Biology of cells and organisms

[Edmund]

PM me your email if you want a past paper with answers (2008)

[Starlight]

So much memorisation I think I may go crazy

[jinny1]

Here are some more to help you out

Lepidophagy
Mucophagy   
Ophiophagy
Xylophagy
Geophagy
Osteophagy
Trophallaxis
Oophagy
Paedophagy
Granivore
Insectivore
Myrmecophage
Mycophage
Frugivore
Piscivore
Folivore

[Starlight]

Haha those ones are okay! Looked them over today

[nubs]

We don't need to learn all of those ones do we? Like do we need to memorise the 'unusual' ones or just the ones that got their own slides?

[Starlight]

I probably wouldn't be too concerned about the 'unusual' ones maybe just know a couple like oophagy and osteophagy because they are easy to remember and paedophagy, that's the easiest one!

[Starlight]

I'd look at the ones with their own slides- and examples of them, like mymercophage- echidna, frugivore- orangutan etc.

[jinny1]

LOL at PaedoPhagy

[seretide]

Do you guys think we need to know the structure of the kidney? And about the digestive tracts of the male toad,male mouse, male reproductive tract, female urogenitial tract, female mouse urogenitial tract and human female reproductive tract? I think I'm about to die...

[anonymous1]

^ unfortunately we do

the reproductive system stuff is easy, the structures are pretty similar except for the toad
i have not looked at kidney yet doing that today

[Starlight]

C'mon guys, we can do it!! It'll all be over soon!

[anonymous1]

i don't understand how gastrulation occurs, can someone explain?
I understand the outcomes and stuff but not the actual process of it

[Russ]

Do you need to know the actual process?

Not sure how much of this you already know, but here's my understanding:

It's when the epiblast (that specific half of the inner cell mass) gives off the three fundamental germ cell layers. The epiblast develops something called the primitive streak, which is just thicker cells than usual. These cells then invaginate and descend towards the hypoblast (the bit behind the epiblast). This folding gives rise to the primitive groove.

Cells migrate into the primitive groove and take up residence in the space between the epiblast and hypoblast; the first ones become the endoderm and the later ones become the mesoderm. What's left in the epiblast becomes the ectoderm.

That's my understanding of how it occurs, hope it helps/

[Starlight]

i don't understand how gastrulation occurs, can someone explain?
I understand the outcomes and stuff but not the actual process of it

If you had to know what it is, i'd just know something two lines worth like: single-layed blastula is reorganised into a trilaminar (3-layered) structure. For the purpose of this course i'd say just know the diagrams (labelling) and the outcomes.

[simpak]

Ignore everything Russ just told you.