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[harrygt]

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1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

 

[pistolpete007]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

 

[wkawk2416]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

 

[Sublimation]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidsu results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II


Answers are in red....the first one is a complete guess..

 

[harrygt]

Noone has got the answer for the first two questions right by far.

 

[osimsDDS]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark...i believe sharks are cartilegenous which would decrease the calcium in the body making them hypotonic to the hypertonic marine enviornment, thus water would leave the shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute urine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

nice harry very nice

 

[osimsDDS]

crap i was torn between marine shark and marine bony fish...i guess its marine bony fish then

 

[Glycogen]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

 

[harrygt]

crap i was torn between marine shark and marine bony fish...i guess its marine bony fish then

neither of them are the correct answer.

 

[osimsDDS]

is the first one right?

 

[Glycogen]

neither of them are the correct answer.

It has be shark.Shark in vertebrae and so will have urine,I'm just not sure about freshwater!!!!

 

[harrygt]

is the first one right?

No, noone has got the first two question right yet. I got the first one and third one right, when I was taking the test. BUt the second one is confusing. It's actually a very tricky question.

 

[Danny289]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

for second one

 

[Sublimation]

is it a salmon in freshwater?

 

[harrygt]

for second one

Right! Salmon would produce less urine [we are talking about urine not urea!] because it is excreting ammonia which diffuses to the water. The other choices produce urea which needs to be dissolved in water before it gets out of the body [Higher volume of urine]. Remember urea can't get out of body in the solid phase, therefore, the fish should use some of it's body water to excrete urea.
What about the answer for the first question. Anyone?

 

[Danny289]

is it a salmon in freshwater?

yes for production they migrate to fersh water and have very dilute urine.

 

[acupofchai]

how are diabetes and low ADH related?

 

[osimsDDS]

thats the most ridiculous question ive ever seen in my life, anyways where did you get these questions??? thanks

 

[harrygt]

how are diabetes and low ADH related?

This is an analytical question, and it is also a different type of diabetes that we have not learnt before. Do NOT try to apply your previous knowledge to this question, as you can see the question is giving us what is going on. try to apply your knowledge of the application of ADH and urine dilution. That's it.

 

[harrygt]

thats the most ridiculous question ive ever seen in my life, anyways where did you get these questions??? thanks

I got the questions from Campbell Bio book, edition 8th, which is the reference book for the biology part of the DAT.😎

 

[Mstoothlady2012]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network - not this b/c earthworm have capillary network as well
b. forms urine by changing the composition of fluid inside the tubule - hmm not sure if earthworms do this or not
c. functions in both osmoregulation and the excretion of nitrogenous wastes - can't be this b/c i believe earthworm does this as well
d. receives filtrate from blood instead of coelomic fluid. - can't be this b/c the question is other way around
e. has a transport epithelium - i don't even understand what this means

I have never seen question like this 😀 but by process of elimination is can eliminate a,c,d btw b & e...b looks more believable.

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

no idea 😱

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

Nice! but the first question is too detailed....you think there is a chance of something like this to show up?

 

[Sublimation]

how are diabetes and low ADH related?

ppl with DI excrete severely dilute urine, and therefore its caused by a deficiency in ADH. the kidney does not reabsorb any water and instead it leaves the body resulting in diluted urine.

 

[harrygt]

Nice! but the first question is too detailed....you think there is a chance of something like this to show up?

I don't know. I got the first one right at my first shot. It is the choice that says ..."receives filtrate from blood instead of coelom fluid".
The filtrate comes from the ceolom fluid in earthworms, not from an afferent arteriole.

 

[Mstoothlady2012]

I don't know. I got the first one right at my first shot. It is the choice that says ..."receives filtrate from blood instead of coelom fluid".
The filtrate comes from the ceolom fluid in earthworms, not from an afferent arteriole.

Right! that's true for earthworms but I thought the question is asking about mammalian nephron

Unlike an earthworm's metanephridia, a mammalian nephron

 

[shoombol tallah]

1) Unlike an earthworm's metanephridia, a mammalian nephron
a. is intimately associated with a capilllary network
b. forms urine by changing the composition of fluid inside the tubule
c. functions in both osmoregulation and the excretion of nitrogenous wastes
d. receives filtrate from blood instead of coelomic fluid.
e. has a transport epithelium

2) Which of the following animals generally has the lowest volume of urine production
a. a marine shark
b. a salmon in freshwater
c. a marine bony fish
d. a freshwater bony fish
e. a shark inhabiting freshwater Lake Nicaragua

3. A clinical condition known as diabetes insipidus results in the production of large volumes of dilute rine. Which of the following is consistent with this condition?
a. high concentration of sodium in the urine
b. very low production of ADH
c. overproduction of ADH
d. high production of aldosterone
e. high production of angiotensin II

so when is your test harry?

 

[Mstoothlady2012]

Right! that's true for earthworms but I thought the question is asking about mammalian nephron

Unlike an earthworm's metanephridia, a mammalian nephron

oh damn i read the answer choice otherway around lol

 

[harrygt]

It's right misstoothy. Read it again carefully. Filtrate comes from coelmo in earthworm, and from blood in mammalians. joing the choice with the sentence in the question and read it carefully. Nothiing is wrong there.

 

[Mstoothlady2012]

It's right misstoothy. Read it again carefully. Filtrate comes from coelmo in earthworm, and from blood in mammalians. joing the choice with the sentence in the question and read it carefully. Nothiing is wrong there.

Yea I realized...I read the answer choice other way around...shoot!!! I knew the answer

 

[harrygt]

so when is your test harry?

un 22nd man. What about yours?

 

[harrygt]

Yea I realized...I read the answer choice other way around...shoot!!! I knew the answer

Yeah this sucks, especially if you read it the other way on DAT. It might cost you a couple of digits on the bio score😱

 

[shoombol tallah]

un 22nd man. What about yours?

I'm shooting for the 30th but there is so much stuff that i want to go over one more time and not enough hours in the day to do it lol

 

[Aceofspades]

Right! Salmon would produce less urine [we are talking about urine not urea!] because it is excreting ammonia which diffuses to the water. The other choices produce urea which needs to be dissolved in water before it gets out of the body [Higher volume of urine]. Remember urea can't get out of body in the solid phase, therefore, the fish should use some of it's body water to excrete urea.
What about the answer for the first question. Anyone?

Um... arguing between urine and urea is pure semantics.

From dictionary.com Urine - A liquid containing multiple waste products of metabolism, especially urea and other nitrogenous compounds, that are filtered from the blood by the kidneys. This suggests urea is part of urine

From Wikipedia.org Although urine is excreted as a paste (uric acid) by most birds, it is commonly excreted as a fluid varying in color from clear, when dilute, to a dark amber, when concentrated. This suggests uric acid is part of urine.

Essentially, urine is a general term for nitrogen containing waste and it includes urea, uric acid, ammonia, and other nitrogen containing compounds. They are both urine. Uric acid is a solid whereas urea is an aqueous solution. Organisms excreting via uric acid (like birds) will produce less urine than organisms excreting via urea.

In addition, I would think that organisms living in freshwater environments will excrete more urine because they take in more water from their hypotonic environment. Organisms living in saltwater environments should excrete less urine because they are losing water to their hypertonic environments. To top it off larger organisms should secrete more urine than smaller organisms because they are physically bigger.

Ammonia can be excreted without dissolving it in water (unlike urea), but I was under the impression uric acid was a pretty compact way of getting rid of urine as well.

 

[AdaAda87]

Are we suppose to know this for the DATs? I know its a stupid question, but is it??? ahhhh depressing...

 

[Danny289]

I'm shooting for the 30th but there is so much stuff that i want to go over one more time and not enough hours in the day to do it lol

if you don't have enough hours a day wake up one hour early every morning then you will have one more hour every day. 🙂

 

[Danny289]

Are we suppose to know this for the DATs? I know its a stupid question, but is it??? ahhhh depressing...

know the big picture and how everything is related to each other.

 

[harrygt]

Are we suppose to know this for the DATs? I know its a stupid question, but is it??? ahhhh depressing...

I don't know. These were the multiple choices from the reference bio book of DAT. I did not make them up. Don't get depressed though! These were like the 3 hardest questions out of 10. I'm sure you would answer the other 7 correctly.

 

[harrygt]

Um... arguing between urine and urea is pure semantics.

From dictionary.com Urine - A liquid containing multiple waste products of metabolism, especially urea and other nitrogenous compounds, that are filtered from the blood by the kidneys. This suggests urea is part of urine

From Wikipedia.org Although urine is excreted as a paste (uric acid) by most birds, it is commonly excreted as a fluid varying in color from clear, when dilute, to a dark amber, when concentrated. This suggests uric acid is part of urine.

Essentially, urine is a general term for nitrogen containing waste and it includes urea, uric acid, ammonia, and other nitrogen containing compounds. They are both urine. Uric acid is a solid whereas urea is an aqueous solution. Organisms excreting via uric acid (like birds) will produce less urine than organisms excreting via urea.

In addition, I would think that organisms living in freshwater environments will excrete more urine because they take in more water from their hypotonic environment. Organisms living in saltwater environments should excrete less urine because they are losing water to their hypertonic environments. To top it off larger organisms should secrete more urine than smaller organisms because they are physically bigger.

Ammonia can be excreted without dissolving it in water (unlike urea), but I was under the impression uric acid was a pretty compact way of getting rid of urine as well.

The urine of most type of fishes is ammonia only. No Urea in those!