B12 - Respiration

Question 1

What are the uses of energy in living organisms

Answer 1

• muscle contraction
• protein synthesis (growth and repair)
• cell division
• passage of nerve impulses
• maintenance of a constant body temperature
• active transport

Question 2

What is aerobic respiration

Answer 2

A series of chemical reactions in cells that use oxygen to break down nutrient molecules to release energy

Question 3

What is the word equation for aerobic respiration

Answer 3

Glucose + oxygen —> carbon dioxide + water

Question 4

What is the balanced symbol equation for aerobic respiration

Answer 4

C₆H₁₂O₆ + 6O₂ —> 6CO₂ + 6H₂O

Question 5

What is anaerobic respiration

Answer 5

Chemical reactions in cells that break down nutrient molecules to release energy without using oxygen

Question 6

What is the difference between anaerobic and aerobic respiration

Answer 6

• Anaerobic respiration releases much less energy per glucose molecule than aerobic respiration
• you can only do anaerobic respiration for a short period of time as the build up of lactic acid causes fatigue and pain, aerobic respiration occurs all the time
• Aerobic respiration produces carbon dioxide and water, while anaerobic respiration produces lactic acid
• aerobic respiration completely breaks down glucose while in anaerobic respiration there is an incomplete break down of glucose

Question 7

What is the word equation for anaerobic respiration in muscles during vigorous exercise

Answer 7

Glucose —> lactic acid

Question 8

What is oxygen debt

Answer 8

It is when the lactic acid builds up in muscles and blood during vigorous exercise causing an oxygen debt

Question 9

How is the oxygen dept removed after exercise

Answer 9

• continuation of fast heart rate to transport lactic acid in the blood from the muscles to the liver to be broken down
• continuation of deeper and faster breathing to supply oxygen for aerobic respiration of lactic acid
• aerobic respiration of lactic acid in the liver

Question 10

Where in cells does aerobic respiration take place

Answer 10

The mitochondria

Question 11

What type of reaction is respiration

Answer 11

Chemical, and exothermic

Question 12

What are some of the ways to test for aerobic respiration

Answer 12

• A series of containers which you pull air through and remove all the carbon dioxide before it reaches the specimen
• a sealed tube, with lime water at the bottom and gauze to hold the specimen

Question 13

What are some of the ways to test for aerobic respiration

Answer 13

• A series of containers which you pull air through and remove all the carbon dioxide before it reaches the specimen
• a sealed tube, with lime water at the bottom and gauze to hold the specimen