14.3 Movement and Locomotion part 1

When you bend the arms, the muscles........

• biceps contract, triceps relax

• biceps relax, triceps contract

• biceps contract, triceps contract

• biceps relax, triceps relax

Flexors(muscles that bends the limbs when it contracts) and extensors(muscles that straightens the limb when it contracts) are muscles ____________.

• Protagonist

• Antagonist

• Human

• Heart

........ contract to bend the leg at the knee joint. The right leg is raised.

• Quadriceps femoris muscle

• Biceps femoris muscle

To straighten the legs, the muscles ........ will contract

• quadriceps femoris

• biceps femoris

• tibialis

What will happen to the movement of the fish if the tail is injured?

• the fish must not float

• the fish cannot overcome the resistance

• the fish cannot move up and down

• the fish cannot produce a forward thrust

When the pectoralis major muscle contracts and the pectoralis minor muscle relaxes, the wings are moved to ____________.

Eartworms have muscles...........

• circular and circular

• longitudinal and circular

• longitudinal and longitudinal

• senses and motor

Diagram above shows the locomotion of an earthworm. Which of the followingis correct about the action of muscles in segment T?

• Longitudinal muscle contract , circular muscle relax

• Longitudinal muscle relax , circular muscle relax

• Longitudinal muscle relax , circular muscle contract

• Longitudinal muscle contract , circular muscle contract