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.
23,849,880 questions answered
Popular Conversations
3. The owner s equity division should contain what account(s)? A. 31 ...
Weegy: B. 31 P. Woodsley?Capital 32 Merchant?s Bank
2/6/2016 3:21:32 AM| 1 Answers
Crisis is synonymous with conflict. true or ...
Weegy: Communication is synonymous with conversation, delivery, transmission and many more.
2/6/2016 7:55:12 AM| 1 Answers
The events in a short story follow a natural, logical order. True or ...
Weegy: true The events in a short story follow a natural, logical order.
2/6/2016 7:51:04 AM| 1 Answers
Which term refers to all areas of Earth where life exists? biosphere ...
Weegy: Biome: a major ecological community, extending over a large area and usually characterized by a dominant ...
2/6/2016 7:56:20 AM| 1 Answers
Weegy Stuff
S
Points 214 [Total 611] Ratings 0 Comments 214 Invitations 0 Offline
S
P
P
Points 142 [Total 949] Ratings 0 Comments 142 Invitations 0 Offline
S
1
L
L
P
R
P
L
P
Points 106 [Total 11279] Ratings 0 Comments 106 Invitations 0 Offline
S
L
P
Points 46 [Total 2114] Ratings 0 Comments 46 Invitations 0 Offline
S
Points 27 [Total 37] Ratings 0 Comments 27 Invitations 0 Offline
S
Points 4 [Total 904] Ratings 0 Comments 4 Invitations 0 Offline
S
Points 4 [Total 4] Ratings 0 Comments 4 Invitations 0 Offline
S
R
Points 2 [Total 438] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 1 [Total 2] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)