Exercise Physiology: Theory and Application to Fitness and Performance 9th Edition by Scott Powers, Edward Howley

Exercise 2

Define the key components that make up the innate immune system (e.g., macrophages, neutrophils, natural killer cells, and complement system), and describe how these elements protect against infection.

Step 1 of 4

Innate immunity: This arm of immunity is possessed by a person by virtue of his/her birth, and does not change throughout the life. The immunity is also called non-specific immunity. It has several mechanisms that operate individually and in concert to contain the pathogens, as listed below:

• Physical barriers

• Phagocytes

• Complement system