If you have any any questions or are uncertain about anything to do with the course, then this is the place to get help.
It will be up to you (as a class) then to answer the issues raised. You can keep your input anonymous or include your initials, it's up to you.


In the toolbar you will notice an 'A' with three colours under it. To change the colour of your text, you need to highlight the text first, then click on the 'A' button. Now click on rectangle next to 'colour' and type in the following:
For a question type in #750a56 to change to dark magenta
For an answer type in #17066a to change to dark purple

Or you can use what ever colour you wish by click on the outside ring of colours and then on the inside square.

In case you want to jump to the other faq page the link is below.
biol 1 faq (nsfaq) part1

Q. In the topic of plant gas exchange, would stomata or epidermis be classified as respiratory surfaces? JA

A. interesting question! the respiratory surface is where gas actually moves across, thus in plants it will actually be the plasma membranes of the cells within the leaf. The stomata are not repsiratory surfaces, they only allow air to move into the spaces within the leaf that surround the cells. VM

Q. What do sieve tube cells actually do? Is it a filtering job or something else? JA

A. They are part of the phloem tissue that is involved in transporting sugars and other dissolved solutes around the plant. They don't actually filter. The "holes" that they have simply allow these substances to move from one sieve cell to the other more easily, rather than having to cross plasma membranes all the time. So, sieve tube cells act likely a pipeline. Unlike xylem tissue, they are living cells but because they have most of their organelles removed they rely on companion cells for energy and proper functioning. VM
Thankyou very much. It all makes sence now!

Q. Hello all! i was just wondering, what is the difference between the pharynx and larynx? GR

A. Well the pharynx is the region at the back of the throat. There are different parts to it but it is the passage that eventually becomes the oesophagus. Now in front of the oesophagus is the trachea (windpipe). Between the pharynx and trachea is a region called the larynx which includes the vocal cords. So during inhalation (or when we inspire!) air passes from the pharynx into the larynx, then into the trachea and down to the bronchi and lungs. Look at a diagram in your text book or on the net to help you make sense of this.VM