Locomotion and Movement: common misconceptions

If your child says… “Every movement is locomotion.”

Ask together

When you marched on the spot, did your place change?

What’s true

Moving a part does not necessarily move the whole organism elsewhere.

If your child says… “A sarcomere runs from one middle line to the next.”

Ask together

Which lines anchor the thin filaments at the unit's ends?

What’s true

Z lines bound the sarcomere; its M line lies centrally.

If your child says… “Tropomyosin does everything; troponin has no job.”

Ask together

Which protein binds calcium before tropomyosin shifts?

What’s true

Troponin responds to calcium and helps control whether myosin can attach.

If your child says… “The dark A band gets shorter.”

Ask together

Which bracket spans the same length of myosin in both diagrams?

What’s true

The A band spans the thick filaments, whose length remains unchanged.

If your child says… “All 206 bones belong to the axial skeleton.”

Ask together

Is your wrist part of the central framework you just located?

What’s true

The adult axial skeleton contains 80 bones; limbs and girdles belong to another division.

If your child says… “The patella belongs at the elbow.”

Ask together

Which labelled bone lies at the front of the knee?

What’s true

The patella sits within the thigh muscle's tendon at the front of the knee.

If your child says… “The hip works like a hinge.”

Ask together

Would a hinge allow the turning movement available at your shoulder?

What’s true

The rounded thigh-bone head fits the hip socket, allowing movement in several directions.

If your child says… “Osteoporosis makes bones heavier and harder to break.”

Ask together

Does the patch with wider gaps contain more bone or less?

What’s true

Osteoporosis reduces bone mass and increases the likelihood of fractures.