Topic 1 Cells

TOPIC 1.1 Introduction to Cells

Living Organisms: made up of cells + MRS. GREN

M Movement All living things move, even plants
R Respiration Getting energy from food
S Sensitivity Detecting changes in the surroundings
G Growth All living things grow
R Reproduction Making more living things of the same type
E Excretion Getting rid of waste
N Nutrition Taking in and using food

Here is a document covering some of the history of cell study

DPBio_1Cells_CellTheoHistory

 

keynote presentation on the CELL THEORY. The Cell Theory

Measurements in Biology

In Biology we will use the following units of measurement:

metre (m)

centimetre (cm)

milimetre (mm)

micrometer (ยตm)

nanomatre (nm)

1m=100 cm=1000mm=1000000um=1000000000nm
Relative size animation

 

Magnification

We can easily calculate the real size of a specimen by using the formula

magnification = size of the image/actual size of the specimen

Revision for bacterial cells

 

STEM CELLS

Stem cells are a unique type of cells found in living organisms. The are very special as they can become any type of cell – brain, muscle, skin, etc. When scientists discovered stem cells they were very excited because they thought they could cure many diseases or help people needing transplants. As they learned more about these cells they found out that they are quite complex and very difficult to control, that is to ‘tell’ them what to become.

Scientists have now identified three basic types of stem cells: embryonic stem cells, stem cells from Umbilical Chord Blood, and adult (sometimes called somatic) stem cells. Below are some resources for the Stem Cell Paragraph writing activity. Please watch this video, a short and clear explanation of what stem cells are. You can also find the video at:ย  studentshare–>Diploma Public—>IB Biology—>Teaching Resources—>Stem Cells

STEM CELLS

UNLOCKING THE STEM CELL POTENTIAL

STEM CELL DEBATE

TOPIC 1.2 Ultrastructure of Cells

Cell Organelles Keynote

 

 

 

 

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