Select the Correct Past Participle for Each Blank

question 13

Multiple Choice

Select the correct past participle for each blank. For many decades, tungsten filaments have been ____ by makers of contemporary light bulbs, with life spans of 750 to 4,000 hours.

• A) use
• B) used

---

Definitions:

Inflammatory Response

The body's defense mechanism against harmful stimuli such as pathogens, damaged cells, or irritants, resulting in redness, heat, swelling, and pain.

Sebum

An oily substance produced by the sebaceous glands that helps to keep the skin and hair moisturized.

Integumentary System

Organ system of humans that contains the skin, protects the body, synthesizes sensory input, assists in temperature regulation, and synthesizes vitamin D.

Acidic

Having a pH less than 7, characterized by the ability to donate protons or hydrogen ions.