chemistry and biology question need helps

Watch
As.1997
Badges: 16
Rep:
?
#1
Report Thread starter 9 months ago
#1
For question 11, the answer is B. I understand why it is B but I am still curious in knowing what "acidification" means. Can someone please explain what acidification is in this particular context.

For questions 24, the answer is C. Can someone please explain how they would work this out.
Attached files
Last edited by As.1997; 9 months ago
0
reply
mqb2766
Badges: 18
Rep:
?
#2
Report 9 months ago
#2
(Original post by As.1997)
For question 11, the answer is B. I understand why it is B but I am still curious in knowing what "acidification" means. Can someone please explain what acidification is in this particular context.

For questions 24, the answer is C. Can someone please explain how they would work this out.
Can't really help with the first one, but for the leg one, just flex some muscles in your leg and see what happens to the part below.
1) At the ankle, the foot rotates backwards (go on tip toes), so in the lower leg the calf T contracts / tenses and shin S extends / relaxes
2) At the knee, the lower leg rotates forward, so in the upper leg R contracts and P relaxes
3) At the butt, the upper leg rotates backwards, so Q must contract

There is a hint in picture, fatter muscles in the 2nd image compared to the 1st have contracted and thinner muscles have relaxed. However, the right way to think about it is which way does the joint (lower body part) rotate, so which muscle must contract and as muscles work in pairs, the other must relax.
Last edited by mqb2766; 9 months ago
0
reply
As.1997
Badges: 16
Rep:
?
#3
Report Thread starter 9 months ago
#3
(Original post by mqb2766)
Can't really help with the first one, but for the leg one, just flex some muscles in your leg and see what happens to the part below.
1) At the ankle, the foot rotates backwards (go on tip toes), so in the lower leg the calf T contracts / tenses and shin S extends / relaxes
2) At the knee, the lower leg rotates forward, so in the upper leg R contracts and P relaxes
3) At the butt, the upper leg rotates backwards, so Q must contract

There is a hint in picture, fatter muscles in the 2nd image compared to the 1st have contracted and thinner muscles have relaxed. However, the right way to think about it is which way does the joint (lower body part) rotate, so which muscle must contract and as muscles work in pairs, the other must relax.
This is beautiful. Thank you.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Should there be a new university admissions system that ditches predicted grades?

No, I think predicted grades should still be used to make offers (627)
33.67%
Yes, I like the idea of applying to uni after I received my grades (PQA) (784)
42.11%
Yes, I like the idea of receiving offers only after I receive my grades (PQO) (368)
19.76%
I think there is a better option than the ones suggested (let us know in the thread!) (83)
4.46%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise