ATP and Muscle contraction

Question 1

What is the fastest way to provide ATP?

Answer 1

adding PCr + ADP –> ATP + Cr

Question 2

PCr

list 5 key points

Answer 2

• stored by cells
• short + simple reaction
• best for high intensity short duration
• anaerobic
• a-lactic

Question 3

Anaerobic respiration

Answer 3

• 2 ATP are made by glycolysis (pyruvate –> lactate)
• causes muscle fatigue
• used for short duration, high intensity work

Question 4

Aerobic respiration

Answer 4

• produces most ATP mainly via oxidative phosphorylation
• very slow, many reactions
• no harmful waste products

Question 5

slow twitch

Answer 5

• contract and relax slowly
• low force of contraction so resistant to fatigue
• respire aerobically
• lots of mito, blood vessels, myoglobin
• little anaerobic resp

Question 6

fast twitch

Answer 6

• contract and relax fast
• high force of contraction so fatigue quickly
• respire anaerobically
• so have few mito, blood vessels and myoglobin
• little aerobic resp