Which of the Following Is Not a Method Used to Observe

question 72

Multiple Choice

Which of the following is not a method used to observe operations in the immune system?

• A) Lymphocyte count in a blood draw
• B) Extract blood, add cancerous tumor cells, and measure effectiveness of natural killer cells
• C) Inject a foreign agent in the skin and measure the amount of swelling
• D) Swab the inside of a cheek and measure the level of cortisol

---

Definitions:

Altruism

The behavior and attitude of selflessly caring for the well-being of others, often at a personal cost.

Windfall Bonus

An unexpected gain or profit, often a large sum of money received unexpectedly.

Bystander Effect

The social psychological phenomenon where individuals are less likely to offer help to a victim when other people are present.

Emergency

An emergency is a sudden, unexpected situation requiring immediate action due to potential threat, harm, or danger to life, property, or the environment.