Textbook Question
The epidermis provides a physical barrier due largely to the presence of
a. Melanin
b. Carotene
c. Collagen
d. Keratin
124
views
5. Integumentary System
The Epidermis: Cells
2:10 minutesProblem 15
Textbook Question
Name three changes that occur in the skin as one ages.
Verified step by step guidance1
Understand that aging affects the skin due to intrinsic factors (natural aging) and extrinsic factors (environmental exposure, such as UV radiation). These changes impact the structure and function of the skin.
Identify the first change: The epidermis (outer layer of the skin) becomes thinner over time, leading to a decrease in the skin's ability to protect against external damage and slower wound healing.
Recognize the second change: Collagen and elastin fibers in the dermis (middle layer of the skin) degrade, resulting in reduced elasticity and the formation of wrinkles.
Note the third change: Sebaceous glands produce less oil, leading to dryness and a decrease in the skin's ability to retain moisture.
Consider additional factors such as reduced melanocyte activity, which can cause uneven pigmentation or age spots, and discuss how these changes collectively impact the skin's appearance and function.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
2mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Decreased Collagen Production
As individuals age, the skin's ability to produce collagen diminishes significantly. Collagen is a vital protein that provides structure and elasticity to the skin. This reduction leads to sagging, wrinkles, and a loss of firmness, making the skin appear older and less resilient.
Recommended video:
07:25
Total Products for Each Stage of Aerobic Cellular Respiration
Thinning of the Epidermis
The epidermis, the outermost layer of the skin, becomes thinner with age. This thinning can result in increased fragility and susceptibility to injuries, as well as a decrease in the skin's ability to retain moisture. Consequently, older skin may appear more translucent and less vibrant.
Recommended video:
02:29Thin vs. Thick Skin
Decreased Sebum Production
Sebum is an oily substance produced by sebaceous glands that helps to keep the skin moisturized and protected. As people age, the production of sebum decreases, leading to drier skin. This lack of moisture can contribute to the appearance of fine lines and a rough texture, further emphasizing the signs of aging.
Recommended video:
1:56Sebum
Related Videos
Related Practice