[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?


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?


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





Absorption of digested

food into blood stream

Food “burnt” by cells to release energy

Transport to every cell in the body


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!


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 ……………


Where does glucose breakdown / cellular respiration take place?

2 answers!


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...............


How do cells get their energy?

Digested sugars are carried in our blood to every cell in our body.

su

ga

r


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



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?


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


What is aerobic respiration?

oxygen

carbondioxide

glucose

+

+

water

(energy)

+


• 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


• Why does our heart rate and breathing change when we exercise?

Describe – what happens?

Explain – why does it happen?


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


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?


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 ..................................…………………………..…………………………..



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.

[PPT]1. Animal and Plant Cells - Saint Vincent College · Web viewTitle 1. Animal and Plant Cells...

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