Lesson 1B Lab Help Save & ExitSubmit How the Skin Functions Read the overview an

Question

Lesson 1B Lab Help Save & ExitSubmit How the Skin Functions Read the overview and complete the interactivities that follow Nick and Kate are going on a morning run. As you read the following scenario and answer the questions that follow, consider the different functions of the skin. Case Study: Functions of the Skin dRead the scenario below and answer the questions to the right. Nick and Kate are outside running on a cool, sunny morning. If it is extra cool out, their skin may get paler as the dermal blood vessels constrict to preserve heat for the body's core. As they continue to run, their muscles generate heat and they will notice that their skin is becoming redder. The dermal blood vessels are now dilating, and increasing blood flow to the skin, which gives it more color. The increased blood flow radiates off some of the excess heat to keep tha body's core from getting too warm. if this effort is not sufficient to remove the excess heat, the brain will trigger sweating. Here, fluid (not blood cells) leaks from the dilated blood vessels. Sweat glands take in this fluid, process it, and deliver it to the skin's surface as sweat to start evaporative cooling. This will further reduce body temperature cos 1. Describe two ways the skin protects Nick and Kate as they are on theilr run

Explanation / Answer

1.skin belongs to integumentary system and the function of integumentary system is to protect the body by maintaining temperature inside according to the temperature outside.

2.UV light is harmful to the skin as it increases the chance of melanoma a type of skin cancer.

3. Temperature regulation is done by the glands under the skin secrete sweat onto the surface of the skin in order to increase heat loss by evaporation if the body is too hot and the second way is hairs over the skin absorb more heat when they are standing up and less when they lie flat.

4.if they do not protect their skin from the sun, immediate damage will be sunburn and tanning due to overexposure to the sun.

5.Long-term exposure can cause early skin aging, wrinkles, loss of skin elasticity, dark patches (lentigos, sometimes called age spots or liver spots), and pre-cancerous skin changes (such as dry, scaly, rough patches called actinic keratoses).

Multiple choice questions-

1. Redness,swelling and pain

2.epidermis

3.water retention

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