Bones, Muscles & Structure-Function Models — Drills · Grade 7 Science
Chapter: Body Organization, Transport & MovementWhat these drills covers
By the end of Bones, Muscles & Structure-Function Models you should be able to:
- I can explain bones, muscles & structure-function models.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: skeletal muscle, tendon, joint, contraction, lever.
Problem 1
What does a tendon connect in this model?
- Muscle and bone
- Only two air spaces
- A scale bar and nucleus
- Food and soil
Answer and explanation
Muscle and bone
Tendons transmit muscle forces to bones in the studied arrangement.
Problem 2
Name one omitted process in a paper joint model and why it matters.
Answer and explanation
Nervous coordination is omitted; actual movement depends on signals controlling muscle actions. Cellular energy processes and living tissue properties are other valid examples.
Problem 3
Why is listing bones alone not a structure-function explanation?
Answer and explanation
It identifies parts but does not explain how their arrangement contributes to support, protection, or movement.
Problem 4
Can a paper lever determine someone’s safe lifting limit?
Answer and explanation
No. It omits biological and individual factors and is only a selected relationship model.