Fuels - Human Body + Photosynthesis

Question 1

What si the primary fuel for the human body?

Answer 1

Glucose - C₆H₁₂O₆

Glucose is a Carbohydrate

Question 2

What is the process of converting glucose into useable enrgy called?

Answer 2

Aerobic respiration reaction

Is exothermic reaction

Question 3

How is Glucose sourced in our body?

Answer 3

From Carbohydrates Starch and Gycogen:
* Starch - Found from diet
* Glycogen - Polymer of glucose, found from diet

Question 4

Give equation for Respiration

Answer 4

C6H12O6(aq) + 6O2(g) → 6CO2(g) + 6H2O(l)

Question 5

What are other sources of fuel for human body?

Answer 5

Fatty Acids - such as stearic acid
Protein

Question 6

Describe the two types of Fatty Acids

Answer 6

1. Saturated fatty acids - Contain carbon-to-carbon double bonds
2. Unsaturated fatty acids - Contain only single carbon-to-carbon bonds

Question 7

Describe protein as a source of energy and why it is not commonly used by body.

Answer 7

• Used as fuel as last resort
• Proetin is important structural component of body

Question 8

Rank the fuels used by body in a heirarchy (highest preference to lowest)

Answer 8

1. Glucose (Carbohydrate)
2. Glycogen - converted to glucose (carbohydrate)
3. Fatty Acids (Lipids)
4. Protein (Amino acids that become ketone)

Question 9

Rank the energy content of lipids, protein and carbohydrates from highest to lowest

Answer 9

Lipids > Proteins > Carbohydrates

Question 10

What is the purpose of Photosynthesis?

Answer 10

To produce Glucose

Question 11

What type of energies are transformed in photosynthesis?

Answer 11

Light energy -> Chemical Energy

Question 12

Give equation for Photosynthesis

Answer 12

6CO2(g) + 6H2O(l) -> C6H12O6(aq) + 6O2(g)

Chlorophyll is catalyst for photosynthesis

Question 12

What type of reaction is Photosynthesis?

Answer 12

Redox Reaction - Carbon Dioxide is reduced
Endothermic Reaction - Energy absorbed