Energy Use and Fatigue

How many ATp molecules are used each time a myosin filament engages with an actin filament?

1 ATP molecule (until of energy) is used

What does a contraction of a muscle require?

plenty of ATP molecules

True or false: Muscles are either contracted or relaxed there is no-in-between?

true

What is the “gentleness” or “strength’ of a muscle determined by?

it is determined by the number of fibers engaged

what does the process of cellular respiration depend on?

the presence of oxygen

what happens if muscles don't get enought ATP?

they can become fatigued

How do muscles become fatigued?

• Intense exercise

• Muscle fatigue

• Anaerobic respiration

• Oxygen depth

What are the two types of cellular respiration?

aerobic and anaerobic