Which of the following is not a function of the skeletal system? (a) Storing minerals and fats, (b) Producing red blood cells, (c) Responding to external stimuli, (d) Protecting internal tissues and organs.

Step 1: Define the Problem

Identify which option is not a function of the skeletal system.

Step 2: Break Down the Problem

• List the functions of the skeletal system.
• Compare each option to the known functions.

Step 3: Apply Relevant Concepts

The skeletal system has several key functions:

• Storing minerals and fats: Bones store minerals such as calcium and phosphorus, and yellow bone marrow stores fats.
• Producing red blood cells: Red bone marrow is responsible for the production of red blood cells.
• Protecting internal tissues and organs: The skeletal system provides protection for vital organs, such as the brain, heart, and lungs.

Step 4: Analysis, Verify and Summarize

• Responding to external stimuli: This is primarily a function of the nervous system, not the skeletal system.

Final Answer

The option that is not a function of the skeletal system is (c) Responding to external stimuli.