Skin Notecards
Order by
28 terms
Terms | Definitions |
|---|---|
 During physical activity active muscles release__ which the blood carries away | heat |
| When warmed blood reaches the hypothalmus what happens | muscles in the walls of dermal blood vessels relax |
| As dermal blood vessels dilate heat escapes adonde | outside world |
| Skinn reddens because | dermal blood vessels become dilated |
| The primary means of body heat loss is | radiation |
| ___is the spread of heat from warm areas to cool areas | radiation |
| ________is the movement of heat into molecules of cooler objects | Conduction |
| _____is the continuous circulation of air over a warm surface | Convection |
| _____is the change of a liquid into a gas | Evaporation |
| When sweat evaporates it carries what away from where? | Heat form skin surface |
| When body temperature falls below the set point, what do the muscles of dermal blood vessels do? which doesss what | constrict which decreases the flow of blood through the skin |
| When body temperature fallls what becomes inactive? If this continues what happens? | Sweat glands. small groups of muscles contract slightly to produce shivering |
| Increase in body temperature | Hyperthermia |
| If air temperature is high, heat lost by radiation is a. more effective b. less effective | less |
| Decrease in body temperature | hypothermia |
| Hypothermia can result from | proloneed exposure to cold or an illness |
| Hypothermia can LEAD to | confusion, lethargy and loss of consiousness. |
| Who is at a higher risk for developing hypothermia | Children and Elderly |
| Does racial origin have an effect on the number of melanocytes in their skin ? | no |
| Differences in skin color result from what | the differenced in the amount of melanin that the melanocytes produce. |
| The more melanin produced the ___skin | darker |
| What is the second thing that influences skin color | the distribution and size of pigmentss granules within melanocytes |
| Enviornmental factors such as _____ and ____ affect skin color | sunligh and x-rays |
| HOW do envionmental factors influence your skin color? | these factors stimulate melanocytes to produce more pigment |
| WHen do tans fade? | When pigmented epidermal cels become keratinized and wear away |
| when does the blood pigment hemoglobin brighten? (skin of lighter complexioned people appears pink) | When blood is well oxygenated |
| What happens when blood oxygen concentration is low? | Hemoglobin is dark red and the skin appears bluish |
| If dermal blood vessels are dilated, what happens | more blood enters skin and skin appears pinkish of reddish |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.