Let’s go through the worksheet step by step, filling in each blank with the correct term based on basic biology of respiration.
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Section 1: Respiration is the controlled release of energy from food
- The food involved in respiration is usually
glucose.
→ Glucose is the main sugar cells break down to get energy.
- Internal respiration is controlled by
enzymes which allow energy to be released in
small steps.
→ Enzymes make sure energy isn’t all released at once (which would waste it or damage the cell). Small steps let us capture energy safely.
- The energy is trapped in molecules called
ATP.
→ ATP = Adenosine Triphosphate — the “energy currency” of the cell.
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Section 2: Types of Respiration
- Aerobic Respiration – the release of energy from food in the
presence of oxygen.
→ “Aero” means air/oxygen. So this needs oxygen.
- Anaerobic Respiration – The release of energy from food
without the presence of oxygen.
→ “An” means without. This happens when there’s no oxygen.
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Section 3: Aerobic Respiration
- Most living things get energy from aerobic respiration and are called
aerobes.
→ Organisms that need oxygen to live.
- The energy stored in
chemical bonds in glucose is released and used to make
ATP.
→ Energy is locked in the bonds between atoms in glucose. Breaking them releases energy to build ATP.
- When ATP breaks down it
releases energy for all the reactions in a cell such as movement of muscles, growth of new cells, etc.
→ ATP → ADP + phosphate + energy. That energy powers cellular work.
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Section 4: Equation for Aerobic Respiration
We write the word equation first:
Glucose + Oxygen → Carbon dioxide + Water + Energy
Then the balanced chemical equation:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy (as ATP)
So fill in:
First line:
Glucose + Oxygen → Carbon dioxide + Water + Energy
Second line:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
*(Note: Sometimes “Energy” is written instead of “ATP”, but since earlier sections mention ATP, using ATP here is accurate.)*
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Section 5: Efficiency of Aerobic Respiration
- Aerobic respiration is relatively
efficient, 40% of the energy in glucose is used to make ATP.
→ Compared to anaerobic, aerobic gets much more energy out of glucose.
- Any energy not used to produce ATP is
released as heat.
→ Heat warms our bodies — that’s why we feel warm after exercise!
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Final Answer:
Respiration is the controlled release of energy from food
• The food involved in respiration is usually
glucose
• Internal respiration is controlled by
enzymes which allow energy to be released in
small steps
• The energy is trapped in molecules called
ATP
Types of Respiration
• Aerobic Respiration – the release of energy from food in the
presence of oxygen
• Anaerobic Respiration – The release of energy from food
without the presence of oxygen
Aerobic Respiration
• Most living things get energy from aerobic respiration and are called
aerobes
• The energy stored in
chemical bonds in glucose is released and used to make
ATP
• When ATP breaks down it
releases energy for all the reactions in a cell such as movement of muscles, growth of new cells, etc.
Equation for Aerobic Respiration
Glucose + Oxygen → Carbon dioxide + Water + Energy
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
• Aerobic respiration is relatively
efficient, 40% of the energy in glucose is used to make ATP
• Any energy not used to produce ATP is
released as heat
Parent Tip: Review the logic above to help your child master the concept of respiration worksheet.
