KA8 Energy Systems In Muscle Cells

Question 1

Which type of fibre would be a greater benefit for a marathon runner

Answer 1

Slow twitch

Question 2

Which type of fibre would be greater benefit for a sprinter

Answer 2

Fast twitch

Question 3

What are the 2 types of skeletal muscle fibres

Answer 3

Slow twitch

Fast twitch

Question 4

What is myoglobin

What does it do?

Answer 4

A chemical that binds together with o2

It extracts o2 from the blood in high concentrations and stores it in muscle cells to use in aerobic respiration

Question 5

What is the pain called in the muscles

Answer 5

Muscle fatigue

Question 6

Why is lactate building up in the muscles a problem

Answer 6

Lactate lowers the Ph of muscle tissues, causing acidosis resulting in pain in the muscles

Question 7

Why is hydrogen added to pyruvate under low o2 conditions

Answer 7

NAD is required to continue predicting ATP in glycolysis so hydrogen is transferred from NADH coennzye to pyruvate forming lactate

Question 8

What does pyruvate convert into

Answer 8

Lactate

Question 9

What is the only stage of respiration that can occur without oxygen

Answer 9

Glycolysis