P5 Science · Chapter 9brightbit.net/worksheets
Musculoskeletal System
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
What are the three main functions of the skeletal system?
(a) Support, movement, and digestion(b) Support, protection, and movement(c) Protection, respiration, and movement(d) Support, circulation, and protection
- 2.
What is the function of cartilage?
(a) Produces blood cells(b) Smooth, flexible tissue that cushions joints and reduces friction(c) Connects muscle to bone(d) Connects bone to bone
- 3.
What is a ligament?
(a) Connects muscle to bone(b) Connects bone to bone at a joint(c) A type of bone marrow(d) Produces blood cells
- 4.
- 5.
Muscles can only pull, not push. How do muscles move bones in opposite directions?
(a) One muscle pushes while another pulls(b) Muscles work in antagonistic pairs — when one contracts, the other relaxes(c) Bones push back against muscles(d) Tendons push the bones back
- 6.
What is the difference between voluntary and involuntary muscles? Give an example of each.
- 7.
Why is calcium important for bones?
(a) It makes bones flexible(b) It gives bones their hardness and strength(c) It allows bones to grow(d) It produces blood cells in bones
- 8.
What type of joint allows the greatest range of movement?
(a) Hinge joint(b) Fixed joint(c) Ball-and-socket joint(d) Pivot joint
- 9.
Why do athletes who stop exercising gradually lose muscle mass?
- 10.
A doctor examines an X-ray and notes that a patient's bone has broken. What substance in bone makes it hard enough to break rather than bend?
(a) Collagen(b) Calcium phosphate(c) Cartilage(d) Bone marrow
Answer key — P5 Science: Musculoskeletal System
For parents. Step-by-step explanations for every question are free on brightbit.net.
- 1.(b) Support, protection, and movement
- 2.(b) Smooth, flexible tissue that cushions joints and reduces friction
- 3.(b) Connects bone to bone at a joint
- 4.A tendon is a tough connective tissue that connects muscle to bone, transmitting the force of muscle contraction to move bones
- 5.(b) Muscles work in antagonistic pairs — when one contracts, the other relaxes
- 6.Voluntary muscles are under conscious control (e.g. bicep); involuntary muscles work automatically without conscious thought (e.g. heart, diaphragm)
- 7.(b) It gives bones their hardness and strength
- 8.(c) Ball-and-socket joint
- 9.Without regular use and stimulation, muscle fibres become smaller and weaker (muscle atrophy)
- 10.(b) Calcium phosphate
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