Chapter 5: skin

Question 1

lamellar granules

Answer 1

present in keratinocytes and release a lipid rich secretion which acts as a water repellent sealant and repels entry of foreign materials.

Question 1

sebaceous glands

Answer 1

secrete oily substance called sebum that prevents excessive water evaporation from the skin
largely found in skin of breasts, face, neck, chest

Question 2

epidermal layers from deep to superficial

Answer 2

stratum basale
stratum spinosum
stratum granulosum
stratum lucidum (in thick skin only)
stratum corneum

Question 3

hair matrix

Answer 3

epidermal stem cells
site of cell division
produce new hair when old ones are shed

Question 4

list the skin sequence from outside to inside

Answer 4

epidermis
papillary layer
reticular layer
subcutaneous layer

Question 5

Meissner corpuscles or tactile corpuscles are?

Answer 5

nerve endings that are sensitive to touch

Question 6

sudoriferous glands

Answer 6

release sweat into hair follicles or onto the skin through pores.
sweat glands are divided into two main types
1.eccrine
2. apocrine

Question 7

dermal papillae

Answer 7

under the surface of epidermis
all contain capillary loops (blood vessels)
some contain tactile receptors or free nerve endings

Question 8

external root sheath

Answer 8

is a downward continuation of the epidermis

Question 9

internal root sheath

Answer 9

is produced by the matrix and forms a cellular tubular sheath of epithelium between the external root sheath and the hair

Question 10

group of tissues that perform a deinite function is called

Answer 10

an organ

Question 11

epidermis

Answer 11

the superficial, thinner portion composed of epithelial tissue
avascular

Question 12

dermis

Answer 12

the deeper, thicker connective tissue portion
vascular

Question 13

stratum lucidum

Answer 13

only in thick skin like palms, soles, plantar surfaces of toes

Question 14

Eccrine sweat glands

Answer 14

for thermoregulation (watery sweat)
produces sweat
in the dermis

Question 15

apocrine sweat gland

Answer 15

odoriferous and produces sweat/cerumen; produces more protein and lipid type substance
found in armpit, scrotum, prepuce, labia minora, nipples, and periananl region
in the dermis

Question 16

dermis contains?

Answer 16

sebaceous glands
hair follicles
sweat glands

Question 17

what kind of muscle is arrecto pilli?

Answer 17

smooth muscle

Question 18

what lies beneath the dermis?

Answer 18

loose connective tissue called hypodermis or subcutaneous tissue (superficial fascia)
which contains adipose cells