B2 Organisation Flashcards
(34 cards)
Is this order correct?
Cell - Tissue - Organ - Organ system?
Yes
The organ system works together to make an entire what?
Organism
Enzymes are biological what?
Catalysts
What to enzyme catalysist do to a reaction?
Speed it up
Enzymes are specific, meaning they can only catalyse what?
One reaction
Why are enzymes specific?
The unique shape of the active site
What goes into the active site of the enzyme?
Substrate
When the substrate goes into the enzyme what complex do they form?
Enzyme-substrate complex
What conditions cause an enzyme to denature?
High temp and high + low pH
What happens when the enzyme denatures?
The active site changes shape
Digestive enzymes break what kind of molecules into smaller, soluble ones?
Big
The Enzyme amylase (carbohydrate) breaks down what into sugars?
Starch
The Enzyme protease breaks down what into amino acids?
Protein
The Enzyme Lipase breaks down what into glycerol and fatty acids?
Lipids
What does bile do to digestion?
Speeds it up
Bile speeds up digestion by making the conditions what so enzymes work better?
Alkaline
Bile speeds up digestion by doing what to the fat so theirs a larger surface area for lipase
Emulsifying the fat
What does bile do to the fat to speed up digestion ?
It emulsifies fat
Within what is the trachea, lung, bronchi and alveoli(millions) ?
Lungs
Gas exchange in the alveolus is when gases diffuse between the alveolus and blood,
CO2 is diffused from the blood, what is diffusing into the body?
O2
What type of blood vessel carry’s blood away from the heart?
Arteries
What type of blood vessel carries blood into the heart?
Veins
What type of blood vessel connects the arteries and veins?
Capillaries
Which arteries contain valves to prevent the backflow of blood?
Veins
