Otago HSFY chat - archive

[Proshot]

I'm extremely confused..

 

[Profiterole]

I'm extremely confused..

Join the club mate! (the question is really vague... <_<)

 

[Nimbus2000]

That's what I also thought, I agree with you and jono, the question is *really* vague!

However, I just thought I'd add (sorry for being nitpicky) TLRs are found on both the plasma membrane as well as the nuclear membrane (Intracellular TLRs)

 

[Wongtong]

Hi Prof. Griffin,

I was wondering - is serum sickness an example of type III or type II hypersensitivity allergy? In the slides it says type II but when I search for it on the internet, it comes up with type III.


Thanks!


​

Yes in fact its type III, because type II is cytotoxic activity mediated by IgG and Complement. Good of you to know the difference.

Frank.



​

 

[hermafish]

Great thanks bro Wow frank griffen emailed you, awesome!

 

[Profiterole]

Hi Prof. Griffin,

I was wondering - is serum sickness an example of type III or type II hypersensitivity allergy? In the slides it says type II but when I search for it on the internet, it comes up with type III.


Thanks!


​

​

Yes in fact its type III, because type II is cytotoxic activity mediated by IgG and Complement. Good of you to know the difference.

Frank.

​

The Griffen has spoken. That is all.

 

[Bluerock]

Anybody know how specific these MCQ's on Immunology are? And I know the lecturers mention that it is focussed on in the final exam.. looking through the past ones everything seems fairly proportioned so is it just the MCQ's?
Getting so annoyed with Immunology. So many mistakes, like the evening lecture that outlined the complement cascade didn't actually explain the difference between the different pathways, so without anything in the textbook have had to rely on the lab notes :/

 

[Sam]

Anybody know how specific these MCQ's on Immunology are? And I know the lecturers mention that it is focussed on in the final exam.. looking through the past ones everything seems fairly proportioned so is it just the MCQ's?
Getting so annoyed with Immunology. So many mistakes, like the evening lecture that outlined the complement cascade didn't actually explain the difference between the different pathways, so without anything in the textbook have had to rely on the lab notes :/

I agree, it was taught really badly. From what I understand, the harder questions from the previous terms tests are repeated (sometimes) and the rest of the MCQs are focused on the immune system. No clue as to how difficult they are D:

 

[greenglacier]

Hope revision is going well for you guys. Just a reminder of our question bank thread: https://www.medstudentsonline.com.au/f115/hsfy-question-bank-thread-23686/

The 66 HUBS MCQs there (including 10 on immunology) might be handy for your revision! It's like peerwise, but useful

 

[Wongtong]

Hope revision is going well for you guys. Just a reminder of our question bank thread: https://www.medstudentsonline.com.au/f115/hsfy-question-bank-thread-23686/

The 66 HUBS MCQs there (including 10 on immunology) might be handy for your revision! It's like peerwise, but useful

Thanks greenglacier, forgot all about these questions

 

[frootloop]

I agree, it was taught really badly. From what I understand, the harder questions from the previous terms tests are repeated (sometimes) and the rest of the MCQs are focused on the immune system. No clue as to how difficult they are D:

The MCQs in the HUBS final exam are, by and large, quite a lot easier (or at least, quite a lot less ridiculous) than the terms tests questions. You'll still need to know all of it, obviously, but, last year at least, the MCQs in the final were pretty straightforward.

 

[Sam]

The MCQs in the HUBS final exam are, by and large, quite a lot easier (or at least, quite a lot less ridiculous) than the terms tests questions. You'll still need to know all of it, obviously, but, last year at least, the MCQs in the final were pretty straightforward.

Cheers for clearing that up

 

[Kception]

Here's a question causing some debate on Peerwise...

A triploid plant is formed through fertilisation of a diploid gamete (2n=16) with a haploid gamete (n=8). If the average number of chromosomes in the gametes of this triploid is 9, how many chromosomes are lost on average during the full course of a single meiotic division.

Options
A - 3
B - 6
C - 7
D - 15

I feel that the answer is B - but if someone could confirm this, that would be great​

 

[Sam]

Here's a question causing some debate on Peerwise...

A triploid plant is formed through fertilisation of a diploid gamete (2n=16) with a haploid gamete (n=8). If the average number of chromosomes in the gametes of this triploid is 9, how many chromosomes are lost on average during the full course of a single meiotic division.

Options
A - 3
B - 6
C - 7
D - 15

I feel that the answer is B - but if someone could confirm this, that would be great​

What is the actual answer?

 

[Profiterole]

What is the actual answer?

Its from one of the final exams, so no answer is given...

 

[Sam]

Its from one of the final exams, so no answer is given...

Oh lame, I would have gone for A.

edit: after more discussion, I think the answer is C. You take any 2n=x and make them into n= (as they would be when the zygote is formed), then we calculate the difference between the 9 chromosome version and what they should be.

 

[Profiterole]

Here's a question causing some debate on Peerwise...

A triploid plant is formed through fertilisation of a diploid gamete (2n=16) with a haploid gamete (n=8). If the average number of chromosomes in the gametes of this triploid is 9, how many chromosomes are lost on average during the full course of a single meiotic division.

Options
A - 3
B - 6
C - 7
D - 15

I feel that the answer is B - but if someone could confirm this, that would be great​

Well, from Lecture 21's Karpechenko's Raddish, you just add them together, so you get 3n=24, hence the difference is 15? (D)

 

[Proshot]

Don't you add the gametes together to give a triploid with (16+8) = 24 = n. The resulting zygote has 24 and if it produces gametes this is halved to 12 (gametes = n/2). The question tells you the resulting gametes in fact only have 9 chromosomes so the difference is 3 chromosomes and there are 2 gametes produced from meiosis so 2x3=6 so B?

 

[Profiterole]

Don't you add the gametes together to give a triploid with (16+8) = 24 = n. The resulting zygote has 24 and if it produces gametes this is halved to 12 (gametes = n/2). The question tells you the resulting gametes in fact only have 9 chromosomes so the difference is 3 chromosomes and there are 2 gametes produced from meiosis so 2x3=6 so B?

um... Assuming you dont just add them. Since one of them is a diploid, in meiosis, it would be: 16/2=n=8, and the other is also n=8. Then the zygote wound have 16, with a difference of 7?

 

[Kception]

Don't you add the gametes together to give a triploid with (16+8) = 24 = n. The resulting zygote has 24 and if it produces gametes this is halved to 12 (gametes = n/2). The question tells you the resulting gametes in fact only have 9 chromosomes so the difference is 3 chromosomes and there are 2 gametes produced from meiosis so 2x3=6 so B?

This is the approach that I took as well - I do think you have to add the (16+8) to form the triploid in the first place... don't you?