Answer
c. natural killer cells
Work Step by Step
Natural killer cells are involved in nonspecific resistance but not in adaptive immunity.
Helper T cells, cytotoxic T cells, B cells, and plasma cells are all part of the adaptive immune system.
Anatomy & Physiology: The Unity of Form and Function, 7th Edition
by Saladin, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0073403717
ISBN 13:
978-0-07340-371-7
Chapter 21 - The Lymphatic and Immune Systems - Study Guide - Testing Your Recall - Page 845: 2
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