Skin Functions Trivia and Answers

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| By Lisag0223
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Lisag0223
Community Contributor
Quizzes Created: 2 | Total Attempts: 48,949
Questions: 13 | Viewed: 29,001

1.

The layer of the epidermis that contains melanocytes is the

Answer: Stratum basale
Explanation:
The stratum basale is the layer of the epidermis that contains melanocytes. Melanocytes are specialized cells that produce melanin, the pigment responsible for skin, hair, and eye color. These cells are found in the deepest layer of the epidermis, the stratum basale, where they transfer melanin to nearby skin cells to protect them from UV radiation. The other layers mentioned in the options, such as the stratum lucidum, stratum spinosum, stratum corneum, and stratum granulosum, do not contain melanocytes.
2.

Most body odor is the result of bacterial metabolism of the secretions produced by _____ glands.

Answer: Apocrine sweat
Explanation:
Most body odor is the result of bacterial metabolism of the secretions produced by apocrine sweat glands. Apocrine sweat glands are found in areas such as the armpits and groin, and they produce a thicker and more oily type of sweat compared to the eccrine sweat glands found throughout the rest of the body. This thicker sweat provides a suitable environment for bacteria to thrive, and when these bacteria break down the sweat, it produces the characteristic body odor.
3.

The fibrous protein that is responsible for the strength and water resistance of the skin surface is

Answer: Keratin
Explanation:
Keratin is the correct answer because it is a fibrous protein that provides strength and water resistance to the skin surface. Keratin is a major component of the outermost layer of the skin, known as the epidermis, and it forms a protective barrier against environmental factors. It also helps to maintain the integrity and structure of the skin, making it strong and resistant to damage.
4.

The layer of the skin that provides protection against bacteria, as well as chemical and mechanical injuries is the

Answer: Epidermis
Explanation:
The epidermis is the outermost layer of the skin and serves as a protective barrier against bacteria, chemicals, and mechanical injuries. It is composed of multiple layers of cells, including keratinocytes, which produce a tough protein called keratin that helps to strengthen and protect the skin. The epidermis also contains melanocytes, which produce melanin, the pigment responsible for skin color and protection against UV radiation. Overall, the epidermis plays a crucial role in maintaining the integrity and health of the skin.
5.

The macrophages found in the epidermis are the

Answer: Langerhans cells
Explanation:
Langerhans cells are a type of macrophage found in the epidermis. They play a crucial role in the immune response by capturing and presenting antigens to activate T cells. Unlike other macrophages, Langerhans cells have a dendritic shape and are involved in the initiation of immune responses against pathogens that penetrate the skin. This makes them distinct from squamous cells, Merkel cells, basal cells, and melanocytes, which have different functions and locations within the epidermis.
6.

_________ glands discharge an oily secretion into fair follicles.

Answer: Sebaceous
Explanation:
Sebaceous glands discharge an oily secretion into hair follicles. These glands are responsible for producing sebum, which helps to moisturize and protect the skin and hair. The sebum produced by sebaceous glands helps to keep the skin and hair lubricated, preventing dryness and providing a natural barrier against bacteria and other harmful substances.
7.

The _____ are the most abundant cells in the epidermis

Answer: Keratinocytes
Explanation:
Keratinocytes are the most abundant cells in the epidermis. These cells are responsible for producing keratin, a tough protein that provides structural support and protection to the skin. Keratinocytes also play a role in the immune response of the skin and are involved in the process of wound healing. Langerhans cells, melanocytes, adipocytes, and Merkel cells are all present in the epidermis, but they are not as abundant as keratinocytes.
8.

Contraction of the arrector pili muscles cause

Answer: "goose bumps"
Explanation:
When the arrector pili muscles contract, it causes the hair follicles to stand upright, resulting in the appearance of "goose bumps" on the skin. This response is triggered by various factors such as cold temperatures, fear, or emotional arousal. The contraction of these muscles does not directly affect sweat release, hair shedding, or skin color change.
9.

The _______ contains the cells that are undergoing mitosis.

Answer: Stratum basale
Explanation:
The stratum basale is the correct answer because it is the deepest layer of the epidermis where cell division occurs. This layer contains cells that are actively undergoing mitosis, which is the process of cell division. The other layers mentioned in the options, such as the stratum granulosum, stratum corneum, stratum spinosum, and stratum lucidum, do not contain cells that are actively undergoing mitosis.
10.

Protective functions of the skin include all of the following except protection

Answer: Of the joints
Explanation:
The skin has various protective functions, including protecting against infections, harmful chemicals, and water loss. However, it does not provide direct protection to the joints. The joints are primarily protected by other structures such as ligaments, tendons, and cartilage. While the skin does cover the joints, its main function is not specifically to protect them.
11.

Hair follicles and fingernails originate in the _____ but are actually derived from ______ tissue.

Answer: Dermis; spidermal
Explanation:
Hair follicles and fingernails originate in the dermis but are actually derived from epidermal tissue. The dermis is the layer of skin that lies beneath the epidermis, and it contains the hair follicles. The epidermis is the outermost layer of the skin and is responsible for the production of hair and nails. Therefore, the hair follicles and fingernails are derived from the epidermal tissue within the dermis.
12.

Most of the body heat is produced by

Answer: Contraction of skeletal muscles
Explanation:
The correct answer is contraction of skeletal muscles. Skeletal muscles are responsible for generating body heat through their contractions. When these muscles contract, they produce heat as a byproduct of the energy being used. This heat helps to regulate body temperature and keep it within a normal range. The hypothalamus plays a role in regulating body temperature, but it does not directly produce heat. Similarly, blood vessels and contraction of cardiac muscles do not generate as much heat as skeletal muscles.
13.

Usually a decrease in the amount of oxygen in the blood will result in ____ of the skin

Answer: Cyanosis
Explanation:
A decrease in the amount of oxygen in the blood can lead to cyanosis, which is a bluish discoloration of the skin. This occurs because when there is inadequate oxygen in the blood, the skin and mucous membranes do not receive enough oxygen, causing them to appear blue. Cyanosis is a sign of poor oxygenation and can indicate a serious medical condition. It is not related to jaundice, paleness, or flushing, which have different causes and symptoms.
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