Chapter 7: Respiration ( aerobic/anaerobic )in humans

Question 1

What is respiration?

Answer 1

Respiration is the process of breaking down food molecules such as glucose to release energy.

Question 2

What is the energy from respiration used for?

Answer 2

Muscular contractions, cell division, and active transport, etc

Question 3

What are the 2 types of respiration?

Answer 3

Aerobic and anaerobic respiration

Question 4

What is the difference between aerobic and anaerobic respiration?

Answer 4

Aerobic involves breakdown of glucose in the presence of oxygen, while anaerobic respiration involves the breakdown of glucose in the absence of oxygen.

Aerobic produces carbon dioxide and water as waste products, while anaerobic produces lactic acid as the waste product.

Aerobic releases a large amount of energy, while anaerobic does not. (+ anaerobic takes place in cytoplasm)

Question 5

What is the chemical equation of aerobic respiration?

Answer 5

glucose+oxygen->carbon dioxide+water+large amount of energy

Question 6

What is the chemical equation of anaerobic respiration?

Answer 6

glucose->lactic acid+small amount of energy

Question 7

What happens during exercise?

Answer 7

Breathing and heart rate will increase, to increase intake of oxygen and to increase rate of oxygen supply to muscle cells, which will increase the rate of aerobic respiration.

Question 8

Is there a limit to how fast your heart can beat and you can breathe?

Answer 8

Yes

Question 9

What takes place when there is an increased demand during exercise?

Answer 9

The oxygen supply to the muscles is insufficient, so anaerobic respiration would take place to meet the increased demand of oxygen. ( production of lactic acid)

Question 10

What is the name of build-up of lactic acid?

Answer 10

Lactic Acidosis

Question 11

What are the symptoms of lactic acidosis?

Answer 11

• nausea and vomiting
• exhaustion and fatigue
• fast, deep breathing
• increasing weakness and drowsiness
• oliguria ( low urine output)

Question 12

How does the production of lactic acid from anaerobic help to produce oxygen?

Answer 12

lactic acid is removed from the muscles and is transported to the liver, to be converted back into glucose, transported back into the muscles. ( this entire process requires oxygen, as muscles incur an oxygen debt )