1.8

Question 1

lactate matabolism

Answer 1

pyruvate is converted into lactate.

this conversion involves the transfer of hydrogen to pyruvate in order to produce lactate.

this regenerates the NAD needed to maintain the ATP production through glycolosis

Question 2

Skeletal muscle brings about the movement of the body. There are two classifications of muscle fibres:

Answer 2

1. Slow Twitch
2. Fast Twitch

Question 3

slow twitch

Answer 3

Contract relatively slowly but

can sustain contractions for

longer.

good for endurance Marathon running.

Aerobic respiration provides

ATP

Many mitochondria

Large blood supply

Storage fuel is fat

Large quantity of myoglobin ( carries and stores oxygen )

Question 4

how does lactate metabolism occur

Answer 4

when muscle cells do not receive sufficent oxygen to support aerobic respiration

Question 5

lactate to pyruvate

Answer 5

lactate accumlates in the muscles causing an oxygen debt and muscle fatigue
the oxygen dept is repaid when the exercise is complete allowing respiration to provide the energy to covert lactate back into pyruvate into glucose in the liver