Which of the following are part of the body’s first line of defense against pathogens?

A.
white blood cells

B.
red blood cells

C.
lymph nodes

D.
mucous membranes

Question

Which of the following are part of the body’s first line of defense against pathogens?
 
 A.
white blood cells
 
 B.
red blood cells
 
 C.
lymph nodes
 
 D.
mucous membranes

neonumbrella5115 · Answer

What do you think?

alones · Answer

The interferons, which are produced by cells that have been infected with a virus and carry a signal to adjacent cells, thereby protecting them from the infecting virus.
The nonspecific defenses include: the skin, which is somewhat remove foreign invaders impermeable and acts as a physical barrier the mucous membranes, which act to trap and cilia, which line the respiratory tract and sweep away foreign materials that are inhaled the acid in the stomach, which destroys microorganisms that are ingested the circulatory white blood cells, which engulf and destroy foreign invaders that enter into the blood