integumentary system (ch 5)

Question 1

what are different names for skin?

Answer 1

the integument, dermal layer, or cutaneous membrane

Question 2

what does the integument consist of?

Answer 2

epidermis (a true epithelium) and dermis

Question 3

what kind of epithelium is the epidermis made of?

Answer 3

stratified squamous

Question 4

what kind of tissue is the dermis made of?

Answer 4

dense irregular connective tissue

Question 5

what lies below the dermis?

Answer 5

hypodermis (which is made of areolar and adipose tissues; considered a superficial fascia)

Question 6

name the five nerve receptors that detect certain feelings

Answer 6

Merkel’s, Meissner’s, Ruffini’s and Pacinian corpuscles,

along with free nerve endings

Question 7

What sensations do Merkel’s corpuscles detect?

Answer 7

fine touch or pressure (ie texture or shape); in EPITHELIUM

Question 8

What sensations do free nerve endings detect?

Answer 8

pain (free nerve endings are in dermis and base of epidermis)

Question 9

what sensations do Meissner’s corpuscles detect?

Answer 9

fine touch (dermis)

Question 10

what sensations do Ruffini corpuscles detect?

Answer 10

warmth (dermis)

Question 11

What do Pacinian corpuscles detect?

Answer 11

deep pressure (dermis)

Question 12

Name the five nerve endings in order, starting from the epidermis and going deeper

Answer 12

Merkel, free, Meissner, Ruffini, Pacinian

“My Friend Made Rice Pudding

Question 13

Name the two skin types

Answer 13

thin skin and thick skin

Question 14

What is the difference between the two skin types?

Answer 14

thin skin has sebaceous (oil), hair, and sweat glands, while thick skin only has sweat glands

Question 15

name the layers of the epidermis in order from superficial to deep

Answer 15

Corneum, Lucidum, Granulosum, Spinosum, Basale

“Come, Let’s Get Sun Burned”

Question 16

true or false: cells of lucidum and corneum have no nucleus and are dead

Answer 16

true

Question 17

where do hypodermal injections occur?

Answer 17

hypodermis

Question 18

what are the three major exocrine glands of the skin?

Answer 18

merocrine (aka eccrine), apocrine, holocrine (aka sebaceous)

Question 19

the gut tube is derived from the ___

Answer 19

endoderm

Question 20

epidermis and nerves are derived from ____ in embryos

Answer 20

ectoderm

Question 21

dermis and blood vessels are derived from ____ in embryos

Answer 21

mesoderm

Question 22

what are the secretion types?

Answer 22

sweat, sebaceous (oil), mammary (milk), ceruminous (wax)

Question 23

list four types of epidermal derivatives

Answer 23

hair, nails, sweat and sebaceous glands

Question 24

where are melanocytes found, and what is their function?

Answer 24

found in bottom layer of epidermis; produce melanin