U2 B6 1HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

B6 Cell division

• Take off your jacket
• Put your things on your desk

       Book/laptop,

       Notebook  

• Bag on the floor
• Read pgs. 122-124

Lessongoals

• You can describe how a cell divides
• You can name the features of stem cells

Homework : U2 B6

Asgmt 1-7, 5c

OR challenge

Asgmt 4-9, 5c

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

A person who researches stomach problems, mostly works on the level of:

1. Cell
2. Tissue
3. Organ
4. A, B and C combined

What is NOT something plant roots do

1. Making food
2. Storing food
3. Taking up water
4. Anchoring the plant

You have found that cells from the eye of an organism have 36 chromosomes in their nuclei.
How much chromosomes do you expect to find in a cell of this organisms feet?

1. less
2. more
3. the same amount
4. It's impossible to tell

What part of a cell stores water?

1. Cytoplasm
2. Nucleus
3. Vacuole
4. Cell membrane

Cell division

Cell division is happening constantly in your body:

• 3,5 kg of new skin cells every year
• 200.000.000.000 new blood cells every day

Cells also die a lot!

• More new cells than dying cells = growth

Cell cycle

parent cell

daughter cell

daughter cell

DNA is copied, which results in 2 nuclei both containing 46 chromosomes = division of nucleus

1

Cell division starts by creating a cell membrane in the middle of the parent cell, once this is done the new cells separate

2

2 daughter cells are formed, plasma growth adds cytoplasm making the cells the same size as the parent cell

3

After cell division

• 1 daughter cell > specialized cell > heart cell, muscle cell, blood cell, etc.
• 1 daughter cell > stem cell > parent cell
• Stem cells can divide into new cells
• Stem cells don't specialize

skin cells

nerve cell

blood cells

stem cell

A human stem cell divides.
This creates daughter cells: cell A and cell B.
How many chromosomes are in cell A? (only use numbers)

Cell A is a stem cell.
Cell A divides into cell B and C.
Cell B becomes a liver cell.
What happens to cell C?

1. Becomes a liver cell
2. Becomes a body cell
3. Becomes a stem cell
4. Impossible to tell

What you should do: U2 B6

• Pages  122-124
• Asgmt  1-7, 5c 

OR challenge

• Asgmt 4-9, 5c

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do: U2 B6

• Pages 122-124
• Asgmt 1-7, 5c

OR challenge

• Asgmt 4-9, 5c

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish