elliebrown1203
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#1
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#1
How did you find the exam today? Contribute your questions and answers so we can put together an unofficial mark scheme!
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elliebrown1203
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#2
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#2
What is diffusion?
The movement of particles from an area of a higher concentration to an area of a lower concentration.

What is active transport?
The movement of particles against the concentration gradient. It require energy.

How did the coeliac disease mean the person lost weight, had not enough vitamins and minerals and felt tired?
Decreased surface area= less diffusion so less substances taken in by body- more excreted. Less capillaries= higher concentration of substances in blood so slower diffusion because less steep concentration gradient. Tiredness because of lack of glucose.

Different parts of heart:
Left ventricle
Aorta

Uses of valves in heart
Prevent back flow so blood can be pumped around body

Waste products 6 marker
Carbon dioxide from respiration released by lungs during exhalation
Urea from amino acids in liver released by kidneys during ultrafiltration, then send to bladder as urine and excreted
Excess water and ions lost in ultrafiltration and selective reabsorbtion in kidneys then in excretion

Warming up
Vasoconstriction- vessels further from skin so less heat lost via radiation

How shivering warms you up
Muscles contract, which requires energy from respiration, which is an exothermic reaction, so releases heat and warms you up

How brain detects temperature of blood
Thermoregulatory centre in brain detects temperature of blood that flows past it through receptors

How pancreas reacts to over supply of glucose
Released insulin, which causes glucose to be taken up by cells and glucose to be converted to glycogen and stored in muscles

Effect of sulfur dioxide
Acid rain

How to increase rate of photosynthesis
Lighter
Warmer
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ffox
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#3
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#3
rip me on the 6 marker
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elliebrown1203
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#4
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#4
(Original post by ffox)
rip me on the 6 marker
What did you put?!
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Devvo2000
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#5
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#5
(Original post by elliebrown1203)
What is diffusion?
The movement of particles from an area of a higher concentration to an area of a lower concentration.

What is active transport?
The movement of particles against the concentration gradient. It require energy.

How did the coeliac disease mean the person lost weight, had not enough vitamins and minerals and felt tired?
Decreased surface area= less diffusion so less substances taken in by body- more excreted. Less capillaries= higher concentration of substances in blood so slower diffusion because less steep concentration gradient. Tiredness because of lack of glucose.

Different parts of heart:
Left ventricle
Aorta

Uses of ventricles in heart
Prevent back flow so blood can be pumped around body.

Platelets:
Small fragments of cells.

Photosynthesis word equation
Carbon dioxide+Water-->Glucose+Oxygen

Why he thought it was plant D
Lots of stomata means lots of water lost through diffusion, so biggest decrease in mass

Parts of plant and what they transport
Xylem- water
Phloem- ions, glucose

Waste products 6 marker
Carbon dioxide from respiration released by lungs during exhalation
Urea from amino acids in liver released by kidneys during ultrafiltration, then send to bladder as urine and excreted
Excess water and ions lost in ultrafiltration and selective reabsorbtion in kidneys then in excretion

Warming up
Vasoconstriction- vessels further from skin so less heat lost via radiation

How shivering warms you up
Muscles contract, which requires energy from respiration, which is an exothermic reaction, so releases heat and warms you up

How brain detects temperature of blood
Thermoregulatory centre in brain detects temperature of blood that flows past it through receptors

How pancreas reacts to over supply of glucose
Released insulin, which causes glucose to be taken up by cells and glucose to be converted to glycogen and stored in muscles

Effect of sulfur dioxide
Acid rain

How to increase rate of photosynthesis
Lighter
Warmer
Was there a question about platelets ?!?
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elliebrown1203
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#6
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#6
(Original post by Devvo2000)
Was there a question about platelets ?!?
Was a multiple choice one and you just had to tick one of the three boxes
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Heidi-Heather
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#7
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#7
I didn't see a platelets question . . .
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Tanvirul5
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#8
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#8
(Original post by Devvo2000)
Was there a question about platelets ?!?
no this girl is dumb, most of the answers did not come up in the exam.
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Ifailedagain
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#9
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#9
Where was the question about platelets?
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Becky438
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#10
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#10
(Original post by Devvo2000)
Was there a question about platelets ?!?
No it was about plasma
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elliebrown1203
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#11
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#11
(Original post by Ifailedagain)
Where was the question about platelets?
It was just multiple choice out of 3 statements
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Btstrash
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#12
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#12
(Original post by ffox)
rip me on the 6 marsaker
Same lol all i could think about was urine didnt think abou carbon dioxide
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Btstrash
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#13
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#13
(Original post by elliebrown1203)
It was just multiple choice out of 3 statements
I didnt see this question either damn
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3317752
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#14
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#14
(Original post by elliebrown1203)
It was just multiple choice out of 3 statements
what was the question?
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Ifailedagain
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#15
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#15
Are u on something about this platelets question? Like weed
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faloodeh
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#16
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#16
(Original post by elliebrown1203)
was a multiple choice one and you just had to tick one of the three boxes
i did not see this
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elliebrown1203
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#17
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#17
(Original post by Pretish)
what was the question?
Something like, which statement is true about platelets?
- They have a nucleus
-Can't remember this one
-they are small fragments of cells
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3317752
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#18
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#18
(Original post by elliebrown1203)
Something like, which statement is true about platelets?
- They have a nucleus
-Can't remember this one
-they are small fragments of cells
pretty sure that wasnt in the paper...
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KayKay66
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#19
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#19
The only multiple choice i saw was about acid rain??
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Gabzinc
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#20
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#20
There was NOT a question about platelets, in my paper at least.
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