Question and answer
explain the mechanism of excretion by the lungs, kidney, and skin
The lungs are important for excretion of carbon dioxide (the respiratory acid) and there is a huge amount of this to be excreted: at least 12,000 to 13,000 mmols/day. In contrast the kidneys are responsible for excretion of the fixed acids and this [ is also a critical role even though the amounts involved (70-100 mmols/day) are much smaller. The main reason for this renal importance is because
there is no other way to excrete these acids and it should be appreciated that the amounts involved are still very large when compared to the plasma [H+] of only 40 nanomoles/litre. There is a second extremely important role that the kidneys play in acid-base balance, namely the reabsorption of the filtered bicarbonate. Bicarbonate is the predominant extracellular buffer against the fixed acids and it important that its plasma concentration should be defended against renal loss. In acid-base balance, the kidney is responsible for 2 major activities: * Reabsorption of filtered bicarbonate: 4,000 to 5,000 mmol/day * Excretion of the fixed acids (acid anion and associated H+): about 1 mmol/kg/day. Both these processes involve secretion of H+ into the lumen by the renal tubule cells but only the second leads to excretion of H+ from the body. The renal mechanisms involved in acid-base balance can be difficult to understand so as a simplification we will consider the processes occurring in the kidney as involving 2 aspects: * Proximal tubular mechanism * Distal tubular mechanism ]
Get an answer
Original conversation
User: explain the mechanism of excretion by the lungs, kidney, and skin

Weegy: The lungs are important for excretion of carbon dioxide (the respiratory acid) and there is a huge amount of this to be excreted: at least 12,000 to 13,000 mmols/day. In contrast the kidneys are responsible for excretion of the fixed acids and this [ is also a critical role even though the amounts involved (70-100 mmols/day) are much smaller. The main reason for this renal importance is because there is no other way to excrete these acids and it should be appreciated that the amounts involved are still very large when compared to the plasma [H+] of only 40 nanomoles/litre. There is a second extremely important role that the kidneys play in acid-base balance, namely the reabsorption of the filtered bicarbonate. Bicarbonate is the predominant extracellular buffer against the fixed acids and it important that its plasma concentration should be defended against renal loss. In acid-base balance, the kidney is responsible for 2 major activities: * Reabsorption of filtered bicarbonate: 4,000 to 5,000 mmol/day * Excretion of the fixed acids (acid anion and associated H+): about 1 mmol/kg/day. Both these processes involve secretion of H+ into the lumen by the renal tubule cells but only the second leads to excretion of H+ from the body. The renal mechanisms involved in acid-base balance can be difficult to understand so as a simplification we will consider the processes occurring in the kidney as involving 2 aspects: * Proximal tubular mechanism * Distal tubular mechanism ]
Expert answered|IfNotSo|Points 4674|

User: thanks alot!!!!! :-)

Weegy: you're welcome
Expert answered|IfNotSo|Points 4674|

Question
Asked 10/6/2010 7:52:42 AM
Updated 6/30/2011 4:37:41 AM
2 Answers/Comments
New answers
Rating

There are no new answers.

Comments
useless
Added 6/30/2011 4:37:12 AM
useless
Added 6/30/2011 4:37:12 AM
such a fudu ans
Added 6/30/2011 4:37:41 AM
Add an answer or comment
Log in or sign up first.
17,589,637 questions answered
Popular Conversations
A list of potential sources of information for a paper is a(n) ...
Weegy: A list of potential sources of information for a paper in annotated bibliography. User: An index to ...
9/29/2014 2:50:04 PM| 4 Answers
You've settled on an idea for an essay to write. What should you do ...
Weegy: D.) Conduct interviews, do some research, ask questions, and make a plan. User: To make sure your reader ...
9/29/2014 5:55:28 PM| 4 Answers
What is the square root of 6000?
9/29/2014 2:39:45 PM| 3 Answers
Because the subject of a composition is like a crystal with many ...
Weegy: Because the subject of a composition is like a crystal with many facets, you should A. offer your reader ideas ...
9/29/2014 7:06:34 PM| 3 Answers
The densest ocean water is generally found a. in the surface ...
Weegy: A. in the surface zone User: In which zone is ocean temperature most affected by the weather? a. transition ...
9/30/2014 6:07:25 AM| 3 Answers
The pressure of ocean water increases as depth increases. User: The ...
Weegy: It originates in the Gulf of Mexico and, as the Florida Current, passes through the Straits of Florida and then ...
9/30/2014 6:27:02 AM| 3 Answers
In the Roman Republic, ____________ did not have power in the ...
Weegy: In the Roman Republic,non-citizens did not have power in the government.
9/29/2014 5:48:03 AM| 2 Answers
Weegy Stuff
S
R
L
1
1
P
C
1
P
1
1
L
P
C
P
C
1
P
C
L
P
C
1
P
C
P
C
P
C
L
Points 3249 [Total 27647]| Ratings 8| Comments 3169| Invitations 0|Offline
S
L
1
L
P
C
1
Points 2934 [Total 9465]| Ratings 12| Comments 2814| Invitations 0|Offline
S
L
C
P
C
1
L
L
P
C
1
Points 2732 [Total 18671]| Ratings 18| Comments 2552| Invitations 0|Offline
S
L
P
C
L
P
C
P
C
L
P
C
P
C
P
C
Points 2664 [Total 19836]| Ratings 12| Comments 2544| Invitations 0|Offline
S
L
1
1
1
1
L
1
L
Points 2548 [Total 12328]| Ratings 0| Comments 2548| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 917 [Total 12163]| Ratings 0| Comments 917| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
L
P
C
P
C
P
C
P
C
Points 864 [Total 19395]| Ratings 2| Comments 844| Invitations 0|Offline
S
L
Points 733 [Total 1402]| Ratings 0| Comments 733| Invitations 0|Offline
S
1
L
L
Points 632 [Total 5755]| Ratings 4| Comments 592| Invitations 0|Offline
S
P
C
L
P
L
1
Points 176 [Total 6233]| Ratings 2| Comments 156| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.