F4BIOC14.3 support and locomotion in animals

Diagram  shows a human arm.

If X was torn off, what happens to the arm?

• The fingers cannot grip

• The elbow joint loosens

• The arm cannot be bent

• he lower arm cannot twis

What are the actions of muscles P and Q in a down stroke movement of the wings?

• P relax Q relax

• P relax Q contract

• P contract Q relax

• P contract Q contract

why do aquatic vertebrates have a smaller endoskeleton compared to land vertebrates of the same body mass?

• they have exoskeleton to support their body weight

• they are mostly supported by water bouyancy

• their fatty tissues support their weight

• they move very slowly and are inactive

Which of the following statement is TRUE about the pigeons that have hollow bones?

• they can stand straight

• weight decrease

• their bones are easily broken

• their body support system is more compact

Diagram 1 shows an elbow joint. Which of the following parts labelled A, B, C or D is tough and elastic?

• A

• C

• B

• D

Which of the following is true about synovial fluid?

• Is a big protein molecule

• Hold the muscle to the bone

• Will help to soften the joint

• Act as lubrication at the joint

In human arm, we have seen how the biceps contracts to bend the elbow, while triceps relaxes. This action is called ___________.

• prime mover

• antagonist

• antagonistic

• agonist

Which pair of bones form the ball and socket joint?

• Ulna and radius

• Humerus and radius

• Humerus and ulna

• Humerus and scapula

What type of joint is this

• gliding

• pivot

• hinge

• ball and socket

Diagram below shows a bending leg. Which of the following muscle actions will straighten the leg?

• Quadriceps femoris- Contarcts

  Biceps femoris- Contracts

• Quadriceps femoris- Contarcts

  Biceps femoris- Relaxes

• Quadriceps femoris- Relaxes

  Biceps femoris- Relaxes

• Quadriceps femoris- Relaxes

  Biceps femoris- Contracts