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Exercise 7: The Integumentary System

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created 3 years ago by jncanf
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pg. 101 - pg. 104

updated 3 years ago by jncanf

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1

The two basic tissues of which the skin is composed are dense connective tissue, which makes up the dermis, and __1__, which forms the epidermis.
Most cells of the epidermis are __2__. The protein __3__ makes the dermis tough and leather like. The specialized cells that produce the pigments that
contribute to skin color are called __4__.

1. stratified squamous epithelium
2. Keratinocytes
3. Keratin
4. Melanocytes

2

Four protective functions of the skin are?

1. prevents desiccation
2. prevents bacterial invasion
3. protects against thermal damage
4. protects against UV radiation.

3

translucent cells in thick skin containing keratin fibrils

stratum lucidum

4

dead cells

stratum corneum and stratum lucidum

5

dermal layer responsible for finger prints

papilliary layer

6

vascular region

dermis as a whole

7

major skin area that produces derivatives(nails and hair)

epidermis as a whole

8

epidermal area exhibiting the most rapid cell division

stratum basale

9

scalelike dead cells, full of keratin, constantly slough off

stratum corneum

10

mitotic cells filled with intermediate filaments

stratum spinosum

11

has abundant elastic and collagenic fibers

dermis as a whole

12

location of melanocytes and tactile (merkle) cells

stratum basale

13

area where weblike pre-keratin filaments first appear

stratum spinosum

14

region of areolar connective tissue

papillary layer

15

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**************pics***************

16

_____________ granules extruded from the keratinocytes prevent water loss by diffusion through the epidermis

laminated

17

fibers in the dermis are produced by ______________.

fibroblasts

18

glands that respond to rising androgen levels are the ____________________ glands.

sebaceous and apocrine glands

19

phagocytic cells that occupy the epidermis are called _____________________________.

epidermal dendritic or langerhans cells

20

a unique touch receptor formed from a stratum basale cell and a nerve fiber is a __________________.

tactile or Merkel disc

21

What layer is present in the thick skin but not in thin skin?

stratum lucidum

22

What cell-to-cell structure holds the cells of the stratum spinosum tightly together?

desmosomes

23

What substance is manufactured in the skin that plays a role in calcium absorption elsewhere in the body?

vitamin D3

24

List the sensory receptors found in the dermis of the skin:

free nerve endings for pain, temperature, messiners corpuscles for touch in the hairless skin, pacinian corpuscles for pressure

25

A nurse tells a doctor that a patient is cyanotic. Define cyanotic.

A blue cast to the skin

26

What does cyanotic presence imply?

Inadequate oxygenation of the blood

27

What is a bedsore (decubitus ulcer)?

localized area of tissue necrosis and death

28

Why do ulcers occur?

pressure areas point of increased pressure over bony areas restrict the blood supply to the area

29

Produces an accumulation of oily material that is known as a blackhead

sebaceous glands

30

Tiny muscles, attached to hair folicles, that pull the hair upright during fright or cold

arrector pili

31

Perspiration glands with a role in temperature control

sweat gland---eccrine

32

Sheath formed of both epithelial and connective tissues

hair follicle

33

Less numerous type of perspiration-prouducing gland; found mainly in the pubic and axillary regions

sweat gland--apocrine

34

Found everywhere on the body except the palms of hands and soles of the feet

sebaceous glands

35

Primarily dead/keratinized cells

nail and hair

36

Specialized nerve ending that respond to temperature, touch, etc.

cutaneous receptors

37

Secretes a lubricant for hair and skin

sebaceous glands

38

"sports" a lunule and cuticle

nail

39

Describe two integumentary system mechanisms that help in regulating body temperature:

1. When capillary blood dlow to the skin and enhanced by nervous system controls, heat radiates from the skin surface; restriction of blood flow conserves body heat.
2. Activity of sweat glands i.e., when perspiration evaporates from the skin surface, heat is lost.

40

******************************

********pic*******************

41

With what substance in the bond paper does the iodine painted on the skin react?

The starch

42

Based on class data, which skin area--the forearm or palm of hand--has more sweat glands?

Palm

43

Which other body areas would if tested prove to have a high density of sweat glands?

Face and Axillae

44

What organ system controls the activity of the eccrine sweat glands?

Nervous system

45

Why can fignerprints be used to identify individuals?

The pattern of your epidermal ridges is unique and does not change during your lifetime. Everyones fingerprint was made different, therefore this is a useful way for people to identify one another.

46

Name the three common fingerprint patterns:

Loops, Arches and Whorls