Unit 12 - respiration

Question 1

how energy from respiration is used in organisms

Answer 1

1. muscle contractions
2. cell devision
3. protein synthesis
4. active transport
5. growth
6. nerve passage
7. maintenance of body temp

Question 2

aerobic respiration defenition

Answer 2

the chemical reaction in cells that use oxygen to break down nutrient molecules to release energy

Question 3

aerobic respiration word and symbol equation

Answer 3

glucose + oxygen -> carbon dioxide + water
C6H12O6 +6O2 -> 6CO2 + 6H2O

Question 4

pros and cons of aerobic respiration

Answer 4

pros : releases more energy per glucose molecule ( 32 atp per glucose molecule )
cons : requires oxygen

Question 5

anaerobic respiration defenition

Answer 5

the chemical reactions in cells that breakdown nutrient molecules to release energy without using oxygen

Question 6

anaerobic respiration in yeast word and symbol equation

Answer 6

glucose -> ethanol + carbon dioxide
C6H12O6 -> 2C2H5OH + 2CO2

Question 7

word equation anaerobic respiration in muscle cells

Answer 7

glucose -> lactic acid

Question 8

pros and cons of anaerobic respiration

Answer 8

pros: doesn’t require oxygen
cons: produces much less energy per glucose molecules ( 2 atp / glucose molecule ) .
produces lactic acid creating an oxygen debt that must be paid off.

Question 9

how we recover from oxygen debt (3)

Answer 9

1. continue fast heart rate to transport lactic acid in the blood from the muscles to liver faster
2. continue deeper and faster breathing to supply oxygen for aerobic respiration of lactic acid back to pyruvate
3. aerobic respiration of lactic acid in the liver

Question 10

respiration defenition

Answer 10

chemical reactions that breakdown glucose to release energy inside the cell

Question 11

what does respiration use

Answer 11

enzymes