Question

1. practice: understanding the immune system

respond to the following based on your reading.
question 1
describe the steps that occur, in order, to trigger an inflammatory response to a paper cut.

check my answer

question 2
colonization is largely blamed for bringing smallpox to the americas. why was this disease so devastating to indigenous americans? why can people now travel to different parts of the world and avoid contracting analogous diseases?

Explanation:

Question 1:

When there is a paper - cut, damaged cells release chemical signals like histamine. Histamine causes blood vessels near the cut to dilate, increasing blood flow to the area. This allows immune cells such as white blood cells to move from the bloodstream into the damaged tissue. The white blood cells then start to fight off any potential pathogens and begin the repair process.

Question 2:

Smallpox was devastating to Indigenous Americans because they had no prior exposure to the virus, so their immune systems had no pre - existing immunity or memory cells to fight it. Today, people can travel and avoid analogous diseases due to vaccination, which primes the immune system to recognize and fight specific pathogens, and improved public health measures like disease surveillance and quarantine.

Answer:

Question 1:

Damaged cells release histamine. Blood vessels dilate. Immune cells move to the damaged tissue to fight pathogens and start repair.

Question 2:

Indigenous Americans had no prior immunity to smallpox. Today, vaccination and public - health measures help avoid analogous diseases.