B3 - Living and Growing

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in exercise, what do muscles not receive enough of?
oxygen
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when does ANAEROBIC RESPIRATION happen
when muscles dont recieve enough oxygen, it uses aerobic respiration as well
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what are two disadvantages of ANaerobic respiration over aerobic respiration
-lactic acid that is made by ANaerobic respiration builds up in muscles, causing pain and fatigue. ANaerobic respiration releases much less energy per glucose molecule then aerobic respiration
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what is the name of the incomplete breakdown of glucose which results in the build up of lactic acid
oxygen debt
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during the recovery the breathing rate and heart rate stay high so that:
-rapid blood flow can carry lactic acid away to the liver. -extra oxygen can be supplied, enabling the liver to break down the lactic acid
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what experiments can you do to measure the rate of respiration?
to measure how much oxygen is used up: the faster it is consumed, the faster the respiration rate. -the rate at which carbon dioxide is made
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how can you calculate respiratory quotient?
RQ=carbon dioxide produced
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what is metabolic rate?
is the sum of all reactions that are occurring in the body
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what happens if the metabolic rate changes?
if it is high, more oxygen is needed, as aerobic rate is faster
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why does change in temperature and PH change respiration rate
they affect enzymes, and respiration is controlled by enzymes
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what are advantages of being multi cellular (as humans are)
it allows an organism to become larger and more complex. it also allows different cells to take on different jobs.
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name of something that allows cells to take on different cells?
cell differentiation
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when an organism becomes multi cellular, what are the systems they need
-allow communication between all the cells in the body. -supply all the cells with enough nutrents -control exchanges with the environment such as heat and gases
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whats the process that produces new cells for growth called
mitosis
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cells that are made by mitosis are...
genetically identical. before cells divide, DNA replication must take place. this is so that each cell produced still has
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in mammals body cells have two copies of each chromosome, what are they called?
diploid cell
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what happens before mitosis
DNA is replicated
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how is DNA replicated?
-the two strands of the DNA molecule 'unzipping' to form single strands. -new double strands forming by DNA bases lining up in complementary pairings
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Card 2

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when does ANAEROBIC RESPIRATION happen

Back

when muscles dont recieve enough oxygen, it uses aerobic respiration as well

Card 3

Front

what are two disadvantages of ANaerobic respiration over aerobic respiration

Back

Preview of the front of card 3

Card 4

Front

what is the name of the incomplete breakdown of glucose which results in the build up of lactic acid

Back

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Card 5

Front

during the recovery the breathing rate and heart rate stay high so that:

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