Exam 3 Flashcards
The outermost sheath of a hair follicle is the connective tissue root sheath, T/F?
True
The protein found in large amounts in the outermost layer of epidermal cells is collagen T/F?
False
A needle would pierce the epidermal layers of the forearm in which order?
A. granulosum,basale, spinous, corner
B. Basale, spinosum, granulosum, lucidum, corneum
C. Corneum, granulosum, spinosum, basale
C. Corneum, granulosum, spinosum, basale
The major regions of a hair shaft include all of the following except ________.
External root sheath
Which of the following cutaneous receptors is specialized for the reception of touch or light pressure?
Meissner’s corpuscles
The integumentary system is protected by the action of cells that arise from bone marrow and migrate to the epidermis. Which of the following cells serve this function?
Macrophages called dendritic cells ( Langerhans Cells)
What are five functions of the skin?
Protection from mechanical damage Protection against bacteria Maintaining body temp Absorption/excretion Stimuli reception
What glands are oil secreting?
Sebaceous glands
What is the difference between eccrine glands and apocrine glands?
Eccrine glands are smaller and excrete directly onto the skin, Apocrine typically has odor
The two basic tissues of which the skin is composed are dense irregular connective tissue, which makes up the dermis and ______.
Keratinized stratified squamous epithelium
The tough water repellent protein found in the epidermal cells is called_____.
Keratinocytes
The pigments melanin and ______ contribute to skin color.
Hemoglobin and Carotene
A localized concentration of melanin is referred to as ______.
Freckle
Four protective functions of the skin are ______.
Insulation/cushion
Regulate body temp
Protect from mechanical damage
protect from bacterial attack
Layer of translucent cells in thick skin containing dead keratinocytes
Stratum lucidum
Two layers containing dead cells
Stratum corneum
Dermal layer responsible for fingerprints
Papillary layer
Vascular region of the skin as a whole
Dermis
Major skin area as a whole that produces derivates like nails and hair.
epidermis
Epidermal layer exhibiting the most rapid cell division
Stratum basale
Layer including scalelike dead cells, full of keratin, that constantly slough off
Stratum corneum
Layer filled with intermediate fillaments
Stratum spinosum
Major skin area as a whole that has abundant elastic and collagen fibers
Reticular layer
Location of melanocytes and tactile cells
Stratum basale
