cell transport
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cell transport
im answering questions for my IB Biology class and i need some help...
After a cookie has been digested, glucose molecules enter the bloodstream by the process of
A) phagocytosis
B) diffusion
C) ingestion
D) pinocytosis
After a cookie has been digested, glucose molecules enter the bloodstream by the process of
A) phagocytosis
B) diffusion
C) ingestion
D) pinocytosis
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MrMistery
- Inland Taipan
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actually it's neither 
A glucose molecule is taken in by an enterocyte(a cell of the small intestine) by a Na-assisted secondary active transport mechanism. two Na molecules(rarely, only one) and one glucose molecule attach to the protein and enter the cell. They travel down the concentration gradient of NA, but glucose also enters the cell, by this mechanism called a symport.
From the enterocyte the glucose molecule enters the bloodstream by facilitated diffusion, according to it's own concentration gradient. It travels through a permease of the GLUT family.
Not a good question for someone who hasn't learned the functioning of membrane transport. But you can go to your teacher with my explanation and probably get an A
A glucose molecule is taken in by an enterocyte(a cell of the small intestine) by a Na-assisted secondary active transport mechanism. two Na molecules(rarely, only one) and one glucose molecule attach to the protein and enter the cell. They travel down the concentration gradient of NA, but glucose also enters the cell, by this mechanism called a symport.
From the enterocyte the glucose molecule enters the bloodstream by facilitated diffusion, according to it's own concentration gradient. It travels through a permease of the GLUT family.
Not a good question for someone who hasn't learned the functioning of membrane transport. But you can go to your teacher with my explanation and probably get an A
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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Dr.Stein
- King Cobra
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jnkdna wrote:hey doc u act like a teacher even on the internet!! u dont give straight answers! u make sure we understand wat wer asking right? dats good!
I didn't act like a teacher because I am a real teacher, both online and offline. This "teacher attitude" becomes my nature
And my motto is "Dr.Stein will answer your question with question" be careful mwahaha 
Andrew: Enterocyte?
I know it is "gut cell" but just sound 'strange' to me, I never use that term because it is totum pro parte 
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MrMistery
- Inland Taipan
- Posts: 6832
- Joined: Thu Mar 03, 2005 10:18 pm
- Location: Romania(small and unimportant country)
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@Dr.Stein
I like the term, the romanian term is much longer, so it has become a habbit. I use it in english too, even if the english "gut cell" is shorter out of habbit
I like the term, the romanian term is much longer, so it has become a habbit. I use it in english too, even if the english "gut cell" is shorter out of habbit
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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