Unit 1.8 Energy systems in Muscle Cells

Question 1

What happens when muscle cells do not get enough oxygen to support the electron transport chain

Answer 1

pyruvate is converted to lactate

Question 2

What does the conversion of pyruvate to lactate involve

Answer 2

The transfer of hydrogen ions from the NADH (produced during glycolysis) to pyruvate in order to produce lactate

Question 3

Where does lactate metabolism occur

Answer 3

The cytoplasm

Question 4

Speed of slow twitch contraction

Answer 4

Slow

Question 5

Length of time slow twitch contraction is sustained

Answer 5

Long periods

Question 6

Speed slow twitch muscle fibres become fatigued

Answer 6

Slowly

Question 7

Which respiratory pathway produces ATP in slow twitch muscle fibres

Answer 7

Aerobic respiration

Question 8

How many mitochondria present in slow twitch muscle fibres

Answer 8

Many

Question 9

Slow twitch muscle fibre blood supply to muscle

Answer 9

Large blood supply

Question 10

Concentration of myoglobin in slow twitch muscle fibres

Answer 10

High

Question 11

Major storage fuel used in slow twitch muscle fibres

Answer 11

Fats

Question 12

Speed of fast twitch contraction

Answer 12

Fast

Question 13

Length of time fast twitch contraction is sustained

Answer 13

Short periods

Question 14

Speed that fast twitch muscle fibres become fatigued

Answer 14

Fast

Question 15

Respiratory pathway used to produce ATP in fast twitch muscle fibres

Answer 15

Glycolysis

Question 16

How much mitochondria present in fast twitch muscle fibres

Answer 16

Few

Question 17

Fast twitch muscle fibres blood supply to muscle

Answer 17

Small blood supply

Question 18

Concentration of myoglobin in fast twitch muscle fibres

Answer 18

Low

Question 19

Major storage fuel used in fast twitch muscle fibres

Answer 19

Glycogen