Question

an example of a chemical barrier is:

skin

tears

immune system

sars

question 9
how do you reduce your chance of illness? (2 examples)

Explanation:

Identify chemical barrier

• Skin is a physical/mechanical barrier.
• Tears contain lysozyme, an enzyme that chemically breaks down bacterial cell walls, making them a chemical barrier.
• The immune system is a broad system containing cellular and humoral responses.
• SARS is a disease caused by a virus.

Identify methods to reduce illness risk

• Washing hands frequently with soap and water removes pathogens mechanically.
• Getting vaccinated stimulates active immunity against specific pathogens.

Answer:

Question 1

• skin
• tears (Correct answer)
• immune system
• SARS

Question 2

Two examples of how to reduce your chance of illness are:

1. Washing your hands frequently with soap and water for at least 20 seconds.
2. Staying up-to-date on recommended vaccinations to build immunity.