Essentials of Biology
Essentials of Biology
4th Edition
ISBN: 9780078024221
Author: Sylvia S. Mader Dr., Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 26.2, Problem 3CYP
Summary Introduction

To explain:

The reason why complement system and natural killer cells are nonspecific.

Introduction:

The body mechanisms that protect against the infections are innate defense and adaptive defense. Adaptive defense is the precise mechanism or specific mechanism, but innate mechanism is a non specific mechanism, which develops quickly. It provides general response regardless of pathogen type and exposure numbers. Innate mechanism includes physical barrier (first line of defense), natural killer cell, chemical barriers, complement system, inflammation and phagocytosis.

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