1.4 (Quiz 1) Flashcards by Sierra Norman

Q

Single cell layer

A

Stratum basale (Stratum germinativum)

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Q

Attached to basement membrane

A

Stratum basale (Stratum germinativum)

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Q

Mitotically active

A

Stratum basale (Stratum germinativum)

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Q

Many desmosomes

A

Stratum spinosum

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Q

Abundant keratin fibers

A

Stratum spinosum

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Q

Outer layer of Stratum spinosum cells has ___ that contain ___

A

lamellar bodies, glycolipids

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Q

Lamellar bodies of lipid and glycolipid

A

Stratum granulosum

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Q

Keratohyaline granules containing filaggrin

A

Stratum granulosum

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Q

Binding of keratin filaments to form bundles

A

Stratum granulosum

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Q

Waxy cell envelopes containing keratin

A

Stratum lucidum, Stratum corneum

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Q

Clear zone microscopically

A

Stratum lucidum

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Q

Found in thick skin only

A

Stratum lucidum

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Q

major cell type in epidermis

A

Keratinocytes (cell type of epidermis)

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Q

Provides barrier function

A

Keratinocytes (cell type of epidermis)

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Q

Produces Vitamin D precursor

A

Keratinocytes (cell type of epidermis)

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Q

Derived from neural crest

A

Melanocytes (cell type of epidermis)

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Q

Produce melanin pigment

A

Melanocytes (cell type of epidermis)

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Q

Derived from basal layer of epidermis (not neural crest)

A

Merkel cells (cell type of epidermis)

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Q

Mechanoreceptor function

A

Merkel cells (cell type of epidermis)

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Q

Derived from bone marrow cells

A

Langerhans (dendritic) cells (cell type of epidermis)

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Q

Potent antigen-presenting cells for T-lymphocytes

A

Langerhans (dendritic) cells (cell type of epidermis)

Q

No junctions with keratinocytes

A

Langerhans (dendritic) cells (cell type of epidermis)

Q

Found in outer stratum spinosum

A

Langerhans (dendritic) cells (cell type of epidermis)

Q

Migrate into and out of epidermis from dermis

A

Langerhans (dendritic) cells (cell type of epidermis)

Q

Carry antigens to lymph nodes draining skin via afferent lymph

A

Langerhans (dendritic) cells (cell type of epidermis)

Q

Important for discriminating shape and texture

A

Merkel cells (cell type of epidermis)

Q

Afferent nerve axon loses myelin sheath as it penetrated basement membrane

A

Merkel cells (cell type of epidermis)

Q

Forms a nerve plate at point of contact with Merkel cell membrane

A

Merkel cells (cell type of epidermis)

Q

Capillary network, Sensory nerve endings (Meissner)

A

Papillary layer

Q

Sweat glands, Capillary network w/ AV anastomoses, Sebaceous glands

A

Reticular layer

Q

vascular passage by which blood is diverted from its usual or normal path

A

shunt

Q

Associated with hair follicles

A

Sebaceous glands

Q

Branched acinar glands

A

Sebaceous glands

Q

Holocrine secretion: sebum

A

Sebaceous glands

Q

Product of dying sebaceous gland cells (lots of lipid)

A

Sebaceous glands

Q

Substrate for bacteria

A

Sebaceous glands

Q

Acne: chronic inflammation of sebaceous glands

A

Sebaceous glands

Q

Thermoregulation and mineral excretion

A

Eccrine sweat gland

Q

Simple coiled gland

A

Eccrine sweat gland

Q

Derived from ectoderm

A

Eccrine sweat gland

Q

Coiled tubular gland-lumen larger than eccrine sweat glands

A

Apocrine sweat gland

Q

Duct empties into canal of hair follicle

A

Apocrine sweat gland

Q

Protein rich secretion

A

Apocrine sweat gland

Q

Pain & temperature

A

Free nerve ending

Q

non specific Tactile

A

Meissner corpuscle, Merkel cell

Q

Tactile (hair movement)

A

Root hair plexus

Q

Tactile (pressure, vibration)

A

Pacinian corpuscle

Q

nerve endings adjacent to papillae; light touch

A

Merkel cells

Q

temperature, pain, itch

A

Free nerve endings

Q

elliptical structure adjacent to papillae; light touch

A

Meissner corpuscles

Q

concentric lamellae; coarse touch, pressure and vibrations

A

Pacinian corpuscles