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HISTOLOGY LECTURE > MIDTERM Integumentary > Flashcards

MIDTERM Integumentary Flashcards

1
Q

Give the 5 functions of the Skin

A
  1. Resistance to trauma and infection
  2. Other barrier functions
  3. Vitamin D synthesis
  4. Sensation
  5. Thermoregulation
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2
Q

an epithelial tissue in the form of keratinized stratified squamous epithelium

A

Epidermis

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3
Q

a connective tissue layer in the form of dense fibrous irregular connective tissue

A

Dermis

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4
Q

loose connective tissue containing fat or adipose tissue

A

Hypodermis or subcutaneous

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5
Q

3 layers of the skin

A
  1. Epidermis
  2. Dermis
  3. Hypodermis or subcutaneous
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6
Q

Epithelial tissue which is composed of 4 different types of cells:

A
  1. Keratinocytes
  2. Melanocytes
  3. Langerhans cells / dendritic cells
  4. Merkel cells
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7
Q

most numerous and most prominent; these cells that are transformed into keratin

A

Keratinocytes

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8
Q

produce skin pigment or skin color

A

Melanocytes

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9
Q

defense cells; antigen-presenting cells (APC)

A

Langerhans cells / dendritic cells

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10
Q

for tactile/touch sensation

A

Merkel cell

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11
Q

The keratinocytes form five distinct layers of the epidermis:

A
  1. stratum basale / germinativum
  2. stratum spinosum.
  3. stratum granulosum / granular layer
  4. stratum lucidum / clear cell layer
  5. stratum corneum.
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12
Q

consists of 15 - 20 layers of flattened keratinized cells- cytoplasm is filled with keratin; surface cells continuously shed off

A

Stratum Corneum

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13
Q

seen only in thick skin; flattened clear cells devoid of nuclei and organelles

A

Stratum Lucidum / clear cell layer

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14
Q

3-5 layers of flattened polygonal cells whose cytoplasm is filled with darkly basophilic granules called keratohyaline granules

A

Stratum Granulosum / granular layer

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15
Q

single layer of columnar or cuboidal cells which undergo intense mitosis for constant production of epidermal cells

A

Stratum Basale / germinativum

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16
Q

thickest layer; consist of polyhedral cells

A

Stratum Spinosum

17
Q

upward projections of the dermis, called…

A

Dermal Papillae

18
Q

interdigitate with evaginations of the epidermis are calledl

A

Epidermal Ridges

19
Q

dense fibrous irregular tissue that supports the epidermis and binds it to the underlying hypodermis

A

Dermis

20
Q

2 Layers of the Dermis

A
  1. Papillary layer
  2. Reticular Layer
21
Q

superficial layer containing dermal papilla

A

Papillary Layer

22
Q

thicker deeper layer containing skin appendages

A

Reticular Layer

23
Q

found all over the body EXCEPT for palms of hands and soles of feet.

A

Sebaceous Glands

24
Q

mucus glands associated with hairs

A

Sebaceous Glands

25
Q

In Sebaceous Glands it secrete an oily substance called…

A

Serum

26
Q

elongated keratinized structures derived from the hair follicle.

A

Hair / Hair Follicle

27
Q

Skin Appendages consist of these 4:

A
  1. Sebaceous glands
  2. Hair and Hair follicle
  3. Arrector Pili muscle
  4. Sweat glands
28
Q

3 Types of Hair

A
  1. Vellus hairs
  2. Terminal hairs
  3. Lanugo
29
Q

soft, fine, short and pale

A

Vellus Hair

30
Q

hard, large, coarse, long and dark hairs of the scalp and eyebrows

A

Terminal Hair

31
Q

fine hair present on the fetus

A

Lanugo

32
Q

band of smooth muscle fiber attached to the hair follicle

A

Arrector Pili Muscle

33
Q

upon its contraction, forms tiny “goose bumps” on the skin surface

A

Arrector Pili Muscle

34
Q

serous glands; secretory portions are coiled

A

Sweat Glands

35
Q

2 types of Sweat Glands

A
  1. Eccrine (merocrine) sweat glands
  2. Apocrine (holocrine) sweat glands
36
Q

largely confined to the axillary and the anogenital regions

A

Apocrine (holocrine) sweat glands

37
Q

abundant on palms of hands, soles of feet and the forehead.

A

Eccrine (merocrine) sweat glands

HISTOLOGY LECTURE (6 decks)

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