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Skeletal and Muscular Systems — Free MYP1 Sciences Practice Questions
1QuestionFunctions of the Human SkeletonConcept Practice
4 marks~6 minCriterion A
The diagram shows a human skeleton with three parts labelled: the skull, the ribcage, and the backbone.
a
Name the organ protected by the skull. [1]
b
Identify the organs protected by the ribcage. [1]
c
Describe how the backbone protects the organ inside it. [2]
Solutions
2QuestionFunctions of the Human SkeletonConcept Practice
5 marks~8 minCriterion A
The bar graph below shows how much calcium is stored in bones compared to other body parts, for three age groups.
Age group — Calcium in bones (percent) — Calcium in other body parts (percent)
Age group — Calcium in bones (percent) — Calcium in other body parts (percent)
| Child (5–10 years): 99 | 1 |
|---|---|
| Adult (25–40 years): 98 | 2 |
| Elderly (65–80 years): 95 | 5 |
a
Name one job that bones do, based on the data shown. [1]
b
Describe what happens to the amount of calcium stored in bones as people get older. Use figures from the data in your answer. [2]
c
A child's bones store 99 percent of the body's calcium. An elderly person's bones store only 95 percent. Describe one difference between a child's lifestyle and an elderly person's lifestyle that could explain this change. [2]
Solutions
3QuestionMajor Muscles in the Human BodyConcept Practice
3 marks~5 minCriterion C
The table below shows three everyday actions and the muscle group each one uses.
| Action | Muscle group |
|---|---|
| Kicking a ball | Quadriceps |
| Pulling a rope | Biceps |
| Raising your arm | Deltoid |
a
Name the muscle group linked to pulling actions. [1]
b
Describe what the deltoid muscle does, using the table to help you. [1]
c
A student says: 'Pushing a door open uses the same muscle as pulling a rope.' State whether you agree or disagree, and give one reason using what you know about pushing and pulling muscles. [1]
Solutions
4QuestionProtection Support and MovementConcept Practice
5 marks~8 minCriterion B
The table below shows three bones, their shapes, and their main jobs.
The pelvis is a large, flat, curved bone at the base of the spine.
| Bone — Skull | Shape — Flat | Main job — Protect the brain |
|---|---|---|
| Bone — Rib | Shape — Curved flat | Main job — Protect the heart and lungs |
| Bone — Femur | Shape — Long | Main job — Support the weight of the body |
The pelvis is a large, flat, curved bone at the base of the spine.
a
Name the shape of the pelvis. [1]
b
Describe the main job of the pelvis. Use the table to help you. [2]
c
The skull and the femur have different shapes. Describe how their main jobs are different. [2]
Solutions
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