1.
Which of these professionals help people with skin diseases?
Correct Answer
C. Dermatologist
Explanation
A dermatologist is a medical professional who specializes in diagnosing and treating skin diseases. They are trained to identify and treat various skin conditions, including acne, eczema, psoriasis, and skin cancer. Dermatologists also perform procedures such as biopsies, mole removals, and cosmetic treatments. They play a crucial role in helping individuals maintain healthy skin and address any concerns related to their skin's health.
2.
What vitamin is produced in the skin?
Correct Answer
C. Vitamin D
Explanation
Vitamin D is produced in the skin when it is exposed to sunlight. The skin contains a substance called 7-dehydrocholesterol, which is converted into vitamin D when it is exposed to ultraviolet B (UVB) radiation from the sun. Vitamin D is important for maintaining healthy bones, as it helps the body absorb calcium and phosphorus from the diet. It also plays a role in immune function and may have other health benefits.
3.
Which of these is not a function of the skin?
Correct Answer
C. Skin pigmentation
Explanation
Skin pigmentation is not a function of the skin. The skin's main functions include insulation, temperature regulation, and immunity. Insulation is provided by the layer of fat beneath the skin, which helps to maintain body temperature. The skin also regulates body temperature through sweating and blood vessel dilation or constriction. Immunity is another important function of the skin, as it acts as a barrier against pathogens and helps to prevent infections. However, skin pigmentation refers to the color of the skin, which is determined by the amount and type of melanin present in the skin cells. It is not a function of the skin, but rather a characteristic influenced by genetic and environmental factors.
4.
How many are the basic layers of the skin?
Correct Answer
A. Two layers
Explanation
The skin consists of two basic layers: the epidermis and the dermis. The epidermis is the outermost layer and provides a protective barrier against the environment. It is composed of several sublayers, including the stratum corneum, stratum granulosum, stratum spinosum, and stratum basale. The dermis lies beneath the epidermis and is responsible for providing strength and support to the skin. It contains blood vessels, nerves, hair follicles, and sweat glands. These two layers work together to maintain the integrity and function of the skin.
5.
What is the outermost layer of the skin?
Correct Answer
A. Epidermis
Explanation
The outermost layer of the skin is called the epidermis. This layer acts as a protective barrier against external factors such as UV radiation, chemicals, and bacteria. It also helps regulate body temperature and prevents water loss. The epidermis is composed of several layers, including the stratum corneum, which is the outermost layer consisting of dead skin cells, and the stratum basale, which is the innermost layer where new skin cells are produced.
6.
What is the best care for oily skin?
Correct Answer
A. Regular washing
Explanation
Regular washing is the best care for oily skin because it helps to remove excess oil, dirt, and impurities from the skin's surface. This helps to prevent clogged pores and breakouts. However, it is important to use a gentle cleanser and not over-wash the skin, as this can strip away natural oils and cause the skin to produce even more oil. Additionally, using non-comedogenic moisturizers and avoiding heavy, oil-based products can also help to manage oily skin.
7.
What is the substance produced by sebaceous glands in the skin called?
Correct Answer
B. Sebum
Explanation
Sebum is the substance produced by sebaceous glands in the skin. It is an oily, waxy substance that helps to lubricate and waterproof the skin and hair. Sebum also plays a role in protecting the skin from bacteria and other microorganisms.
8.
Which of the foods is most beneficial to the skin?
Correct Answer
C. Fruits
Explanation
Fruits are the most beneficial to the skin because they are rich in vitamins, minerals, and antioxidants. These nutrients help to nourish the skin, improve its texture, and promote a healthy complexion. Fruits also contain high amounts of water, which helps to keep the skin hydrated and prevent dryness. Additionally, certain fruits like berries and citrus fruits are particularly beneficial for the skin due to their high content of antioxidants, which help to protect against damage from free radicals and promote a youthful appearance.
9.
Which of these does not determine the color of the skin?
Correct Answer
D. Fibrinogen
Explanation
Melanin and carotene are pigments that contribute to the color of the skin. Melanoid is a term used to describe substances that resemble melanin. However, fibrinogen is a protein involved in blood clotting and does not play a role in determining the color of the skin.
10.
What layer of the skin contains the papillary and the reticular regions?
Correct Answer
A. Dermis
Explanation
The dermis is the layer of skin that contains the papillary and the reticular regions. The papillary region is the upper layer of the dermis, consisting of loose connective tissue that contains blood vessels and nerve endings. The reticular region is the lower layer of the dermis, composed of dense connective tissue that provides strength and elasticity to the skin. The dermis also contains sweat glands, hair follicles, and sebaceous glands.