Biology - March 2007

The veins draining most organs carry blood directly to the heart. However, the veins and lymph vessels that drain the small intestine empty into a vein called the hepatic portal vein that carries the blood directly to the liver. What is the physiological significance of this anatomical arrangement?
a. The arrangement enables the liver to efficiently process nutrient molecules, such as converting excess glucose into glycogen for storage.
b. Insulin can be secreted from liver cells in direct proportion to fuel molecules absorbed in the small intestine.
c. Starch and glycogen molecules absorbed from the intestine can be broken down to glucose in the liver.
d. Ghrelin secretion by liver cells can be effectively suppressed following a meal.

2007-03-04 08:24:39 · 4 answers · asked by Anonymous

2007-03-04 08:10:02 · 3 answers · asked by jaryllechu 2

What do you do 2 determine if the purple flower is PP or Pp? Do you self pollinate them?

2007-03-04 07:34:30 · 4 answers · asked by *believe_it* 4

Which classification does lung tissue belong? (Epithilial, muscle, connective, or nerve?)

2007-03-04 07:34:09 · 4 answers · asked by confusedkid 1

2007-03-04 07:28:27 · 6 answers · asked by softballmusiclover11 2

2007-03-04 07:20:34 · 5 answers · asked by Anonymous

2007-03-04 07:19:44 · 3 answers · asked by Anonymous

2007-03-04 07:19:02 · 4 answers · asked by Anonymous

2007-03-04 07:18:28 · 4 answers · asked by Anonymous

2007-03-04 07:12:43 · 2 answers · asked by Anonymous

A friend of mine has 2200 white cell count, when it should be 1100. If no proper answer is given, can I be directed to the wright place to find the answer.

2007-03-04 07:05:19 · 9 answers · asked by Anonymous

what is some basic info on algae.

2007-03-04 07:00:27 · 2 answers · asked by Anonymous

2007-03-04 06:42:30 · 4 answers · asked by Biology q 1

2007-03-04 06:33:10 · 7 answers · asked by I am soooo splendiferous 4

Looking for an answer similar to mine, because I am not sure if mine is correct or not. thanx

2007-03-04 06:32:45 · 2 answers · asked by esrarengizbeauty 1

I like this girl in my school that I find pretty hot but i dont know if she likes me back. Last year , I sat next to her in math and she would always poke me with her pencil and try to act funny. At my middle school graduation i was also next to her and 1 min. we were talking and like after 5 min. shes like, " i forgot u were here." wtf? This year we make eye contact in the hallways and sometimes talk but other than that i have no clue how she feels. What do you think??

2007-03-04 06:32:19 · 1 answers · asked by Gagan G 2

31.From what source does ATP synthase get the energy it needs to produce ATP?


32.What molecules are required for the Calvin cycle reactions to occur? What molecules are produced? Here do these reactions occur (be specific)?

2007-03-04 06:31:37 · 1 answers · asked by placeforthejunk 1

I am trying to fill out this thing and some things I just cannot find for the life of me so I'm going to attempt to get help here.
For # 57-67 below, match the letter of the correct phase from the list below to the events that take place during that phase. Each phase may be used more than once. Each question has only one best answer
a.interphase
b.prophase
c.metaphase
d.anaphase
e.telophase

57.______ Chromatin coils up into chromosomes
58.______ DNA is in the form of chromatin and the cell goes through its normal activities.
59.______The mitotic spindle forms.
60.______Division of the cytoplasm begins.
61.______Sister chromatids are separated, with half going to one end of the cell and half to the opposite end.
62.______The mitotic spindle disappears.
63.______Nuclear membranes re-form, and two daughter cells formed.
64.______DNA is replicated.
65.______Chromosomes line up in the middle of the cell, at the spindle equator.
66.______Chromosomes uncoil to form chomotatin.
67.______The nuclear membrane disappears.

2007-03-04 06:30:40 · 2 answers · asked by placeforthejunk 1

2007-03-04 06:28:43 · 2 answers · asked by Dov F 1

As in, two people can not share the same bare footprints?

2007-03-04 06:22:19 · 7 answers · asked by Chreap 5

...does that mean that all the people that believed in creation for thousands of years before darwin were wrong?

if every bridge, every building, every computer, etc, etc, has a maker, why doesn't the earth?

2007-03-04 06:14:05 · 8 answers · asked by Anonymous

this is for science homework ,so calling all people good at science

2007-03-04 05:59:57 · 8 answers · asked by princess sasha banks 1

Who's the most famous biologist to ever have existed?

2007-03-04 05:56:03 · 9 answers · asked by imaforestspirit 3

2007-03-04 05:53:58 · 5 answers · asked by Anonymous

Need to EXPEL large amounts of water to offset osmosis ,
Need to TAKE IN large amounts of water to offset osmosis ,
Slowly dehydrate over the course of their lives ,
Slowly swell up over the course of their lives?
I really need some help.
Please do not write anything not pertaining to the question?

2007-03-04 05:44:39 · 2 answers · asked by Anonymous

2007-03-04 05:42:50 · 2 answers · asked by Anonymous

2007-03-04 05:42:16 · 2 answers · asked by Anonymous

2007-03-04 05:42:10 · 1 answers · asked by Me<3JB 2

2007-03-04 05:34:22 · 2 answers · asked by Anonymous

Like alcohol or drugs, no other animal does. Why is this?

2007-03-04 05:33:56 · 6 answers · asked by r_janks 2