14.3 Movement and Locomotion of Grasshopper

Which of the following is true about the condition of grasshoppers at stage 1?

• the flexor muscles of the hind legs contract

• the extensor muscles of the hind legs contract

• Energy is stored in joints in muscles

• the extensor muscles bend the legs

At stage 2 of the movement of a grasshopper. Which are the correct actions of the flexor muscle and extensor muscle to allow the movement?

• Flexor muscle contract ,extensor muscle contract

• Flexor muscle relax ,extensor muscle relax

• Flexor muscle relax ,extensor muscle contract

• Flexor muscle contract ,extensor muscle relax