Integumentary system

Question 1

Epidermis

Answer 1

outermost layer of skin, keratinized stratified squamous epithelium.

Question 2

Keratinocyte

Answer 2

produces keratin( protection)

Question 3

melanocyte

Answer 3

synthesize pigment(melanin) found in deepset layer of epidermis

Question 4

stratum corneum

Answer 4

superficial layer made of dead cells called Keratinocytes, contain Keratin. AKA: Horny layer

Question 5

stratum lucidum

Answer 5

found only in soles of feet and palms

Question 6

stratum granulosum

Answer 6

Cytoplasmic granules, contain keratin( an oily waterproofing substance) WATERPROOFING

Question 7

Stratum Spinosum

Answer 7

Melanin found here, protects from UV light and decreases production of Vit D

Question 8

Stratum Basale

Answer 8

deepest epidermal layer. single row of actively dividing cells

Question 9

Dermis

Answer 9

Second layer of skin felxible connective tissue. two layers, the papillary and reticular layers

Question 10

Dermal papillae

Answer 10

Finger like projections that contain Meissners corpuscles(touch receptors).Found in papillary layer

Question 11

Pacinian (lamellated) corpuscle

Answer 11

Pressure Receptors. located in Retcular layer

Question 12

Meissner’s (tactile) corpuscle

Answer 12

Touch receptors. Found in Dermal papillae

Question 13

Hypodermis

Question 14

Sweat Gland

Answer 14

Exocrine gland that secretes sweat

Question 15

Sebaceous gland

Answer 15

exocrine gland that secretes Sebum(oil)

Question 16

Hair follicle

Answer 16

Epithelial tissue lined sheath, surrounding hair bulb.

Question 18

Arrector Pili Muscle

Answer 18

Smooth muscle attached to hair follicle , contractions cause hair to stand upright.

Question 20

Langerhans cells (dendritic cells)

Answer 20

arise from bone marrow, migrate to epidermis. Ingest foreign substances activators of immune system.

Question 21

Tactile(merkle) cells

Answer 21

Epidermis/dermis junction. Sensory receptor for touch

Question 22

Papillary layer

Answer 22

Made of loose connective tissues that contains dermal papillae(touch receptors)

Question 23

Reticular Layer

Answer 23

Composed of dense irregular collagenous connective tissue. Houses sweat glands, sebacous glands(oil) and Pacinian corpusles(Lamallated)