Difficulty: Medium
Average Score: 84%
Entry Exam
Which of the following chemicals is released by one type of immune cell to directly activate another type of immune cell?
Correct answer
A
Rationale
The correct answer is A: Cytokines. Cytokines are signaling molecules released by immune cells to directly activate and regulate the activity of other immune cells. They play a crucial role in coordinating the immune response. Granzymes, lysozymes, and perforin have different functions in the immune system. Granzymes are enzymes that induce apoptosis in target cells, lysozymes have antimicrobial properties, and perforin is involved in the destruction of infected cells.