Ch9 Respiration

Question 1

Aerobic respiration reaction

Answer 1

exothermic reaction

transfers energy to the environment

Question 2

aerobic respiration formula word equation

Answer 2

glucose + oxygen -> carbon dioxide + water

Question 3

aerobic respiration formula symbol equation

Answer 3

C6H12O6 + 6O2 -> 6CO2 + 6H2O

Question 4

Uses of respiration

Answer 4

1. make muscles contract
2. maintaining constant internal body temperature
3. in plants- active transport in root hair cells and making amino acids
4. synthesis reactions- building up smaller molecules into larger ones

Question 5

Response to excercise

Answer 5

Heart rate increases and arteries dilate to increase blood flow
Breathing depth and rate increases(O2 supply increases and CO2 removed faster)
Glycogen stored in muscles is converted back into glucose to supply energy for respiration

Question 6

Anaerobic respiration word equation

Answer 6

glucose -> lactic acid + ‘energy’

Question 7

lactic acid

Answer 7

causes muscle fatigue and cramps

Question 8

Oxygen debt

Answer 8

Increased breathing after excercise

It breaks down lactic acid

Question 9

Oxygen debt equation

Answer 9

lactic acid + oxygen -> carbon dioxide + water

Question 10

Fermentation equation

Answer 10

glucose -> ethanol + carbon dioxide

Question 11

liver metabolic reactions

Answer 11

1. detoxifying poisonous substances such as ethanol
2. passing breakdown products into the blood so they can be excreted in urine
3. breaking down old, worn out blood cells and storing iron until it is needed to synthesise more blood cells

Question 12

liver’s role

Answer 12

converts lactic acid into glucose