Chapter 15 MCB Questions And Answers
Latest 2026 Update!!!
First line of defense Barriers and is nonspecific
Consists of multiple layers of tightly packed
Epidermis
epidermal dendritic cells
Epidermal dendritic cells Phagocytize pathogens
Dermis Contains collagen fibers
Give skin strength and pliability to resist
Collagen fibers
abrasions
Perspiration Secreted by sweat glands
Inhibits growth of pathogens by drawing water
Salt
from their cells
Antimicrobial peptides Sweat glands secret dermcidin
Lysozyme Destroys cell wall of bacteria
Secreted by sebaceous glands, helps keep skin
Sebum
pliable and less likely to break or tear, lowers pH
Lines all body cavities open to the outside
Mucous membranes
environment
Epithelium Thin, outer covering of the mucous membranes
Connective layer Supports the epithelium
Lacrimal apparatus Produces and drains tears
Help protect the body by competing with
Normal microbiota
potential pathogens
Saliva Washes microbes and contains lysozyme
Stomach acid and intestinal secretion Digest and inhibits microorganisms
, Bile Inhibitory to most microorganisms
Latest 2026 Update!!!
First line of defense Barriers and is nonspecific
Consists of multiple layers of tightly packed
Epidermis
epidermal dendritic cells
Epidermal dendritic cells Phagocytize pathogens
Dermis Contains collagen fibers
Give skin strength and pliability to resist
Collagen fibers
abrasions
Perspiration Secreted by sweat glands
Inhibits growth of pathogens by drawing water
Salt
from their cells
Antimicrobial peptides Sweat glands secret dermcidin
Lysozyme Destroys cell wall of bacteria
Secreted by sebaceous glands, helps keep skin
Sebum
pliable and less likely to break or tear, lowers pH
Lines all body cavities open to the outside
Mucous membranes
environment
Epithelium Thin, outer covering of the mucous membranes
Connective layer Supports the epithelium
Lacrimal apparatus Produces and drains tears
Help protect the body by competing with
Normal microbiota
potential pathogens
Saliva Washes microbes and contains lysozyme
Stomach acid and intestinal secretion Digest and inhibits microorganisms
, Bile Inhibitory to most microorganisms