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Author Topic: Biology Paper 1 help!  (Read 4021 times)

Offline Mastermind

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Biology Paper 1 help!
« 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?
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Offline Kim

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Re: Biology Paper 1 help!
« Reply #1 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?
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
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Offline Wahab09

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Re: Biology Paper 1 help!
« Reply #2 on: June 04, 2009, 03:35:11 pm »
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
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Offline Wahab09

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Re: Biology Paper 1 help!
« Reply #3 on: June 04, 2009, 03:35:48 pm »
A is wrong kimmy! :D
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Offline Kim

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Re: Biology Paper 1 help!
« Reply #4 on: June 04, 2009, 03:37:05 pm »
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?
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
sorry dude i had done a similar question and confused it wid this!!!
my bad! :'(
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Re: Biology Paper 1 help!
« Reply #5 on: June 04, 2009, 03:38:07 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?

the answer is C..add the two salt values to get the same as cold day..on a hot day, more water is lost by sweat..so to prevent dehydration of the body..less water is there in the urine...and for salts..its mainly..negligible or no sweat is produced in cold weather...so when there is sweat..we know that salts are an important part of sweat..so when sweat is produced..some salts are lost through the sweat..and the rest..through the kidney..
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Offline Mastermind

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Re: Biology Paper 1 help!
« Reply #6 on: June 04, 2009, 03:38:35 pm »
Sorry meant Oct/Nov =P
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Offline Wahab09

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Re: Biology Paper 1 help!
« Reply #7 on: June 04, 2009, 03:38:54 pm »
it isnt B its C.. read my explanation
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Offline Kim

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Re: Biology Paper 1 help!
« Reply #8 on: June 04, 2009, 03:39:03 pm »
cud sum1 explain  the nitrifying denitrifying nitrogen fixing bacteria?

wat does the nucleus in every body cell of a male contain?
X allele
y allele
y chromosome
y gene
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Offline Mastermind

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Re: Biology Paper 1 help!
« Reply #9 on: June 04, 2009, 03:40:01 pm »
Ah thanks insanity-stricken & Wahab, +rep  ;D
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Offline Mastermind

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Re: Biology Paper 1 help!
« Reply #10 on: June 04, 2009, 03:40:31 pm »
Quote from: kim on June 04, 2009, 03:39:03 pm
cud sum1 explain  the nitrifying denitrifying nitrogen fixing bacteria?

wat does the nucleus in every body cell of a male contain?
X allele
y allele
y chromosome
y gene
I replied to tht question in the other thread
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Offline kam

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Re: Biology Paper 1 help!
« Reply #11 on: June 04, 2009, 03:40:50 pm »
right got it now

and kim someone answered ur que at https://studentforums.biz/index.php?topic=2420.msg38514#new
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Offline Kim

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Re: Biology Paper 1 help!
« Reply #12 on: June 04, 2009, 03:41:28 pm »
Quote from: kam on June 04, 2009, 03:40:50 pm
right got it now

and kim someone answered ur que at https://studentforums.biz/index.php?topic=2420.msg38514#new
dude u rock again +rep for u
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Offline Wahab09

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Re: Biology Paper 1 help!
« Reply #13 on: June 04, 2009, 03:42:02 pm »
Kim..
the denitrfying bacteria just convert the nitrates back into nitrogen so its not good.
and the other one is y chromosome.. cuz alleles can be anything!
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Offline Kim

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Re: Biology Paper 1 help!
« Reply #14 on: June 04, 2009, 03:44:14 pm »
Quote from: Wahab09 on June 04, 2009, 03:42:02 pm
Kim..
the denitrfying bacteria just convert the nitrates back into nitrogen so its not good.
and the other one is y chromosome.. cuz alleles can be anything!
\
thank u soooo much i hav bn searching for this ans for a loooooong time
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.
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