Qualification > Sciences
Biology Paper 1 help!
Mastermind:
This is a question from Paper 1 2008, May/June:
23 The table shows the amount of water and salt lost from the kidneys and skin on a hot day and on
a cold day. Food and drink intake are the same on both days.
| water lost from | water lost from | salt lost from | salt lost from
\ kidneys/dm3 / skin/dm3 / kidney/g / skin/g
cold day| 1.8 | 0.0 | 20.2 | 0.0
hot day | 0.4 | 2.3 | 14.4 | 5.8
What do these results show?
A) Less water is lost from the kidneys on a cold day than on a hot day.
B)More salt is lost from the kidneys on a hot day than on a cold day.
C) The total amount of salt lost each day is the same.
D) Water is not lost from the kidneys on hot days.
& If you could tell me, why is more water lost in the kidneys on a cold day than on a hot day?
& why is more salt lost from the kidneys on a cold day than on a hot day?
Kim:
--- Quote from: Mastermind on June 04, 2009, 03:31:38 pm ---This is a question from Paper 1 2008, May/June:
23 The table shows the amount of water and salt lost from the kidneys and skin on a hot day and on
a cold day. Food and drink intake are the same on both days.
| water lost from | water lost from | salt lost from | salt lost from
\ kidneys/dm3 / skin/dm3 / kidney/g / skin/g
cold day| 1.8 | 0.0 | 20.2 | 0.0
hot day | 0.4 | 2.3 | 14.4 | 5.8
What do these results show?
A) Less water is lost from the kidneys on a cold day than on a hot day.
B)More salt is lost from the kidneys on a hot day than on a cold day.
C) The total amount of salt lost each day is the same.
D) Water is not lost from the kidneys on hot days.
& If you could tell me, why is more water lost in the kidneys on a cold day than on a hot day?
& why is more salt lost from the kidneys on a cold day than on a hot day?
--- End quote ---
the answer is A because on hot days u need water because most of the water is lost as sweat so the body retains the water for osmoregulation
salts part i dunno
Wahab09:
this isnt june.. ive just done june 08..
the answer is C..
as in a hot day the total amount of salt lost is 14.4+5.8= 20.2
and in a cold day its just 20.2 so theyre equal!
good luck m8
Wahab09:
A is wrong kimmy! :D
Kim:
--- Quote from: kim on June 04, 2009, 03:34:16 pm ---
--- Quote from: Mastermind on June 04, 2009, 03:31:38 pm ---This is a question from Paper 1 2008, May/June:
23 The table shows the amount of water and salt lost from the kidneys and skin on a hot day and on
a cold day. Food and drink intake are the same on both days.
| water lost from | water lost from | salt lost from | salt lost from
\ kidneys/dm3 / skin/dm3 / kidney/g / skin/g
cold day| 1.8 | 0.0 | 20.2 | 0.0
hot day | 0.4 | 2.3 | 14.4 | 5.8
What do these results show?
A) Less water is lost from the kidneys on a cold day than on a hot day.
B)More salt is lost from the kidneys on a hot day than on a cold day.
C) The total amount of salt lost each day is the same.
D) Water is not lost from the kidneys on hot days.
& If you could tell me, why is more water lost in the kidneys on a cold day than on a hot day?
& why is more salt lost from the kidneys on a cold day than on a hot day?
--- End quote ---
the answer is A because on hot days u need water because most of the water is lost as sweat so the body retains the water for osmoregulation
salts part i dunno
--- End quote ---
sorry dude i had done a similar question and confused it wid this!!!
my bad! :'(
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