Posts Tagged ‘cancer’

Mitosis

Friday, September 17th, 2010

lily mitosis by kat m research on flickr

Here are  some of the questions we’ll be answering in this section:

What is the cell cycle?

What happens in each of the four stages of mitosis?

Why can’t eukaryotes just divide by binary fission like prokaryotes do? Watch this great video.

What does mitosis have to do with cancer?

Again, we’ll use this presentation (thanks to Mr Taylor in Indonesia).  We will also do an online simulation of a lab that allows us to identify the various stages of mitosis in onion root tip cells.

Vitamin D, iodine and fibre

Monday, January 11th, 2010
Tikar lady with Goitre by superdove on flickr

Tikar lady with Goitre by superdove on flickr

Three of the nutrients that we need to consume in order to maintain a healthy balanced diet are vitamins, minerals and fibre.  We’ll look at one example of a vitamin (D), one example of a mineral (iodine) and then fibre, and aim to answer the following questions:

  • What are the sources of vitamin D in human diets?
  • What are the risks of vitamin D deficiency from insufficient exposure to sunlight vs the risk of contracting malignant melanoma (skin cancer)?
  • What are the benefits of taking dietary supplements to prevent malnutrition? Use iodine as an example.
  • What is the importance of fibre as a component of a balanced diet?

To get you started, here is a short video clip dealing with vitamin D.  I’ll let you research the others yourselves 🙂

Enjoy and learn!