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Functions of the skin include the following:
Thermoregulation, sensory reception, and vitamin D synthesis
Place the three kinds of hair in the order in which they grow over the course of our lives. The top of your list should contain the type of hair that appears first in a fetus.
3. terminal hair
Match the hair-type with the cross-sectional shape of the hair.
1. wavy hair ---> oval
2. straigh hair ----> round
3. tightly curly hair ----> flat
List the tissue types found in the dermis.
Connective tissue, muscular tissue, epithelial tissue, and nervous tissue.
_______ glands secrete a substance that combines with sebum to keep the eardrum protected and prevent foreign particles from entering the canal.
________ is a protein produced in the cells of the epidermis that improves its durability and resistance to infection.
The structures that guard the nostrils and ear canals, preventing foreign particles from entering these areas are also called guard hairs or ____________.
List the epidermal layers that contain Langerhans (dendritic) cells.
stratum spinosum, and stratum granulosum
Describe the composition of sweat.
Acidic solution containing urea, potassium, sodium chloride and ammonia.
The arrow on the left of the figure is pointing to the integumentary layer called the ____________.
The portion of a fingernail or toenail that is attached to the tip of the digit (finger) is called the _______.
True or false: Melanin is the component of skin that is the primary determinant of skin color.
List conditions that commonly lead to the contraction of the piloerector muscles.
Cold, fear, and touch.
List the features of skin that minimizes bacteria and fungi growth during an infection.
The acid mantle inhibits microbial growth. The cells of the skin shed frequently.
The dryness of the skin inhibits microbial growth.
Mechanical stress from manual labor accelerates keratinocyte multiplication. This results in formation of _______ or corns on the hands or feet.
The term _______ describes the condition in which sweat is produced, causing noticeably wet skin during circulatory shock or exercise.
Describe the stratum basale
Simple cuboidal stem cells and melanocytes resting on a basement membrane.
_________ glands are flask-shaped, with short ducts that usually open into a hair follicle and directly onto to skin.
Unlike sweat glands and ceruminous glands, mammary glands:
Are usually active only in pregnant and lactating females.
A condition called _________ is a yellowing of the skin and whites of the eyes resulting from high levels of bilirubin in the blood
Name the flat melanized patches found on the skin that vary with heredity and exposure to the sun.
The hair types called _______ constitutes about two-thirds of the hair in women and one-tenth of the hair in men.
______ is blueness of the skin resulting from a deficiency of oxygen in the circulating blood.
The dermis consists of connective tissue, with ______ as the most common fiber type within the layer.
In the process of thermoregulation, cutaneous nerve endings monitor the _______ of the body surface.
Oxygen and nutrients needed by the epidermal cells undergoing mitosis are acquired from blood vessels in the _______.
Within a hair follicle, the _______ root sheath is an extension of the epidermis, and lies adjacent to the hair root.
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