cell transport

Discussion of all aspects of cellular structure, physiology and communication.

Moderators: Leonid, amiradm, BioTeam

Post Reply
vaytfam
Garter
Garter
Posts: 1
Joined: Thu Jan 19, 2006 2:20 am

cell transport

Post by vaytfam » Thu Jan 19, 2006 2:23 am

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

User avatar
Dr.Stein
King Cobra
King Cobra
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia
Contact:

Post by Dr.Stein » Thu Jan 19, 2006 6:12 am

I DO know the answer, before I tell you, could you please tell me the definition of those four options? ;)
Image

User avatar
jnkdna
King Cobra
King Cobra
Posts: 1141
Joined: Tue Nov 08, 2005 12:44 pm
Location: London, UK
Contact:

Post by jnkdna » Thu Jan 19, 2006 10:52 am

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!
d nyt is darkest just before the dawn

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Thu Jan 19, 2006 11:08 am

I guess it's because the question looks more like a home work question :wink:
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Thu Jan 19, 2006 7:55 pm

actually it's neither :lol: :lol: :lol:
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 :lol:
"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

User avatar
Dr.Stein
King Cobra
King Cobra
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia
Contact:

Post by Dr.Stein » Fri Jan 20, 2006 6:36 am

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 8) And my motto is "Dr.Stein will answer your question with question" be careful mwahaha :twisted: :D

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 :lol:
Image

User avatar
jnkdna
King Cobra
King Cobra
Posts: 1141
Joined: Tue Nov 08, 2005 12:44 pm
Location: London, UK
Contact:

Post by jnkdna » Fri Jan 20, 2006 10:45 am

u make life so complicated doc!!
d nyt is darkest just before the dawn

User avatar
victor
King Cobra
King Cobra
Posts: 2668
Joined: Sat Apr 30, 2005 12:01 pm
Location: Yogyakarta, Indonesia..
Contact:

Post by victor » Fri Jan 20, 2006 12:36 pm

yeah..yeah...I agree....life is already complicated and you make it far more complicated...hahaha
Q: Why are chemists great for solving problems?
A: They have all the solutions.

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Fri Jan 20, 2006 6:21 pm

@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 :lol:
"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

mikegugugu
Garter
Garter
Posts: 3
Joined: Sun Jan 22, 2006 7:39 am

Post by mikegugugu » Sun Jan 22, 2006 7:50 am

C I guess

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests