Question 1: What is the primary function of white blood cells in the human body?

Answer: To fight infections

Question 2: Which of the following is a bacterial infection?

Answer: Strep throat

Question 3: True or False: Viruses can reproduce on their own without a host cell.

Answer: False

Question 4: True or False: Antibiotics are effective against viruses.

Answer: False

Question 5: Describe how vaccinations help protect against diseases.

Answer: Vaccinations stimulate the immune system to recognize and fight pathogens.

Question 6: Explain why handwashing is important in preventing the spread of infections.

Answer: Handwashing removes germs and prevents their spread to others.

Question 7: What are antibodies and what role do they play in the immune system?

Answer: Antibodies are proteins that recognize and neutralize pathogens.

Question 8: Calculate the time it takes for a bacterial population to double if it grows at a rate of 20% per hour. Use the formula: Doubling Time = 70 / Percentage Growth Rate

Answer: 3.5 hours

Question 9: Match the following terms to their definitions:

Answer: See full answer key

Question 10: Order the steps of the body's response to a viral infection:

Answer: See full answer key

Question 11: Fill in the blank: The ___ system is the body's defense against infectious organisms and other invaders.

Answer: immune

Question 12: Discuss the importance of herd immunity and how it helps protect vulnerable populations.

Answer: Herd immunity occurs when a large portion of a community becomes immune to a disease, making the spread of disease from person to person unlikely. It helps protect those who cannot be vaccinated, such as newborns or those with weakened immune systems.