A&P Chapter 5
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What layer germinates the epidermis?
What layer germinates the dermis and hypodermis?
Skin is well developed during the ___th month of gestation.
The downy coat is called ____ and is formed during the ____th of gestation.
lanugo; 5th and 6th
What encases the baby at birth?
Small white spots from sebaceous.
your skin is ____% of your weight
The 2 (3) distinct regions of the skin.
- 1. Epidermis
- 2. Dermis
- 3. (Hypodermis)
The epidermis is a _____ stratified squamous epithelium.
The majority of epidermal cells are ______ that produce ____.
These cells synthesize melanin.
These cells are associated with sensory nerve endings.
Microphages that help activate the immune system.
Exposure to ultraviolet (U/V) light causes the skin to darken by stimulating the production of...
The reticular layer accounts for ___% of the dermis.
Order of epidermis layers from surface to deep: stratum___
The skin that covers the palms, fingertips, and soles is considered ______ skin and consists of _____ layers.
In thin skin, the _____ layer is absent.
When you scratch your skin, what comes off as white flakes that are mostly cells from the stratum _____.
In skin, blood vessels are found in the _____
The toughened outer portion of the hair is termed the ___.
The structure that contracts to cause "goose bumps" is the____
arrector pili muscle
The central core of the hair is the ___.
Two types of glands found in the skin are the_______ and _______ glands.
Sudoriferous & Sebaceous
Sebaceous glands secrete _____.
Sudoriferous glands secrete _____.
Appendages of the skin:
- 1) hair
- 2) nails)
- 3) sudoriferous glands
- 4) sebaceous glands
The different layers of the epidermis have one feature in common. This feature is:
absence of blood vessels
Growth of the epidermis takes place because of mitosis in the ______.
The type of tissue making up the bulk of the dermis is ______.
dense connective tissue irregular
When assessing the extent of burns on the body using the rule of nines, the anterior and posterior trunk represents about what percentage of the body?
Glands usually associated with hair follicles are (could be two):
sebaceous glands & apocrine sweat glands
Which of the vitamin is “activated” in the skin?
In order to reduce an excessive body heat loss (there could be several):
- 1. production of sweat decreases
- 2. cutaneous blood vessels constrict
Functions of skin:
- 1. Expression
- 2. Protection
- 3. Temperature regulation
- 4. Vitamin D
- 5. Excretion
- 6. Sensory
- 7. Blood reservoir
Types of barriers of skin protection:
- 1. chemical
- 2. mechanical
- 3. biological
What is vellus?
peach fuzz (light, very fair body hair)
Nails are made up of hard ____ and have a ______, a _______, and a _____.
keratin; free edge; body; root
Length of anagen phase for hair growth on scalp.
What affects the growth and density of hair?
nutrition and genetics
What are the major problems resulting from burns?
infection & fluid loss
The degree of burn only affecting the epidermis
The degree of burn where disfigurement may occur.
Possible treatment for burns:
- IV nutrition & fluid replacement
- infection control
The least dangerous form of skin cancer.
Basal cell carcinoma
Type of skin cancer that can be lethal.
Squamous cell carcinoma
Skin cancer that arises from the melanocytes of a preexisting mole
How to identify malignant melanoma:
ABCDE (asymmetry, border is irregular, color is mixed, diameter over 6mm, elevation)
Yellow to orange pigment
Polymer ranging in color from yellow to red/brown to black
Gives pinkish hue to skin
cyanosis is ____ color
erythema is ____ color
jaundice is _____ color
bronzing is ____ color
pallor is ____ color
black and blue marks
Finger prints are what type of skin marking?
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