Multiple Choice
Which of the following is not a method used to observe operations in the immune system?
A) Determine the 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.
Correct Answer:
Verified
Correct Answer:
Verified
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