Biology- Respiration

Question 1

Anaerobic respiration in animals? (symbols)

Answer 1

C6H1206 - 2C3H6O3

Question 2

Anaerobic in animals? (word)

Answer 2

glucose to lactic acid + energy released (50% used by cell, 50% lost as heat)

Question 3

aerobic respiration? (symbols)

Answer 3

C6H12O6+ 6O2 TO 6CO2 + 6H2O

Question 4

aerobic respiration? (word)

Answer 4

glucose + oxygen to carbon dioxide + water + energy released

Question 5

anaerobic in yeast? (symbol)

Answer 5

C6H12O6 - 2CO2 + 2C2H5OH

Question 6

anaerobic in yeast? (word)

Answer 6

glucose to carbon dioxide + ethanol + energy released

Question 7

What is the importance of 50% lost as heat?

Answer 7

Keeps us at body temperature, enzymes optimum temperature e.g. humans 37 degrees

Question 8

Name the 3 ways the energy is used by the cell?

Answer 8

Joins small molecules together. Movement= muscle contraction to move bones. Active transport- movement of a substance from an area of low to high concentration

Question 9

Where does respiration take place in plant and animal cells?

Answer 9

Mitochondria

Question 10

Respiration is 1 out of the 7 characteristics of a living organism

Answer 10

(repeat)

Question 11

Respiration is the chemical release of energy within cells

Answer 11

(repeat)

Question 12

When muscle fibres contract they need…..

Answer 12

energy

Question 13

Where do muscles gain energy from?

Answer 13

Breaking down glucose

Question 14

Where does the glucose come from?

Answer 14

The blood and from a store of glycogen inside the muscle.

Question 15

Which gives more energy: aerobic or anaerobic respiration and why?

Answer 15

Aerobic gives more energy than anaerobic because the glucose molecule is completely broken down, unlike in anaerobic.

Question 16

What is glucose broken down into?

Answer 16

Partly broken down into Lactic Acid- small amount of energy half lost as heat.

Question 17

What do the muscle fibres need when active?

Answer 17

Extra supplies of oxygen.

Question 18

Where is the oxygen for the muscles supplied from?

Answer 18

The heart and lungs

Question 19

When muscles contract a lot, the heart is unable to supply enough oxygen for which type of respiration?

Answer 19

Aerobic- they THEN use anaerobic.

Question 20

What is muscle fatigue?

Answer 20

When the muscle becomes tired and heavy after too much lactic acid build up.

Question 21

Where does lactic acid go after exercise stops?

Answer 21

It is slowly removed from the muscle and enters the blood. It is broken down to obtain remaining energy which requires more oxygen.

Question 22

How is extra oxygen gaining when energy is being gained from lactic acid?

Answer 22

This is gained by increased breathing.

Question 23

What is oxygen debt?

Answer 23

A high breathing rate needed to obtain the oxygen for the break down of the lactic acid to be used as energy.

Question 24

How do long distance athletes gain energy?

Answer 24

From aerobic respiration. They travel at a steady pace which supplies enough oxygen for this.

Question 25

What does long distance athletes training do?

Answer 25

It increases the size of their heart and therefore their blood and oxygen supplies.

Question 26

How do sprinters respire?

Answer 26

Anaerobic respiration

Question 27

How do sprinters train?

Answer 27

With short sprints so muscles learn to cope with high concentration of lactic acid. This also increases the mass of their muscles.

Question 28

What is respiration?

Answer 28

the transport of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction.