To help maintain a sterile environment and prevent contamination

15

Name 2 in each category:
Personal hygiene
Work area
Sterilisation

Long hair tied back
Wear lab coat/gloves/glasses

Surfaces should be clean and tidy
Cell culture hood should be used

All equipment should be sterilised
All dishes should be sealed immediately after use