[ppt]1. animal and plant cells - saint vincent college · web viewtitle 1. animal and plant cells...
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What is the digested food used for in our bodies?
Ranulph Fiennes on a solo walk across the Arctic
On this journey Ranulph Fiennes consumed an average of 10,000 calories per day.
1. What did he need these calories for?
2. What types of food would you recommend for Ranulph to eat on his journey?
3. When you do heavy exercise what happens to your heartbeat, breathing and appetite?
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Today’s topics
Respiration
Learning objectives:
How does food energy get to our cells?
How do our cells release the energy in our food?
What do cells need the energy in food for?
How can we compare the energy content of different foods?
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How do our cells get the energy out of our food?
Digestion (break food into small pieces)
Chemical & mechanical
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How do our cells get the energy out of our food?
Digestion (break food into small pieces)
Chemical & mechanical
Absorption of digested
food into blood stream
http://www.youtube.com/watch?v=b20VRR9C37Q
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How do our cells get the energy out of our food?
Digestion (break food into small pieces)
Chemical & mechanical
Absorption of digested
food into blood stream
Food “burnt” by cells to release energy
Transport to every cell in the body
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3 Golden rules of respiration
Respiration means “burning food to release energy”
Respiration happens in every cell of the body 24/7
Respiration is GO!
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Where is the energy in glucose?
Glucose
Molecules of glucose have ……….. stored in the bonds which hold them together.
Breaking up the molecule breaks ………. and releases the stored ……………
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Where does glucose breakdown / cellular respiration take place?
2 answers!
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To 1.13
Video to recap respiration key ideashttp://www.youtube.com/watch?v=JEnjph9miK4
Mitochondria are full of enzymes which can help break down g................. and release its stored e...............
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How do cells get their energy?
Digested sugars are carried in our blood to every cell in our body.
su
ga
r
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http://www.youtube.com/watch?v=WXOBJEXxNEo
Why is the respiration aerobic?
Digested sugars are carried in our blood to every cell in our body.
sugar
The blood also delivers ............ to every cell in our body. o
xy
ge
n
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How do cells get their energy?
The oxygen is used to break the ............. molecules down and release the .............. stored in them
sugar
ox
yg
en
+What are the two waste products
from this reaction?
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How do cells get their energy?The process of releasing the energy
stored in sugar is known as RESPIRATIONsugar
ox
yg
en
+
The reaction produces 2 waste substances........... & ....................................
Carbon dioxide
water
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What is aerobic respiration?
oxygen
carbondioxide
glucose
+
+
water
(energy)
+
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• What is the energy released in respiration used for?
Build larger molecules from smaller ones
Enable muscles to contract
Maintain body temperatureCombine sugars and nitrates to make protein
All organisms
Plants only
Animals only
Mammals and birds only
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• Why does our heart rate and breathing change when we exercise?
Describe – what happens?
Explain – why does it happen?
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How do cells get energy when oxygen runs low?
Usain Bolt breathes once during the whole 100m sprint. How does this provide enough oxygen for his muscle cells to release energy?
http://www.youtube.com/watch?v=By1JQFxfLMM
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During intense exercise cells can break down glucose without any ………. This is called ………………………….. respiration
Glucose energy + lactic acid
The glucose is not ……………… broken down.
…….. energy is released than in aerobic resp.
……… acid is produced in this type of respiration
What’s released when cells respire without oxygen?
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QuestionIndependent Variable
Dependent Variable
Control variables If control variables are not all kept the
same they might .........................
......................................................................................................................................................
ReliabilityIf results are “reliable” it means ....................................................................................................................................You can check the reliability of your results by ..................................…………………………..…………………………..
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How do cells get their energy?
All organisms need energy to survive.
• A lot of our food contains glucose which acts as a small store of …………………
• Plants and animals continually release the……………….
stored in glucose in a process called ………………………
• Respiration happens in ………………….. cell of the body
• The glucose breaks up when its hit by ………………….. The process releases ………… …………………and water.