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AS Biology P1 MCQs Preparation Thread

HubbaBubba

HubbaBubba

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Ikram Khaliq said:
Which symptoms may be seen in a person affected by chronic obstructive pulmonary disease
(COPD)?
1 persistent cough
2 less elastic alveoli
3 increased risk of lung infection
4 shortness of breath
Click to expand...

2. Less Elastic Alveoli, because Emphysema is part of COPD
4. Shortness of breath
 
Ikram Khaliq

Ikram Khaliq

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HubbaBubba said:
2. Less Elastic Alveoli, because Emphysema is part of COPD
Click to expand...

you have to choose more than one. :p wait i'll post the whole question.
here you go:

Which symptoms may be seen in a person affected by chronic obstructive pulmonary disease
(COPD)?
1 persistent cough
2 less elastic alveoli
3 increased risk of lung infection
4 shortness of breath

A 1 and 4 only
B 1, 2 and 3 only
C 2, 3 and 4 only
D 1, 2, 3 and 4
 
1357911

1357911

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Which year is this ques from?????
Ikram Khaliq said:
you have to choose more than one. :p wait i'll post the whole question.
here you go:

Which symptoms may be seen in a person affected by chronic obstructive pulmonary disease
(COPD)?
1 persistent cough
2 less elastic alveoli
3 increased risk of lung infection
4 shortness of breath

A 1 and 4 only
B 1, 2 and 3 only
C 2, 3 and 4 only
D 1, 2, 3 and 4
Click to expand...
 
HubbaBubba

HubbaBubba

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Ikram Khaliq said:
you have to choose more than one. :p wait i'll post the whole question.
here you go:

Which symptoms may be seen in a person affected by chronic obstructive pulmonary disease
(COPD)?
1 persistent cough
2 less elastic alveoli
3 increased risk of lung infection
4 shortness of breath

A 1 and 4 only
B 1, 2 and 3 only
C 2, 3 and 4 only
D 1, 2, 3 and 4
Click to expand...

Yeah I realised after I posted sorry :p
Uhm now that I think about it, all of them are symptoms of COPD. 2, and 4 caused by Emphysema and 1, 3 caused by chronic bronchitus
 
Alicee

Alicee

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would anyone be kind enough to write a short summary of what happens as a pathogen enters our body including the function of B and T lymphocytes ?
 
HubbaBubba

HubbaBubba

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Alicee said:
would anyone be kind enough to write a short summary of what happens as a pathogen enters our body including the function of B and T lymphocytes ?
Click to expand...

èWhen a macrophage engulfs a pathogen, it can expose the antigen to a T-helper cell which releases cytokines.
èThis stimulates the B cells to divide into plasma cells and secrete antibodies. Other B cells become memory cells.

èKiller T-Cells search for foreign antigens on cells, and attach to it, releasing toxic substances.
 
HubbaBubba

HubbaBubba

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Ikram Khaliq said:
O/N12 p13 the answer is D btw :p i don't get it waisay. how can less elastic alveoli be seen? xD
Click to expand...

Mm, doctors make the person who's sick breath into a spirometer to check how much air he can inhale/exhale. Usually small volumes indicate that fibres are not elastic
 
Alicee

Alicee

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HubbaBubba said:
èWhen a macrophage engulfs a pathogen, it can expose the antigen to a T-helper cell which releases cytokines.
èThis stimulates the B cells to divide into plasma cells and secrete antibodies. Other B cells become memory cells.

èKiller T-Cells search for foreign antigens on cells, and attach to it, releasing toxic substances.
Click to expand...

thanks a lot!! :D
 
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