Exam 2 Slide Show Integumentary (pt2)

Question 1

Keratinocytes have intermediate filaments called ______ composed of a protein that will later form keratin

Answer 1

tonofilaments

Question 2

Which cell of the stratum basale continuously undergoes mitosis?

Answer 2

Keratinocytes

Question 3

What is the stratum spinosum comprised of?

Answer 3

8-10 layers of keratinocytes; few Langerhans cells

Question 4

Why does the stratum spinosum look spiny after preparation for microscopy?

Answer 4

There are desmosomes attached by tonofilaments

Question 5

Because cells of the stratum spinosum may undergo mitosis, the term _________ is sometimes applied to the combination of stratum basale and stratum spinosum

Answer 5

stratum germinativum

Question 6

What is the stratum granulosum comprised of?

Answer 6

3-5 layers of flattened keratinocytes

Question 7

Older cells undergo ______ in the stratum granulosum and die

Answer 7

Apoptosis

Question 8

In the stratum granulosum, ________ release a waterproofing lipid solution

Answer 8

lamellar granules

Question 9

Which epidermal layer is the transition between the deeper living cells and the more superficial dead cells

Answer 9

Stratum granulosum

Question 10

Which layer of the epidermis has 3-layers of flattened, dead keratinocytes filled with keratin?

Answer 10

Stratum lucidum

Question 11

Which layer of the epidermis is where cells are continuously sloughed off and replaced by cells from deeper strata?

Answer 11

Stratum Corneum

Question 12

The stratum corneum is comprised of how many layers of flattened, dead cells?

Answer 12

25 - 30

Question 13

What type of tissues is the dermis comprised of?

Answer 13

Dense irregular connective tissue; collagen and elastic connective tissue

Question 14

This cell forms in the stratum basale where mitosis begins

Answer 14

Kertainocytes

Question 15

What cell structure enables the migration of langerhans cells?

Answer 15

Microfilaments

Question 16

Microfilaments are made of what?

Answer 16

Actin

Question 17

Which cell is most numerous? Merkel cells or kerationcytes?

Answer 17

Keratinocytes

Question 18

Which layer of the epidermis has the most layers of cells?

Answer 18

Stratum corneum

Question 19

How many lbs do we lose in a life time because of dead cells?

Answer 19

35 - 40 lbs

Question 20

The Dermis is divided into what two components based on structure?

Answer 20

Papillary region (more superficial)

Reticular region (deeper)

Question 21

What adds better adhesion to the epidermis and more surface area for diffusion to and from the epidermis?

Answer 21

Dermal papillae

Question 22

Meissner corpuscles (touch corpuscles) are located where?

Answer 22

In the papillary region of the dermis

Question 23

Free nerve endings with no apparent structural specialization, give rise to what sensations?

Answer 23

Warmth, Coldness, Pain, Tickle, and Itch

Question 24

What provides the reticular region of the dermis with strength, extensibility, and elasticity?

Answer 24

The combination of collagen and elastic fibers.

Question 25

The subcutaneous layer is comprised of what?

Answer 25

Areolar and adipose tissues