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Skeletal and Muscular Systems — Free MYP3 Sciences Practice Questions
1QuestionFunctions of the Human SkeletonConcept Practice
2 marks~3 minCriterion A
The diagram below shows the human skeleton with one bone labelled X.
a
Identify the bone labelled X. [1]
b
Explain why the shape and hardness of bone X makes it well suited to its primary function. [1]
Solutions
2QuestionFunctions of the Human SkeletonAssessment Practice
4 marks~6 minCriterion C
During a fall, a person lands hard on their chest. The diagram shows the rib cage surrounding the heart and lungs at the moment of impact.
a
Identify two organs protected by the rib cage. [1]
b
Explain how the structure of the rib cage protects these organs when the chest hits the ground. [2]
c
A classmate claims that flat bones would protect the heart and lungs just as well as curved ribs. Using your knowledge of the skeletal system, explain whether you agree with this claim. [1]
Solutions
3QuestionTypes of Joints and Their MovementConcept Practice
2 marks~3 minCriterion B
A student investigates how the angle of the elbow joint affects the distance a ball is thrown. The same person throws the same ball at elbow angles of , , and , measuring the throwing distance each time.
a
Identify the independent variable and the dependent variable in this investigation. [1]
b
State one controlled variable and explain why keeping it constant makes the investigation a fair test. [1]
Solutions
4QuestionFunctions of the Human SkeletonAssessment Practice
6 marks~9 minCriterion D
Osteoporosis is a condition in which bone density decreases, making bones more fragile. Two elderly individuals, each with a mass of 70 kg, fall and experience a deceleration of upon impact.
Individual A (healthy): bone density
Individual B (osteoporosis): bone density
Individual A (healthy): bone density
Individual B (osteoporosis): bone density
a
Identify one function of the human skeleton related to protecting internal organs. [1]
b
Calculate the impact force experienced by each individual, using . [2]
c
The two individuals experience the same impact force, yet Individual B is at much greater risk of a hip fracture. Analyse two reasons why impact force alone is insufficient to predict fracture risk. [3]
Solutions
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