Multiple Choice
Examples of 1st line defenses to infection which are components of the innate immune system include all of the following except?
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21. The Immune System
Physical Barriers in First-Line Defenses: Skin
Multiple Choice
Which of the following terms refers to the first line of defense in the skin's barrier?
A
Subcutaneous tissue
B
Hypodermis
C
Epidermis
D
Dermis
Verified step by step guidance1
Begin by understanding the structure of the skin, which consists of three main layers: the epidermis, dermis, and hypodermis (also known as subcutaneous tissue).
The epidermis is the outermost layer of the skin and serves as the primary barrier against environmental factors, including pathogens and physical damage.
The dermis lies beneath the epidermis and provides structural support, housing blood vessels, nerves, and glands.
The hypodermis, or subcutaneous tissue, is the deepest layer, primarily composed of fat and connective tissue, providing insulation and cushioning.
Recognize that the epidermis, being the outermost layer, is the first line of defense in the skin's barrier, protecting the body from external threats.
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