CHEM AND BIO HELP AND TIPS HERE

[Vin]

Is the corpus luteum in the ovary?

So oestrogen, progesterone, LH and FSH are all secreated from ovary?

yes corpus is in the ovary ..

oestrogen and progesterone are secreted in the ovary(follicle)

LH and FSH are all secreted in the pituitary gland

[Ivo]

This question is hard:

OK, thanks, how about that question?  that looks hard to me!

[soulreapr_ninja]

This question is hard:

Fertility Drugs:: FSH and LH are used in fertility drugs. FSH causes a follicle in one of the ovaries to mature into an ovum. LH causes multiple release of ova.
In males, it increases sperm production
so overall it increases chance of fertilization
Chemical methods of birth control::
Contraceptive pill-> Contains oestrogen and projesterone which prevent ovulation or simply projesterone which prevents implantation of blastula
Condom->Rubber sheath placed on the penis to stop sperm from entering the vagina

[Vin]

This question is hard:

umm .. i think i've solved this one for our mock ..

LSH and LH may be used as these drugs ..
they stimulate the production of ovaries to release the eggs and and progesterone and testosterone in males to release sperms  ..

oestrogen and progesterone can be used as chemical methods of birth control in the form of pills. They are mixed in specific proportions do that they prevent the release of the egg and the sperm reaching the egg .. also prevent the production of FSH and LH

which year is this ??

[Ivo]

umm .. i think i've solved this one for our mock ..

LSH and LH may be used as these drugs ..
they stimulate the production of ovaries to release the eggs and and progesterone and testosterone in males to release sperms  ..

oestrogen and progesterone can be used as chemical methods of birth control in the form of pills. They are mixed in specific proportions do that they prevent the release of the egg and the sperm reaching the egg .. also prevent the production of FSH and LH

which year is this ??

It's Winter 07

[Vin]

Condom->Rubber sheath placed on the penis to stop sperm from entering the vagina

use of condom is physical method brw ..

[Vin]

It's Winter 07

lemme check the ms ..

[Ivo]

By the way, this may sound a dumb question, but is respiration a metabolic reaction.  Do all metabolic reactions require oxygen and energy?

[soulreapr_ninja]

umm .. i think i've solved this one for our mock ..

LSH and LH may be used as these drugs ..
they stimulate the production of ovaries to release the eggs and and progesterone and testosterone in males to release sperms  ..

oestrogen and progesterone can be used as chemical methods of birth control in the form of pills. They are mixed in specific proportions do that they prevent the release of the egg and the sperm reaching the egg .. also prevent the production of FSH and LH

which year is this ??

october 2007

[Ivo]

lemme check the ms ..

I've looked at the mark scheme and I don't understand it, it talks about hCG - I have no idea what they are!  Argh!

[Vin]

I've looked at the mark scheme and I don't understand it, it talks about hCG - I have no idea what they are!  Argh!

hCG is Human chorionic gonadotropin (not sure abt the spelling).. i jus know tht it is secreted by the embryo after conception ..


yup googled it .. it means the abv ..

[Vin]

It's Winter 07

yea saw the ms .. u dont need to worry because u need only 3 points each to score a full ..

[Ivo]

Also, how to answer w08 last qu. part c) ii), I don't know how to explain it (qu is about ana v ae-robic respiraction)

[SoONa]

Also, how to answer w08 last qu. part c) ii), I don't know how to explain it (qu is about ana v ae-robic respiraction)

sprint running is basically short distance running so alot of energy is needed for a short time unlike a marathon runner who needs same amount of energy but over a longer time. so a marothon runner needs a good supply of oxygen for his long run while the sprint can use anaerobic respiration because  his intake of oxygen will not be needed or normal in this time and he needs lots of energy  and also  the lactic acid produced will be removed after the race so he will not get pain afterwards.

hope u understoood ..

[the_grim_reaper]

Guys do we have to learn the menstrual cycle??? Hell I hate it.. Its not like it happens with me every month which would've made it easier to remember the steps in it.....