Chapter 04: Skin and Body Membranes

Which of these is associated with a skin allergy? a. Contact dermatitis b. Cold sores c. Impetigo d. Psoriasis

a. Contact dermatitis

The terms sheath, bulb, and follicle all relate to which of the following? a. Hair b. Hormones c. Sweat d. Homeostasis

a. Hair

Sebaceous glands produce oils whereas the __________ glands produce sweat. a. sudoriferous b. None of these answers is correct. c. melanin d. basal

a. sudoriferous

Which of the following statements regarding the significance of alterations in skin color is FALSE? a. None of the statements is false. b. Blanching (or pallor) may signify anemia, low blood pressure, allergy, or impaired blood flow into an area. c. Bruises reveal sites where blood has escaped from the circulation and become hematomas. d. Erythema may indicate embarrassment, fever, inflammation, or hypertension. e. Jaundice usually signifies a liver disorder in which excess bile pigments are deposited in body tissues.

b. Blanching (or pallor) may signify anemia, low blood pressure, allergy, or impaired blood flow into an area.

The epidermis is composed of __________ tissue. a. connective b. epithelial c. nervous d. muscular

b. epithelial

Which of these factors is/are the most likely cause of permanent hair loss? a. Dietary deficiency of protein b. Chemotherapy c. Genes d. Emotional crisis

c. Genes

Which of the following statements is NOT true regarding melanin? a. Melanin is produced by special cells called melanocytes. b. The stratum basale cells phagocytize the melanin produced by the melanocytes and it accumulates within them. c. More melanin is produced when the skin is not exposed to sunlight. d. Freckles and moles are seen where melanin is concentrated in one spot. e. Melanin ranges in color from yellow to brown to black.

c. More melanin is produced when the skin is not exposed to sunlight.

Sebaceous glands are usually associated with __________. a. melanocytes b. sweat glands c. hair follicles d. nails

c. hair follicles

Hair, nails, and the outer layer of the skin are made mostly of a tough waterproof protein called __________. a. melanin b. elastin c. collagen d. keratin

d. keratin

As cells progress from the deeper portion of the epidermis toward the surface, __________. a. they become dermal cells b. they divide continually by mitosis c. they divide continually by meiosis d. they tend to die e. their supply of nutrients improves

d. they tend to die

The type of tissue making up the bulk of the dermis is __________. a. adipose connective tissue b. visceral (smooth) muscle c. stratified squamous epithelium d. transitional epithelium e. dense (irregular) connective tissue

e. dense (irregular) connective tissue