Cell Biology 2

Question 1

What are the advantages and disadvantages of a light microscope

Answer 1

Advantages -
-not expensive
-Relatively small
-The original colour of the specimen can be viewed
-not much experience is needed to set it up

Disadvantages -
-don’t magnify as far as an electron microscope
-has lower resolution
-cannot operate in darkness

Question 2

What advantages and disadvantages of electron microscope

Answer 2

Advantages-
-has a greater magnification
-has a greater resolution
-can operate in the dark

Disadvantages-
-very expensive
-very big
-needs maintenance
-needs experience to use

Question 3

Say what you know about specialised cells

Answer 3

• Specialised cells make tissue which makes up organs and organ systems which make up our body
• nerve cells, reproductive cells and blood cells are specialised cells
• they have structures that are adapted for the function

Question 4

What is a stem cell

Answer 4

Stem cells are special cells produced by bone marrow and is a cell that is not yet specialised

Question 5

What are the three transportations in cells and what are they

Answer 5

Diffusion - diffusion is the movement of particles from an area of high concentration to an area of low concentration

osmosis - osmosis is the movement of water molecules from a solution of a high concentration of water molecules to a solution of low concentration of water molecules

active transport - Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration