Lecture 3: Integument & Barriers Flashcards by Danielle Collins

Q

A

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Q

Name A and the tissue type

A

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Q

What type of epithelium is this?

A

Stratified Squamous Nonkeratinized

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Q

What type of epithelium is this?

A

Stratified squamous keratinized

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Q

What type of epithelium is this?

A

Stratified cuboidal epithelium

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Q

What type of epithelium is this?

A

Stratified columnar epithelium

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Q

What type of epithelium is this?

A

Pseudostratified columnar epithelium

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Q

What type of epithelium is this?

A

Transitional epithelium

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Q

What type of epithelium is this?

A

Simple cuboidal epithelium

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Q

What type of epithelium is this?

A

Simple columnar epithelium

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Q

What structure is this and what is its purpose?

A

Microvilli -> surface specialization to increase cell surface area

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Q

What is this structure and what is its purpose?

A

Stereocilia -> specialized for absorption and secretion

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Q

Label 1-4

A

1) Zonula Occludens (tight junction)
2) Zonula Adherens (adhering junctions)
3) Macula adherens (desmosomes)
4) Gap Junctions (Connexins)

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Q

What structure is holding the 2 cell membranes together?

A

Tight junction

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Q

What is the structure in the picture?

A

Basement membrane made up of basal lamina and the reticular lamina

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Q

What structure is shown in the picture?

A

Hemidesmosomes

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Q

What is this a picture of in general?

A

skin

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Q

What type of skin is shown in the picture?

A

Thick skin

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Q

Label A-C

A

A) Duct of sweat gland

B) Sweat gland

C) Subcutaneous adipose tissue

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Q

What type of skin is this?

A

Thin skin

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Q

Label A-C

A

A) Upper part of hair follicle

B) Sebaceous gland

C) Sweat gland

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Q

What structure is the arrow pointing at?

A

Pacinian corpuscle

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Q

What structure is the arrow pointing at?

A

Ruffini end organ

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Q

What structure is the arrow pointing at?

A

Peritrichial nerve ending

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What structure is the arrow pointing at?

Meissner's corpuscle

What is this a picture of?

Peritrichial nerve endings wrapped around the base of the hair follicle - Stimulated by hair movement

What layer of the skin are peritrichial nerve endings wrapped around the base of the hair follicle found in?

Reticular layer of the dermis

What 2 structures are the arrows pointing at?

left arrow = merkel cell Right arrow = melanocyte

Label A-D

A) Keratinocytes B) Merkel cell C) Langerhans cell D) Melanocyte

What structure is the arrow pointing at?

Meissner's corpuscle

What layer of the skin is this

reticular layer of the dermis

What structure is being depicted in the picture?

Desmosome

What is the arrow pointing at?

Melanocyte

What structure is the arrow pointing at?

Pacinian corpuscle

What layer of the skin is the arrow pointing at?

Stratum Lucidium of the Epidermis

What cell type is this?

Keratinocytes

Label A-C

A) Melanocytes B) Debdrites C) Keratinocyte

Label A-C

A) Stratum corneum B) Stratum lucidium C) Stratum granulosum

Label D & E

D) Stratum spinosum E) Stratum basale

What structure is this?

Ruffini end organ in the reticular layer of the dermis

What structures do the arrows depict?

Top arrow = ruffinis end organ Bottom arrow = pacinian corpuscle

Label A-C

A) Stratum corneum B) Stratum lucidium C) Stratum granulosum

Label D-F

D) Stratum spinosum E) Stratum Basale F) Dermis

Label G-J

G) Dead keratinocytes H) Lamellar granules I) Keratinocytes J) Langerhans cell

Label K-N

K) melanocytes L) merkel cell M) tactile disc N) sensory neuron

What 2 cell types are depicted in this picture?

Label A-C

A) Epidermis B) Dermis C) Hypodermis

What cell type is "L"?

Langerhans cells

What cell type is this?

melanocytes

What layer of the skin is this?

Stratum spinosum of the epidermis

What structure is depicted with the arrows?

hemidesmosomes

What structure is depicted in this picture?

hemidesmosomes

What layer of the skin is this?

Stratum spinosum of the epidermis

What cell type is depicted in the picture?

Merkel cell

Where are stereocilia found?

Epididymis and inner ear

Lamina ________ = extracellular glycoproteins (entactin, integrins and laminin)

lucida

Lamina ______ = meshwork of collagen IV fibrils

Densa

Reticular lamina is produced by fibroblasts and composed of what two types of collagen?

I and III

What 2 types of laminin make up the basement membrane?

Basal lamina and reticular lamina

What is the largest organ in the body?

Skin - 16% of body weight

Thick skin has a very thick stratum \_\_\_\_\_\_\_\_

Corneum

What types of glands does thick skin have?

Only sweat glands - No sebaceous glands

Thin skin has a thin stratum \_\_\_\_\_\_\_\_

corneum

What layer of the skin is avascular?

Epidermis

Where is the final location of melanin?

Keratinocytes in the epidermis

Where do melanocytes exist?

Stratum basale -\> no desmosomes

Where do dendritic cells mainly exist?

Stratum spinosum

What layer of the skin do merkels cells exist in the most?

Stratum basale - More numerous in thick skin! - Can give rise to bery bad skin cancer

Dermatoglyphs: fingerprints/epidermal ridges are only present in what skin type?

Thick skin

The dermis has a rich blood supply and is made up of CT derived from \_\_\_\_\_\_\_\_

Mesoderm

What are the 2 layers of the dermis from outer to inner

Papillary -\> reticular

What mechanoreceptor is found in the papillary layer of the dermis, is an encapsulated touch receptor and is prominent in lips, finger tips, plantar feet and genitals?

Meissner's corpuscle

The reticular layer of the dermis is made up of dense irregular CT made of what 2 things?

Type I collagen Elastic fibers

What 3 mechanoreceptors are found in the reticular layer of the dermis?

Pacinian corpuscles Ruffini end organ (krause end bulbs) Peritrichial nerve endings

What mechanoreceptor has an onion like appearance, is an encapsulated pressure receptor, is larger and less numerous than meissner's corpuscles and is also present in the hypodermis?

Pacinian corpuscles

What mechanoreceptor responds to stretching and is present in skin and joint capsules?

Ruffini end organ

What mechanoreceptor is a nerve fiber wrapped around the base of the hair follicle and stimulated by hair movement?

Peritrichial nerve ending

The hypodermis is made of loose CT developed from \_\_\_\_\_\_\_\_\_

Mesoderm

Sweat glands are _______ tubular

Coiled

Sebaceous glands are _______ alveolar

Branched

Holocrine glands are a type of __________ gland

Sebaceous

Merocrine and apocrine glands are types of _________ glands

sweat

Where are glands found in the skin?

In the deep dermis or hypodermis

What gland type is abundant on the face and scalp, none are found on palms or hands, they have a single duct, and are usually associated with hair follicles?

Sebaceous glands

What is the most abundant type of sweat gland and is located throughout skin especially thick skin, is not found on the lips and genitals, and produce a water secretory product as part of thermoregulation?

Eccrine sweat glands

Which sweat gland is limited to the axilla, pubic region, anal region, areola and external genitalia and secretes a viscous secretory product in response to hormones?

Appocrine glands

Ceruminous glands are a type of specialized apocrine gland that secretes what?

Ear wax

Ciliary glands (of Moll) are a specialized type of apocrine gland that are associated with what?

Eye lids and eye lashes

What type of epithelium is found in the secretory portion versus duct portion of sweat glands?

Secretory portions = simple cuboidal epithelium Duct portion = stratified cuboidal epithelium

What gland type is this?

Sebaceous

What gland type is this?

Sweat gland