Muscle Mechanics and Romance

Which famous lovers are compared to the proteins actin and myosin?

• Helen and Paris

• Romeo and Juliet

• Tristan and Isolde

• All of the above

What do muscle cells convert chemical potential energy into?

• Kinetic energy

• Mechanical energy

• Electrical energy

• Thermal energy

How many types of muscle tissue are mentioned?

• Five

• Two

• Three

• Four

What is the role of ATP in muscle contraction?

• It acts as a structural protein

• It provides energy

• It acts as a muscle relaxant

• It increases muscle mass

What are the two main rules related to proteins mentioned?

• They like to change shape and bind/unbind with other stuff

• They replicate and mutate

• They act as DNA and RNA

• They serve as enzymes and hormones

What is the sliding filament model of muscle contraction?

• A theory of muscle relaxation

• A theory of energy conservation in muscles

• A model of muscle growth

• A model of how muscles contract

What proteins act as bodyguards preventing actin and myosin from binding?

• Troponin and tropomyosin

• Sodium and potassium

• Calcium and phosphate

• ATP and ADP

What triggers the calcium channels on the sarcoplasmic reticulum to open?

• A chemical reaction

• An action potential

• A temperature change

• A physical force

What is the primary function of the sarcoplasmic reticulum in muscle cells?

• To synthesize proteins

• To store and release calcium

• To remove waste products

• To produce ATP

What happens when ATP binds to myosin during muscle contraction?

• Myosin splits into ADP and phosphate

• Myosin becomes inactive

• Myosin binds more tightly to actin

• Myosin detaches from actin