Biology - March 2007

Could someone describe an enzymatic/metabolic pathway that occurs in the human body in its entirety and include an example that contains a negative feedback reaction.

2007-03-10 03:04:06 · 2 answers · asked by dennis372006 2

Firstly, can scientists track when people are "thinking", and does the first thought happen in utero or outside? When?

2007-03-10 02:53:02 · 4 answers · asked by MomMom 4

2007-03-10 02:50:47 · 6 answers · asked by Anonymous

For example, I have things atm like 'Blood flows through arteries with a great force of flow, so arterial walls are thick and flexible. These thicker walls help protect against damage to the artery walls from the high pressure.'
Do you think i need to talk about anatomy of the arteries etc (e.g. tunica extema- made up of connective tissue; tunica media-smooth muscle cells and elastic-like tissues and tunica intima- made up of endothelial cells).
I always dislike having to write notes about thinkgs and having to relate it to its function, never know how much detail is needed and always seen to go off the mark!
Any (real) help would be much appreciated.

2007-03-10 02:47:49 · 4 answers · asked by Cookie_Monster_UK 5

2007-03-10 02:36:59 · 4 answers · asked by rock n' roll 1

Is there one site to review everything? I am a visual learner and need help.

2007-03-10 02:23:09 · 1 answers · asked by Anonymous

once adenosene triphospahate (ATP) is used as energy and becomes adenosene diphosphate (ADP)... how is another phospahte molecule later resynthesised to ADP to become ATP... and how does creatrine phosphate fit into this, thanks

2007-03-10 01:31:19 · 5 answers · asked by rick JAMES 4

2007-03-10 01:13:19 · 2 answers · asked by moni 2

2007-03-10 01:06:09 · 10 answers · asked by Ryan Z 1

2007-03-10 00:41:41 · 3 answers · asked by Anonymous

I read it somewhere and just wanted to mkae sure there's nothing wrong with it:
In the first 3 days, the body is still using energy from glucose (losing fat) After that, the liver starts processing body fat. After 3 weeks the body enters in "starvation mode". At this point the body "mines" the muscles and vital organs for energy. The estimated limit of resistance is 60 days.

2007-03-10 00:21:47 · 3 answers · asked by Anonymous

My skin is dry from not drinking enough water on a very regular basis. If I am drinking 8-10 glasses of water a day how many days should it take for my skin to be well hydrated?

2007-03-09 23:29:02 · 3 answers · asked by melissa13182 3

2007-03-09 23:17:19 · 9 answers · asked by shockoshocko 3

Watch this video. It proves it's not true:

http://www.youtube.com/watch?v=TZxoU6Y0LRs&mode=related&search=

Did you know that skeletons of giants have been found, but scientists suppress the information? It's true. Giants were mentioned in the Bible.

Don't believe the evil lies of evolution.

2007-03-09 22:58:50 · 17 answers · asked by Anonymous

in the calvin what happens to nadph and the rest . what are light reactions of calvin cycle

2007-03-09 21:39:17 · 3 answers · asked by maxmac97 1

2007-03-09 21:31:29 · 9 answers · asked by Anonymous

2007-03-09 21:26:33 · 7 answers · asked by Anonymous

i mean it is so nasty thing as to eat such things

2007-03-09 21:06:52 · 6 answers · asked by sasso 1

i mean it is so nasty thing as to eat such things

2007-03-09 21:06:27 · 4 answers · asked by sasso 1

2007-03-09 20:59:19 · 4 answers · asked by francheska a 1

2007-03-09 20:49:14 · 3 answers · asked by musa_95 1

There is much debate and closed preconception about the validity of the construction of the flagellum bacteria motor as pro or con intelligent design. What do you think about what the construction of the motor proves?

2007-03-09 20:13:46 · 6 answers · asked by Kostan 2

Can anyone explain where new pathogens come from, and why old pathogens are re-emerging?

2007-03-09 19:48:41 · 6 answers · asked by Anonymous

2007-03-09 19:00:55 · 7 answers · asked by lisa 1

2007-03-09 19:00:45 · 2 answers · asked by Zman 1

These we know for sure...

1. we know the first 'life' emerged in the oceans
2. we know all life originated from common single-celled life forms
2. at some point of time, these sea-dwellers crossed the shore and slowly adapted to life on land.

question is.... when did plant and animal life became separate?

Did they separate before OR after the land-crossing ?

were there plants already on land when these life-forms came to land? definetly the complex animal life-forms that crossed shore did not evolve in to plants LATER. im guessing they were already on land...

so then, when did plants cross? did plants even start in the oceans as animals did?

or, dont we actually include plant life when we say "all life came from a common single cell forms" ?

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i had asked the question an year ago, here at Y! A, but the answers were quite lame... Now, with all the experienced members around i hope to get a decent scientific answer

2007-03-09 17:37:35 · 6 answers · asked by rEdshiFt 2

2007-03-09 17:09:05 · 9 answers · asked by donia1goering 1

once adenosene triphospahate (ATP) is used as energy and becomes adenosene diphosphate (ADP)... how is another phospahte molecule later resynthesised to ADP to become ATP... and how does creatrine phosphate fit into this, thanks

2007-03-09 16:29:18 · 2 answers · asked by rick JAMES 4

2007-03-09 16:00:39 · 15 answers · asked by shepp959 3

It's for a science project of mine.
Thanks.

2007-03-09 15:34:50 · 9 answers · asked by Toilet 2