Physiology & Histology (chapter 10)
What color is EUmelanin?
Dark brown to black
What is color Eumelanin?
Dark brown to black
What protein fiber that is found in the dermis gives skin its flexibility and firmness?
Elastin
What stimulates melanin production?
Exposure to sunlight
1,300 feet of nerves are contained in each square inch of skin.
False
Afferent nerve fibers are also known as motor nerve fibers.
False
Eccrine glands are taste buds.
False
Efferent, nerve fibers convey impulses from the muscle to the spinal cord.
False
Follicles are sweat glands openings.
False
Healthy Skin is highly acidic.
False
Lymph is oil that provides protection for the epidermis from external factors and that lubricates the skin.
False
Nails contain nerves and blood vessels.
False
Oil comprises about 50 to 70 percent of the skin.
False
People with darker skin have more melanocytes than people with lighter skin.
False
Proteins and peptides trigger the intercellular matrix and cells to rejuxvante.
False
Skin is highly absorbent.
False
Skin is thickest on the knees and elbows.
False
The amount of water we drink has the greatest impact on how our skin ages.
False
The average pH of the acid mantle is 2.5
False
The building blocks of body tissues are fats.
False
The epidermis is significantly thicker than the dermis.
False
Nicotine has what effect on the body?
It constructs your blood vessels
What forms the cells in the stratum granulosum that resemble granules?
Keratin
What component of the dermis is involved in allergic reactions?
Mast cells
What does sunlight stimulate?
Melanin
What substance in the skin provides protection from the sun?
Melanin
What are chains of amino acids known as?
Polypeptides
How does sebum protect the skin?
Protect the skin surface and lubricates both the skin and hair.
What are the skin main functions of the skin?
Protection, sensation, heat, regulation, excretion, secretion, absorption.
What does barrier function mean?
Protective barrier of the epidermis; the corneum and intercellular matrix protect the surface from irritation and dehydration.
What are the building blocks of the body tissue?
Proteins
What do the sudoriferous glands do?
Regulate body temp (sweat)
What glands does secrete oil?
Sebaceous glands
Where in the body is hyaluronic acid found?
Skin
What term refers to the study of the structure and composition of the skin tissues?
Skin histology
What is a characteristic of healthy skin?
Slightly acidic
Name the five layers of the epidermis
Stratum corneum, Stratum lucidum, Stratum granulosum, Stratum spinosum, Stratum germinativum
What is the bottom layer of the epidermis?
Stratum germinativum
What's the last layer of the epidermis?
Stratum germinativum
What layer of the skin is known as the grainy cells?
Stratum granulosom
What is the name of the grainy layer?
Stratum granulosum
What part of the epidermis is known as the clear cells?
Straum Lucidum
What epidermal layer is composed of a single layer of basal cells?
Straum germinativum
What part of the skin gives contour and smoothness to the body?
Subcutaneous tissue
What is the dermis?
Support layer below the epidermis
What is skin histology?
The studying of the structure and composition of the skin tissue.
Where do the phytoestrogens come from?
They come from planets
What are free radicals?
Toxic compounds created in the body that may contribute to certain chronic diseases
Afferent nerve fibers send messages to the brain to heat, cold, pain, pressure, and touch.
True
Appendages of the skin include hair, nails, sweat glands, and oil glands.
True
Each square inch of skin contains 8 feet of blood vessels.
True
Evaporation caused transepidermal water loss.
True
Free radicals produce more free radicals while causing oxidation reactions.
True
Goosebumps are the result of the contraction of the arrestor pili muscle.
True
Healthy skin is slightly acidic.
True
Hormones, growth factors, and other biochemicals control the skins functions.
True
Proteins are the basic material and building blocks of the body tissues.
True
Secretory nerve fibers are motor nerves attached to sweat and oil glands.
True
Skin histology is the study of the structure and composition of the skin tissue?
True
Skin is also known as the integumentary system.
True
Skin is the largest organ in the body.
True
The body perspires to protect us from overheating
True
The six primary functions of the skin are protection sensation, heat regulation, excretion, secretion, and absorption.
True
The skin plays a significant role in the regulations of body temp.
True
The dermis has how many layers?
2
What is the average skin cell turnover rate?
28 days
What is another name for subcutis tissue?
Adipose tissue
What do peptide bonds hold together?
Amino Acids
What are the two types of sweat glands?
Apocrine and eccrine
What is the common name for the stratum germinativum?
Basal cell layer
