A group of different tissues that work together to perform a certain function
1 of 14
Why do enzymes have an optimum pH?
If the pH is too low or too high it can interfere with the bonds holding the enzyme togther.
2 of 14
An enzyme-controlled reaction was carried out at pH 4. After 60 secibdsm 33cm^3 of a product had been released. Calculate the rate of reaction in cm^3/s
0.55
3 of 14
Bile is a product of the liver. What is it's role in digestion?
Neutralises the acid to make conidtions alkaline.
4 of 14
Name the 3 parts of the digestive system that produce protease enzymes
Pancreas, stomach, small intestine
5 of 14
Name the chemical used to test a sample for the prescence of starch
Iodine
6 of 14
During a 12 min run, Harvey took 495 breaths. Calculate his average breathing rates in breaths per minutes.
41.25
7 of 14
What is the function of the coronary arteries?
Surround heart, giving all oxygen needed.
8 of 14
How are veins adapted to carry blood back to the heart?
Bigger lumen, valves, elastic fibres
9 of 14
What is the purpose of platelets in blood?
Help the blood clot
10 of 14
The 3 ways in which RBCs are adapted to carry blood:
Biconcave, large surface area, no nucleus
11 of 14
How can stents be used to reduce the risk of heart attacks?
Keep the arteries open
12 of 14
How do fault heart valvaes lead to poor circulation?
Won't open properly, blood doesn't circulate as effectively.
13 of 14
Why does light intensity affect the rate of transpiration?
Light opens the stomata, allowing water to escape.
14 of 14
Other cards in this set
Card 2
Front
Why do enzymes have an optimum pH?
Back
If the pH is too low or too high it can interfere with the bonds holding the enzyme togther.
Card 3
Front
An enzyme-controlled reaction was carried out at pH 4. After 60 secibdsm 33cm^3 of a product had been released. Calculate the rate of reaction in cm^3/s
Back
Card 4
Front
Bile is a product of the liver. What is it's role in digestion?
Back
Card 5
Front
Name the 3 parts of the digestive system that produce protease enzymes
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