[G3 NS] Muscles in our arms

When a muscle gets shorter, we say it ............

• Relaxes

• Contracts

• stays the same

When a muscle gets longer, we say it ..............

• Relaxes

• Contracts

• Stays the same

When a muscle contracts, it ............... on the bones it is joined to.

• Pulls

• Pushes

What helps the bones in your skeleton move?

• Heart

• Lungs

• Muscles

Look at the model of the arm.

What is part A?

• Biceps

• Upper arm

• Lower arm

• Triceps

Look at the model of the arm.

What is part B (the elastic)?

• Biceps

• Upper arm

• Lower arm

• Triceps

Look at the model of the arm.

What is part C?

• Biceps

• Upper arm

• Lower arm

• Triceps

Look at the model of the arm.

What is part D (the elastic)?

• Biceps

• Upper arm

• Lower arm

• Triceps

Look at the model of the arm.

To make part C move UP, which part must CONTRACT?

• Part A

• Part B

• Part C

• Part D

Look at the model of the arm.

To make part C move UP, which part must RELAX?

• Part A

• Part B

• Part C

• Part D