1) Dermatoglyphics is the study of a) Structural basis of skin colour b) The organ of the integumentary system include the skin and its accessory structures. c) Aging and the integumentary system d) The study of the pattern of epidermal ridges. 2) Fingerprints is created by a) Ridges. b) Uneven ridges c) Epidermal ridges d) Melanin. 3) What is the function of ridges in the dermis? a) Helps the epidermis bind to the dermis b) Indicate the predominant direction of underlying collagen fibers. c) Increase firmness of grip by increasing friction d) Attaches the skin to underlying tissues and organs. 4) Lighter pigments and freckles are produced by a) Eumelanin b) Melanocyte c) Phaeomelanin d) Epidermis 5) Darker pigments is produced by a) Eumelanin b) Phaeomelanin c) Melanocyte d) Dermis 6) Dermis is the a) Contains 4 major layers b) Consists of stratum basale, stratum spinosum and stratum granulosum. c) Deepest layers of skin and 10-20 times thicker than epidermis d) Composed of connective tissue containing collagen and elastic fibres 7) 54) Do some people have more melanocytes than other people? a) Yes b) NO c) According to number of melanin produced by melanocytes d) According to number of melanocytes in the body. 8) Keratinocytes produce keratin which is a) Involved in immunes responses. b) A tough fibrous protein that provides protection c) Arise from bone marrow d) Produce the pigment melanin that protects against damage by ultraviolet radiation. 9) According to American Academy of Dermatology (AAD), skin is made up of a) 19 million skin cells, 650 sweat glands, 20 blood vessels and 1000 nerve endings b) 20 million skin cells, 700 sweat glands, 20 blood vessels and 1000 nerve endings c) 19 million skin cells, 650 sweat glands, 25 blood vessels and 2000 nerve ending d) 18 million skin cells, 650 sweat glands, 20 blood vessels and 1000 nerve endings. 10) The largest organ of the body by surface area and weight is a) Brain b) Skin c) Liver d) Heart 11) Scalelike modification of the epidermis that forms a clear protective covering on the dorsal surface of a finger or toe is a) nail b) burn c) acne d) keratin 12) What are the functions of the skin? a) Stores fat,anchors the skin and acts as shock absorber b) Papillary and reticular c) Regulates body temperature, Produces Vitamin D, Protection from chemical and physical injury, Blood reservoir, Excretion of nitrogenous wastes d) Hair on skin sense insects before they stingor bite,hair on scalp protects from physical trauma,heat loss,sunvurn,eyelashes shiled eyes,nose hairs fliter particles in the air 13) What are the three types of skin cancer? a) Vellus and terminal b) basal cell carcinoma, squamous cell carcinoma, melanoma c) basal cell carcinoma d) epidermis,dermis,hypodermis 14) The least malignant and most common type of skin cancer is a) first degree burn b) basal cell carcinoma c) basal cell carcinoma,squamous cell carcinoma,melanoma d) Meissner’s corpuscles 15) The most dangerous skin cancer is a) Melanocyte b) Hormones c) Keratinocyte d) Melanoma 16) Asymmetry, Border irregularity, Color, Diameter, (Elevation) is a) ABCD(E)rules b) Stratum basale c) Epidermis d) Langerhans’ cell 17) Tissue damage inflicted by intense heat, electricity, radiation, or certain chemicals, which denature proteins and cause cell death a) Burn b) Keratin c) Melanin d) Nail 18) It involves only epithelium; redness, heat (i.e. sunburn a) Basal cell carcinoma b) First degree burn c) Stratum granulosum d) Stratum lucidum 19) What are the chief regions of the hair? a) Shaft and root b) Demal papillae c) Papillary and reticular d) Basal cell carcinoma,squamous cell carcinoma,melanoma 20) Hair thinning and balding is called a) Alopecia b) Melanoma c) Carolene d) sudoriferous

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