Unit 5

Question 1

Which nail region describes the nail visible on the dorsal surface of the distal end of the digit?

Answer 1

Nail plate

Question 2

Which one of the following epidermal strata contains the most live cells?

Answer 2

Stratum basale

Question 3

At puberty, what type of hair grows in the area of the face (beard) in males, and in the genital region and axillary region of males and females?

Answer 3

Terminal hair

Question 4

The bulb portion of the dermal root sheath has what function?

Answer 4

Contains blood vessels to nourish hair growth

Question 5

If you perceive pain in the area just below your rib cage on the anterior or ventral surface, what body organ might be from where the pain arises?

Answer 5

Liver

Question 6

The active form of vitamin D is associated with the regulation of which one of the following ions?

Answer 6

Calcium

Question 7

What oily substances secreted onto skin help to prevent water from being absorbed into the skin and excessive evaporation of water from the skin?

Answer 7

Glycolipids

Question 8

What type of connective tissue forms the portion of the dermis just beneath the epidermis?

Answer 8

Areolar connective tissue

Question 9

During which phase in deep wound healing does hemostasis play a role?

Answer 9

Inflammatory phase

Question 10

Rarely, excess hair covers almost the entire body as a fur sometimes giving this condition the name, werewolf syndrome, but the medical name for this genetic condition is what?

Answer 10

Hypertrichosis

Question 11

Which one of the following best describes an injury requiring deep wound healing?

Answer 11

Dermis

Question 12

Which epidermal layer is lacking in hairy skin?

Answer 12

Stratum lucidum

Question 13

When our hands get sweaty during a tension-filled moment, which type of sweat gland is producing the excess sweat?

Answer 13

Merocrine gland

Question 14

Which one of the following types of glands contributes to thermoregulation?

Answer 14

Merocrine gland

Question 15

What type of sweat gland is activated by the sympathetic nervous system in response to hyperthermia?

Answer 15

Merocrine gland

Question 16

There appears to be a link between fingerprint patterns and certain genetic abnormalities such as Down’s syndrome. True or False?

Answer 16

True

Question 17

Which nail region is formed from the connective tissue underneath the nail which makes it thicker and stronger as the nail grows?

Answer 17

Nail bed

Question 18

The portion of the hair which is embedded deep in the dermis is called what?

Answer 18

Root

Question 19

The portion of the hair that is shaped like an onion deep in dermis where cell growth occurs is called what?

Answer 19

Bulb

Question 20

Which skin receptor is sensitive to touch, pressure and vibration?

Answer 20

Meissner’s corpuscles

Question 21

The sub-layer of the dermis which contains finger-like protrusions into the epidermis is called what?

Answer 21

Papillary region

Question 22

What is the name of the process which describes sweat absorbing heat and becoming vapor moving away from the skin?

Answer 22

Evaporation

Question 23

If vasodilation of peripheral blood vessels and sweating occurs, what condition below is indicated?

Answer 23

Hyperthermia

Question 24

The stratum basale layer of cells in the epidermis is also known by what other name due to its high level of cell division?

Answer 24

Stratum germinativum

Question 25

Which skin receptor is sensitive to touch and pressure?

Answer 25

Merkel discs

Question 26

Which one of the following is the most common type of cell in the epidermis?

Answer 26

Keratinocyte

Question 27

Keratinocyte death begins to occur in which epidermal layer?

Answer 27

Stratum granulosum

Question 28

What type of fiber(s) are found in the connective tissue forming the dermis?

Answer 28

Collagen and elastic fibers

Question 29

The very thin, unpigmented hair covering the fetus is called what?

Answer 29

Lanugo

Question 30

Identify the salty, acidic substance that is secreted onto the skin and helps inhibit microbial growth?

Answer 30

Sweat

Question 31

The active form of vitamin D is associated with the regulation of which one of the ions?

Answer 31

Calcium

Question 32

What is the name of the process which describes the transfer of heat when vasodilation of blood vessels near the skin transfers heat to the external atmosphere?

Answer 32

Conduction

Question 33

Fur in mammals is considered what type of hair?

Answer 33

Terminal hair

Question 34

Which region of the dermis is the largest region?

Answer 34

Reticular region

Question 35

The beginning of keratinocyte death and presence of keratohyalin and lamellar granules are indicative of keratinocytes in which epidermal layer?

Answer 35

Stratum granulosum

Question 36

The stage at which the cells in the hair matrix reduce their metabolic activity with hair falling out in several months is called what stage?

Answer 36

Telogen stage

Question 37

In hypothermia, what might one expect the arrector pili muscles in the skin to do?

Answer 37

Contract pulling hair up

Question 38

In thermoreception, the 'cold' receptors are located in the dermis of the skin. True or False?

Answer 38

False

Question 39

In thermoreception, the 'warm' receptors are located in the dermis of the skin. True or False?

Answer 39

True

Question 40

The skin is an organ composed of two tissue types, an epithelium and a connective tissue component. True or False?

Answer 40

True

Question 41

Cells involved in the healing of the epidermis are produced by cell division occurring in which one of the following epidermal strata?

Answer 41

Stratum basale

Question 42

In the region of the ear, modified sweat glands produce ear wax which is called what?

Answer 42

Cerumen

Question 43

The stage at which the cells in the hair matrix stop dividing is termed what stage?

Answer 43

Catagen stage

Question 44

Which one of the following best approximates the proportion of total heat loss which occurs through the skin?

Answer 44

80%

Question 45

Which one of the following best approximates the proportion of total body weight that is accounted for by the skin?

Answer 45

15%

Question 46

If you perceive pain in the area of skin located just below your sternum, from what organ might this pain be coming from?

Answer 46

Intestine

Question 47

Which epidermal cell layer consists of living keratinocytes held together by desmosomes?

Answer 47

Stratum spinosum

Question 48

Which nail region is formed from keratinocytes surrounding the nail root from which the nail grows?

Answer 48

Matrix