Anatomy & Physiology Musculoskeletal #9

Question

Which substance found in the human bones specifically adds strength to the skeletal system?

Answers

  1. Minerals
    • Rationale:

      Some minerals, such as calcium, may add strength to the skeletal system; however, this is not the substance found in human bones that specifically adds strength to the skeletal system.

  2. Collagen
    • Rationale:

      A large body of evidence indicates that type I collagen molecules within the bones of the skeletal system are involved in mechanical properties of bone; specifically, collagen plays a role in bone strength due to its capacity to absorb energy.

  3. Glycoproteins
    • Rationale:

      Bone matrix glycoproteins and proteoglycans are proportionally the most abundant constituents of the non collagenous proteins located within the bone matrix. Both exhibit a broad array of functions including the control of bone cell proliferation.

  4. Proteoglycans
    • Rationale:

      Bone matrix proteoglycans and glycoproteins are proportionally the most abundant constituents of the non-collagenous proteins located within the bone matrix. Both exhibit a broad array of functions including the control of bone cell proliferation.

Overview

Many substances are found within human bones, and their cells, which are essential to ongoing bone health.

Explanation

Learning Outcomes

Substances that are found within human bones include the following: collagen, glycoproteins, minerals, proteins, and proteoglycan. Each has a specific function for bone health. Collagen is responsible for adding strength to the skeletal system.

Test Taking Tip

Consider the function of each bone substance to correctly answer this question.

Video Rationale