Your class is using engineering principles to improve the design of football helmets to prevent brain injury. Your teacher divides you into groups and gives you various supplies (such as tape, bubble wrap, and foam) to create, design, and build a new helmet. Which of these is a benefit of this type of project in STEM education? - Students become confident in working independently.
- Students participate and apply engineering principles.
- Students use household items to create new products.
- Students learn to follow steps provided by their teacher.

The correct answer is "sodium chloride".

Explanation:

Even though the excess of sodium chloride (common table salt) have the detrimental effect of causing high blood pressure, sodium chloride in the correct amounts are highly beneficial for the body. Sodium chloride allows for neuromuscular excitability, secretory activity, membrane permeability, & maintaining correct osmotic relationship between cells & ECF. The chloride anion that comes from salt is a major contributor to the osmotic pressure gradient between the ICF and ECF, which ultimately leads to cells and ECF communication.