Articles > Quizzes & Surveys > Biological Cell Defense Biological Cell Defense Quiz Choose the best answer. 1. Provides mechanical barrier from the environment Lysozyme Skin Cilia Macrophage 2. Can catch foreign agents in the nose Flagella Cilia Cell wall Cell membrane 3. Enzyme in tears and saliva that break down foreign agents Blood clot Interferon Lysozyme Mucus 4. Forms a plug on open wounds Blood clot Cell wall Cell membrane Mucus 5. Can attach to the membrane receptors of the neighboring cells Blood clot Lysozyme Interferon Fibrous protein Send Your Results (Optional) Your Name To Email Time is Up!