front 1 Mitosis takes place in the layer of epidermis called the stratum basale. | back 1 Mitosis takes place in the layer of epidermis called the stratum corneum. |
front 2 Caucasian skin color is caused by less melanin in the skin, allowing the blood pigment to be seen. | back 2 Caucasian skin color is caused by the absence of all pigment. |
front 3 What do carrots and sweet potatoes have in common with human epidermis? They contain the pigment carotene. | back 3 What do carrots and sweet potatoes have in common with human epidermis?
They synthesize melanocytes. |
front 4 What is the name of a layer of dense, irregular connective tissue containing interlacing bundles of collagenous and elastic fibers?
Reticular layer of the dermis | back 4 What is the name of a layer of dense, irregular connective tissue containing interlacing bundles of collagenous and elastic fibers?
Papillary layer of the dermis |
front 5 Why is keratin important to the skin? It makes the stratum corneum thick, tough, and water-repellant. | back 5 Why is keratin important to the skin?
It keeps the stratum lucidum moisturized. |
front 6 The layer of skin attached to the hypodermis is the reticular layer of the dermis. | back 6 The layer of skin attached to the hypodermis is the papillary layer of the dermis. |
front 7 What is the name for melanin that forms into patches? Freckles | back 7 What is the name for melanin that forms into patches?
Nevus (mole) |
front 8 What is another name for the cuticle? Eponychium | back 8 What is another name for the cuticle? Lunula |
front 9 The sudoriferous glands form perspiration. | back 9 The ceruminous glands form perspiration. |
front 10 The nails are modifications of the epidermal layers corneum and lucidum. | back 10 The nails are modifications of the epidermal layers granulosum and spinosum. |
front 11 Sebaceous glands produce an oily mixture of cholesterol, fats, and other substances. | back 11 Sebaceous glands produce a
waxy secretion called cerumen. |
front 12 What function does the bulb at the base of a hair follicle serve? To provide nutrients to the growing hair. | back 12 What function does the bulb at the base of a hair follicle serve?
To inject melanin into the hair. |
front 13 The skin is derived from ectoderm and mesoderm. | back 13 The skin is derived from ectoderm, mesoderm and endoderm. |
front 14 Loss of body fluids through the integument is restricted by keratin. | back 14 Loss of body fluids through the integument is restricted by carotene. |
front 15 Which epidermal layer is lacking within the skin of the head and trunk? Stratum lucidum | back 15 Which epidermal layer is lacking within the skin of the head and trunk?
Stratum granulosum |
front 16 What is the proper sequence of epidermal layers pierced as a nail penetrates the epidermis on the sole of the foot? Corneum, lucidum, granulosum, spinosum, basale | back 16 What is the proper sequence of epidermal layers pierced as a nail penetrates the epidermis on the sole of the foot?
Corneum, lucidum, spinosum,
granulosum, basale |
front 17 Produced in the epidermis of the skin, melanin protects against ultraviolet light. | back 17 Produced in the epidermis of the skin, melanin prevents infections. |
front 18 The most probable cause of alopecia is genetic inheritance. | back 18 The most probable cause of alopecia is protein deficiencies. |
front 19 In the skin layers, the protein keratin forms a barrier to water-soluble substances. | back 19 In the skin layers, the protein keratin serves as a barrier to ions and salts. |
front 20 The skin conserves body heat by reducing secretions of sweat. | back 20 The skin conserves body heat by producing heat-tolerant hormones. |
front 21 One of the functions of the skin is to serve in the absorption of certain fat-soluble vitamins. | back 21 One of the functions of the skin is to serve in the absorption of
digestive enzymes. |
front 22 Intercellular junctions occurring within the stratum spinosum are referred to as desmosomes. | back 22 Intercellular junctions occurring within the stratum spinosum are referred to as gap junctions. |
front 23 Two important cells found in the stratum basale are melanocytes and keratinocytes. | back 23 Two important cells found in the stratum basale are hair cells and gland cells. |
front 24 Five layers of epithelium are found on the palms of the hand and soles of the feet. | back 24 Five layers of epithelium are found face and neck. |
front 25 About 25 layers of dead and dry squamous cells make up the stratum corneum. | back 25 About 25 layers of dead and dry squamous cells make up the dermis. |
front 26 In the stratum corneum, the cytoplasm of most cells has been replaced by keratin. | back 26 In the stratum corneum, the cytoplasm of most cells has been replaced by cerumin. |
front 27 All living cells of the epidermis receive their nourishment from blood vessels located in the dermis. | back 27 All living cells of the epidermis receive their nourishment from blood vessels located in the basement membrane. |
front 28 The dermis and epidermis are anchored to one another by dermal papillae. | back 28 The dermis and epidermis are anchored to one another by gap junctions. |
front 29 Muscle fibers may be located in the dermis but not the epidermis. | back 29 Muscle fibers may be located in the epidermis but not the dermis. |
front 30 Arrector pilli muscles are associated with the hair follicles. | back 30 Arrector pilli muscles are associated with the epidermis. |
front 31 Lanugo is extremely fine hair associated with the fetus. | back 31 Lanugo is extremely fine hair associated with the back of the neck. |
front 32 The protein material of the nail results from the metabolism of cells beneath the cuticle at the base of the nail. | back 32 The protein material of the nail results from the metabolism of cells
in the reticular layer of
the dermis. |
front 33 The terms eccrine and apocrine refer to two types of sweat glands. | back 33 The terms eccrine and apocrine refer to ceruminous glands. |
front 34 The function of cerumen is to help trap foreign substances before they enter the ear. | back 34 The function of cerumen is to secrete milk. |
front 35 The nail consists of a curved plate of keratin. | back 35 The nail consists of a layer of stratum corneum over a layer of
stratum lucidum. |
front 36 The secretion of sebaceous glands enters the hair follicle. | back 36 The secretion of sebaceous glands enters the apocrine glands. |