Respiration

Question 1

Word equation for respiration

Answer 1

Oxygen + glucose -> carbon dioxide + water + energy (atp)

Question 2

Balanced equation for respiration

Answer 2

6O2 + C6H12O6 -> 6CO2 + 6H2O + ATP

Question 3

Word equation for anaerobic respiration in muscles

Answer 3

Glucose -> lactic acid + energy (ATP)

Question 4

Word equation for anaerobic respiration in yeast

Answer 4

Glucose -> Ethanol + Carbon Dioxide + energy

Question 5

What is respiration?

Answer 5

A chemical reaction in all living cells.

Question 6

What organelles are responsible for respiration?

Answer 6

Mitochondria

Question 7

What type of reaction is respiration?

Answer 7

Exothermic

Question 8

What do organisms use the energy released from respiration for?

Answer 8

Active transport (e.g. absorpion of digested food)
Movement (e.g. to allow muscles to contract)
To provide heat (in the case of endotherms)
Growth
Reproduction

Question 9

What is anaerobic respiration in yeast used for?

Answer 9

Baking (released carbon dioxide in the prosess is responsible for air pockets in bread)

Brewing (ethonol is the basis of many alcoholic drinks)

Question 10

Mug root beer

Answer 10

Mug root beer

Question 11

What apparatus can be used to demonstrate anaerobic respiration in yeast?

Answer 11

Check your notes, until i give in amd pay for this.

Question 12

When demonstrating anaerobic respiration in yeast, why is the solution boiled?

Answer 12

To kill microorganisms and remove dissolved oxygen

Question 13

When demonstrating anaerobic respiration in yeast, why is the solition cooled before adding yeast

Answer 13

So they dont die (that would be sad)

Question 14

When demonstrating anaerobic respiration in yeast, what is the purpose of the layer of oil

Answer 14

To prevent oxygen from entering

Question 15

List the parts of the respiratiory system (use a diagram)

Answer 15

You have the diagram, justblook at that-

Question 16

List the adaptations if the alveoli

Answer 16

Provide a large surface area (around 80m2)

Walls only one cell thick (reduces distance the gasses have to move)

Moist (dissolves gasses, increasing the rate of diffusion)

Walls highly permeable

Steep concentration gradient (blood low in O2, high in CO2. Alveoli high in O2, low in CO2)

Question 17

What is the site of gas exchange in a plant’s leaves?

Answer 17

Spongy mesophyll

Question 18

Describe the process of inhaling

Answer 18

Diaphragm contracts (flattens) and intercostal muscles contract, moving the rib cage up and out

Volume of chest cavity is increased

Pressure is decreased

Air is drawn into the lungs

Question 19

Describe the process if exhaling

Answer 19

Diaphragm relaxes (moves upwards into dome shape) and intercostal muscles relax (ribcage moves down and in)

Volume in chest cavity decreases

Pressure is increased

Air is pushed out of the lungs

Question 20

Describe the experiment used to find the factors affecting yeast respiration.

Answer 20

1. Mix yeast into a solution of glucose and water - this provides the glucose and oxygen needed for respiration.
2. Leave at room temperature for 1 hour.
3. Place mixture in a test tube.
4. Place a boiling tube over the test tube and invert - the test tube will now be upside down.
5. Place in water bath at 10°C.
6. Measure the height of the bubble at the top of the test tube.
7. After 30 minutes, measure the height of the bubble at the top of the test tube.
8. Repeat steps 2 to 7 at different temperatures (e.g. 20°C, 30°C, 40°C and 50°C).
9. Calculate the change in bubble height and record results in a table.
10. Draw a graph of the change in height against the temperature.