Biology question (1 Viewer)

[phongkhamnguyentrai]

The given solution. Is D

 

[jimmysmith560]

Aldosterone acts on the distal tubule, not the collecting duct (as seen with C). Large plasma proteins do not move into the bowman's capsule, making the answer D.

I hope this helps!

 

[jimmysmith560]

Which one is correct for the Bowman’s capsule part. And why are the others wrong

"Sodium ions are at the same concentration as in plasma" is obviously the correct one for Bowman's capsule, and is consistent with D.

I believe A is incorrect for the same reason as C - Aldosterone acts on the distal tubule, not the collecting duct.

I'm pretty sure that B being wrong has to do with plasma proteins being at the same concentration as in plasma. As I mentioned earlier, large plasma proteins do not move into the bowman's capsule.

 

[Eagle Mum]

Which one is correct for the Bowman’s capsule part. And why are the others wrong

In questions like this, only one statement (of the three) has to be incorrect for the option to be incorrect.

 

[jimmysmith560]

Aw sweet thanks jimmy

Why is that obviously the correct one? Do you know of where I can some reading on the concentration of stuff in blood and Bowman’s capsule

No worries!

In terms of the concentration of substances in the blood, the kidneys remove wastes and extra fluid from the body. Kidneys also remove acid that is produced by the cells of the body and maintain a healthy balance of water, salts, and minerals, such as sodium, calcium, phosphorus, and potassium in the blood. The Bowman capsule is part of the nephron. The nephron is the functional unit of the kidney; it is responsible for the actual filtration and purification of the blood. Sodium is a mineral, and therefore comes under the classification of substances that the kidneys maintain a healthy balance of, therefore making it correct.

Here are a few links and documents you can have a look at that contain information about the concentration of substances in the blood as well as Bowman's capsule:

https://www.gov.nl.ca/education/files/k12_curriculum_guides_science_grade8_artificial_organs_stse_unit_4.pdf

Your Kidneys & How They Work - NIDDK

Learn how your kidneys filter blood, why kidneys are important, and how kidneys help maintain a healthy balance of water, salts, and minerals in your body.

www.niddk.nih.gov

Bowman’s Capsule | Anatomy & Function | Britannica

Bowman’s capsule, double-walled cuplike structure that makes up part of the nephron, the filtration structure in the mammalian kidney that generates urine in the process of removing waste and excess substances from the blood. The capsule encloses a cluster of capillaries called the glomerulus.

www.britannica.com

I hope this helps!

 

[CM_Tutor]

Bear in mind that excessive glucose levels (in uncontrolled diabetes, for example), leads the kidneys to eliminate glucose in urine, so glucose can be disposed of via the kidneys as well as being retained.

 

[CM_Tutor]

You do biology as well?

Most definitely not. I have the qualifications and experience to claim expertise in chemistry and in high school / some uni levels of maths. I have never studied biology formally, but I have studied science education and many biological situations from a chemical perspective.

I also have a reasonable breadth of general knowledge and have picked up quite a bit that is medically-related.

 

[Eagle Mum]

Hmm, I’m not too sure about this one unfortunately. Sorry about that

Perhaps @Eagle Mum would like to confirm whether this is accurate?

Yes, all small water soluble ions can move freely through the membrane of the Bowman’s capsule.
Amino acids are also small enough to get through, but as you’ve already stated, plasma proteins are too large to get through the intact membrane. When the kidneys become damaged (by toxins, uncontrolled diabetes etc) albumin is the first plasma protein to ‘leak’ through the membrane. It is the smallest of the proteins, but at 66 500 daltons, it is large compared to the ions (sodium, chloride, potassium, bicarbonate, calcium, phosphate, etc), to give an idea of the size of species that are selectively filtered or retained.

 

[[Blank]]

Yes, all small water soluble ions can move freely through the membrane of the Bowman’s capsule.
Amino acids are also small enough to get through, but as you’ve already stated, plasma proteins are too large to get through the intact membrane. When the kidneys become damaged (by toxins, uncontrolled diabetes etc) albumin is the first plasma protein to ‘leak’ through the membrane. It is the smallest of the proteins, but at 66 500 daltons, it is large compared to the ions (sodium, chloride, potassium, bicarbonate, calcium, phosphate, etc), to give an idea of the size of species that are selectively filtered or retained.

Who ARE YOU?! Are you also a teacher?

 

[Eagle Mum]

Who ARE YOU?! Are you also a teacher?

Not a high school teacher, so my posts may not necessarily match NESA curriculum.

Like a few of the older members (although I'm probably oldest?) who post in this forum, I'm just providing a bit of help, when I have time, and if I happen to know something about the topic(s). Answering questions in this forum is a bit more interesting than doing crossword puzzles & hopefully is of use to some students.

 

[[Blank]]

Not a high school teacher, so my posts may not necessarily match NESA curriculum.

Like a few of the older members (although I'm probably oldest?) who post in this forum, I'm just providing a bit of help, when I have time, and if I happen to know something about the topic(s). Answering questions in this forum is a bit more interesting than doing crossword puzzles & hopefully is of use to some students.

What do you do as a living? Is it anything to do with teaching even though you aren't one for high school?

 

[[Blank]]

Blank who do you think is more powerful, you or eagle mum

Eagle mum, for now.

 

[Eagle Mum]

What do you do as a living? Is it anything to do with teaching even though you aren't one for high school?

Well,.. that might be identifying.
Teaching isn't my main activity, but I have done ad hoc teaching & supervision at tertiary & post grad levels. I am considering doing volunteer teaching at our local high school (the way other parents help with reading in early primary, but at the other end of schooling as I think it would make better use of my skills), but can't really make regular commitments until my youngest has finished high school.

 

[[Blank]]

Well,.. that might be identifying.
Teaching isn't my main activity, but I have done ad hoc teaching & supervision at tertiary & post grad levels. I am considering doing volunteer teaching at our local high school (the way other parents help with reading in early primary, but at the other end of schooling as I think it would make better use of my skills), but can't really make regular commitments until my youngest has finished high school.

Of course, but be sure to hold onto that awesome dream! Me and my arch-nemesis Hiva also plan to become teachers some day too!

 

[Eagle Mum]

Of course, but be sure to hold onto that awesome dream! Me and my arch-nemesis Hiva also plan to become teachers some day too!

I have no intention of retraining as a teacher at my age. Besides, a teaching position would entail a high administrative burden. I have to deal with that in my current occupation - when I volunteer, I can focus mainly on teaching.

 

[[Blank]]

I have no intention of retraining as a teacher at my age. Besides, a teaching position would entail a high administrative burden. I have to deal with that in my current occupation - when I volunteer, I can focus mainly on teaching.

That makes sense, the more time goes by, the less obligations you want to hold - that's the same for me. Either way, just do what your want with complete honesty to yourself, that's all.