If you have a graph (the one we did today was over a time period of 6 secs) there will be a 'wavy' line which spans a particular number of seconds.

E.G The wavy line (inspiration & expiration) spans 5 secs.
There are 60 secs in 1 min SO
60/5 is 12.
You're only counting 1 breath, so 12x1 is 12 and there are 12beats/min

Literally, don't overthink it. I kept overthinking it and wondering why I was the only one getting it wrong :/

Once you think about it logically and sensibly its super easy!

Reply 245

Chloeyah

Original post by lilyobz

what confrences>?!!?! Is the f211's over?

They were in Shaftsbury Avenue London. My bio teacher just said 'hey we're going on this trip, it's compulsory' so we went

They went through each spec point and basically did a crash course in the entire thing in 30 min chunks.

Ask your teacher if there's any mopre

Reply 246

Chloeyah

Original post by Hannah196

Does anyone have the OCR AS Biology (F211) - May 2012 past paper?

Apparently it's hidden and only teachers can get it, we had it today as a mock...

Reply 247

lilyobz

14

Original post by Chloeyah

Apparently it's hidden and only teachers can get it, we had it today as a mock...

how was it?

any tricky questions?

Reply 248

Chloeyah

Original post by lilyobz

how was it?

any tricky questions?

This probably won't make sense but....

The knowledge itself isn't tricky, it's all stuff I knew already but the way it's worded can throw you off.

For example, there was one question about actively loading sugar into transport tissue (phloem), 3 marks.

Well was it about anything, into the companion cell, from the companion cell into the tube? :confused:

I wrote about H+ ions being actively transported out of the companion cell, binding with glucose then being actively loaded back in via a carrier protein.

I tend to do simple answers - at the conference we went to last thurs with OCR they said not to do an essay. 3 marks = 3 points. Lay them out simply.

H+ ions actively transported out - point 1
Ions binding with glucose - point 2
Actively loaded back in via a carrier protein - point 3.

Reply 249

HF1

does anyone have the june 2012 paper for f211biology ocr cells transport and exchange please please please ......

Reply 250

JamesNeedHelp2

5

Original post by HF1

does anyone have the june 2012 paper for f211biology ocr cells transport and exchange please please please ......

Yeah, i am looking for it too, can't seem to find it. :frown:

Reply 251

HF1

what example of extracellular protein?
what is visible on the cell diagram that is not present in prokaryotes?
what extra feature is present in the cytoplasm of prokaryotes?
Breath calculation
What is another name for flunctions in blood?
How does oxygen get into red blood cells?
What happens to elastic fibres in AB?
What is process requires atp? (exocytosis)
What nuclear division (first q was mitosis)
What is a tissue
Define homologous chromosomes
Tick box- with the mammalian system
Last q- Sucrose and the mouthpiece dunno the question
Describe the pressure changes using the graph.
Explain the pressure changes using the graph.
Why is it important to have low pressure in capillaries.
What is shown by the letter on the graph (was tidal volume)
Why is there residual volume in lungs
Suggest how student can stop red blood cells from bursting.
5 mark q about plant and animal cells in water
Expiration question
Name process used by root hair cells and their structure.
Transport of sucrose into phloem (H+ stuff)
Why is it important for dna to replicate
What are A B C (dunno the actual letters) shown on the diagram
Function of golgi apparatus
Funtion and location of squamous and cilia cells
What type of tissue transports sugars? phloem
What sugar is transported? Sucrose

thats all i found but i really need the paper :frown:

Reply 252

JamesNeedHelp2

5

Original post by HF1

what example of extracellular protein?
what is visible on the cell diagram that is not present in prokaryotes?
what extra feature is present in the cytoplasm of prokaryotes?
Breath calculation
What is another name for flunctions in blood?
How does oxygen get into red blood cells?
What happens to elastic fibres in AB?
What is process requires atp? (exocytosis)
What nuclear division (first q was mitosis)
What is a tissue
Define homologous chromosomes
Tick box- with the mammalian system
Last q- Sucrose and the mouthpiece dunno the question
Describe the pressure changes using the graph.
Explain the pressure changes using the graph.
Why is it important to have low pressure in capillaries.
What is shown by the letter on the graph (was tidal volume)
Why is there residual volume in lungs
Suggest how student can stop red blood cells from bursting.
5 mark q about plant and animal cells in water
Expiration question
Name process used by root hair cells and their structure.
Transport of sucrose into phloem (H+ stuff)
Why is it important for dna to replicate
What are A B C (dunno the actual letters) shown on the diagram
Function of golgi apparatus
Funtion and location of squamous and cilia cells
What type of tissue transports sugars? phloem
What sugar is transported? Sucrose

thats all i found but i really need the paper :frown:

Wow thanks at least we have most of the questions. I will let you know if i do find the paper though.

Reply 253

JamesNeedHelp2

5

Questions for anyone who wants to answer;

1) How is an arteries structure related to its function? (5 marks)

2) How is the action of the heart initiated and coordinated (8 marks)

3) Why is it important that large organisms have a closed circulatory system? (3 marks)

4) Describe how blood flows in a open circulatory system? (3 marks)

5) What is found in blood but not tissue fluid? ( 1 mark)

Reply 254

JamesNeedHelp2

5

Original post by Chloeyah

If you have a graph (the one we did today was over a time period of 6 secs) there will be a 'wavy' line which spans a particular number of seconds.

E.G The wavy line (inspiration & expiration) spans 5 secs.
There are 60 secs in 1 min SO
60/5 is 12.
You're only counting 1 breath, so 12x1 is 12 and there are 12beats/min

Literally, don't overthink it. I kept overthinking it and wondering why I was the only one getting it wrong :/

Once you think about it logically and sensibly its super easy!

Thanks for that. Im assuming that i am meant to use the formula:

60s/ time for one heart beat?

Reply 255

Konflict

7

Original post by HF1

What is another name for flunctions in blood?

What does this mean? :confused:

Reply 256

imthe12

11

Why is it important to have low pressure in capillaries ?

Clear answer please

Reply 257

ErHi?

OP

7

Original post by imthe12

Why is it important to have low pressure in capillaries ?

Clear answer please

The capillaries do not have any collagen/smooth muscle to support it, it only has endothelium. If the blood was at high pressure it could destroy/damage the capillaries as they are too weak/small to be able to withstand the pressure.

Reply 258

imthe12

11

Original post by ErHi?

The capillaries do not have any collagen/smooth muscle to support it, it only has endothelium. If the blood was at high pressure it could destroy/damage the capillaries as they are too weak/small to be able to withstand the pressure.