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Chapter 6
Integumentary System
| Question | Answer |
|---|---|
| Which layer of the epidermis is made up of cells that are constantly dividing? | Stratum basale |
| If you look at your skin on your arm, the layer of the epidermis you are seeing is the?…It also contains dead keratinized cells. | Stratum corneum |
| What layer of skin produces melanin? | Epidermis |
| Melanocyte is a type of cell that produces ________ within our skin. | Color |
| The waterproofing protein that fills the cells in the upper layers of the epidermis? | Keratin |
| What are the cells that produce keratin? | Keratinocyte |
| What cells are responsible for light touch? | Merkel cells |
| What is the one thing that identical twins do not share, and why? | Because the fingerprint pattern changes slightly as a fetus presses the forming ridges against the uterine wall; and since not two fetuses move exactly in the same ways, their fingerprints are not exactly alike. |
| It is the thickest layer of the skin | Dermis |
| What layer of the epidermis is primarily found on the palms and soles? | Stratum lucidum |
| What layer of the skin is avascular? | Epidermis |
| What layer of the skin contains sweat glands? | Dermis |
| What layer of the dermis is responsible for providing nutrients to the epidermis? | Papillary layer |
| What it the structure of the dermis called that supplies nutrients for the epidermis? | Dermal papillae |
| Subcutaneous layer is also know as the what layer? HINT: Means below the dermis | Hypodermis |
| What factors determine skin color? | Melanin, genetics, environmental and physiological factors |
| What is responsible for the differences in skin color? | amount of melanin, and the distribution and size of pigment granules. |
| What is the rule used to check for melanomas? | ABCDE |
| Is it necessary that we spend time in the outside in the sun? Why? | Yes; for the activation of Vitamin D |
| The nail consists of what three parts? | Nail plate, nail bed, and lunula |
| The hair follicle is found in what layer of the skin? | Dermis |
| Hair is found on all skin surfaces except? | Palms, soles, lips, nipples, and parts of the external reproductive organs |
| How is hair color determine? | Genes |
| Why are people with albinism so light skinned? | They lack melanin production |
| What part of the nail is where epithelial cells divide, and newly formed cells become keratinized? | Lunula |
| Why is body temperature regulation so important? | Because even slight changes can disrupt the rate of metabolic reactions |
| What are the four ways we lose heat? | Conduction, convection, radiation, and evaporation |
| The body loses heat through physical contact by means of ? HINT: Most common way | Conduction |
| What happens when your body temp rises? | The brain detects a change, sends signal to release heat causing you to sweat and the blood vessels to dilate |
| What happens when your body temp drops? | Blood vessels contract to reduce heat loss, muscles contract, and cause you to shiver and have goose bumps. |
| What muscle is responsible for causing goose bumps? HINT: Attached to the hair follicle | Arrector pili muscle |
| What are the functions of the skin? | Protect, Temp regulation, Water barrier, Produce vitamin D, Excretion |
| What is the role of vitamin D? | Necessary for normal bone and tooth development |
| Where does inactive vitamin D become active vitamin D? | Liver and kidneys |
| What glands excrete waste from the skin? | Sebaceous and sudoriferous glands |
| Is the subcutaneous layer a true layer of the skin? | NO |
| What layer of the epidermis is where keratinization (cells die) takes place? | Stratum granulosum |
Created by:
MSTBB1
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