Textbook Question
Which of the following is not an epidermal derivative?
a. Hair
b. Sweat gland
c. Sensory receptor
d. Sebaceous gland.
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5. Integumentary System
Introduction to the Integumentary System
2:10 minutesProblem 11
Textbook Question
From what types of damage does the skin protect the body?
Verified step by step guidance1
The skin protects the body from mechanical damage, such as cuts, abrasions, and impacts, by acting as a physical barrier. The outermost layer, the epidermis, is composed of keratinized cells that provide toughness and resilience.
The skin shields the body from chemical damage by preventing harmful substances, such as acids or toxins, from penetrating deeper tissues. The lipid barrier in the epidermis helps repel water-soluble chemicals.
The skin defends against microbial damage by serving as the first line of defense against pathogens. It produces antimicrobial peptides and houses immune cells that help combat infections.
The skin protects the body from ultraviolet (UV) radiation damage by producing melanin, a pigment that absorbs and dissipates harmful UV rays, reducing the risk of DNA damage in skin cells.
The skin helps prevent dehydration and thermal damage by regulating water loss through its barrier function and maintaining body temperature through sweat production and blood vessel dilation or constriction.
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2mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Barrier Function
The skin serves as a primary barrier that protects the body from external threats, including pathogens, chemicals, and physical abrasions. This barrier function is crucial for maintaining homeostasis and preventing infections, as it limits the entry of harmful microorganisms and substances.
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Chemical Barriers
Thermoregulation
The skin plays a vital role in thermoregulation, helping to maintain the body's internal temperature. It does this through mechanisms such as sweating and blood flow regulation, which protect the body from overheating and cold exposure, thereby preventing heat-related illnesses and hypothermia.
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Sensory Reception
The skin is equipped with a variety of sensory receptors that detect changes in the environment, such as temperature, pressure, and pain. This sensory function is essential for protecting the body by alerting it to potential dangers, allowing for quick reflexive responses to harmful stimuli.
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