Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 21 - The Immune System: Innate and Adaptive Body Defenses - Review Questions: 1

Answer

C

Work Step by Step

Innate immunity provides the first line of defense against pathogens. It has nonspecific defense mechanisms that include soluble proteins such as complement and physical barriers such as skin and mucous membrane. It also includes cells like macrophages (involved in phagocytosis) and natural killer cells (promote apoptosis) and inflammatory response. Lysozyme is also included in innate immunity. It is present in lacrimal secretions of eye and is bactericidal. Antibodies are a part of the adaptive immunity. They are specific in their actions towards a particular pathogen.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.