Multiple Choice
The first line of defense to protect the body against foreign invaders is
A) physical barriers.
B) cellular components.
C) white blood cells.
D) natural killer cells.
Correct Answer:

Verified
Correct Answer:
Verified
Q8: The acquired immune system is often referred
Q9: A healthy immune system requires the teamwork
Q10: Physical barriers provide the second line of
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Q12: Which of the following immune cells are
Q14: In the adaptive immune system,the primary role
Q15: Which of the following immune cells are
Q16: The component of the immune system that
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