Understanding the Sliding Filament Theory

What does the sliding filament theory primarily explain?

• How muscles generate heat

• How muscles contract by shortening fibers

• How muscles grow in size

• How muscles store energy

What are the two main protein filaments involved in the sarcomere structure?

• Tubulin and dynein

• Keratin and fibrin

• Myosin and actin

• Collagen and elastin

What is the basic unit of a myofibril?

• Sarcomere

• Neuron

• Mitochondrion

• Nucleus

What triggers the attachment of myosin and actin filaments during muscle contraction?

• Release of ATP

• Release of calcium ions

• Increase in temperature

• Decrease in pH

What is necessary for muscle contraction to occur?

• Oxygen

• Lactic acid

• Glucose

• ATP