Question

1. what are papillae? how do they provide a method of identification? 3. what is the proper name for sweat glands? name three (3) substances found in perspiration. 4. what is the proper name for oil glands? what are the functions of oil glands? 5. what is alopecia? 6. list seven (7) functions of the skin. 7. what happens when blood vessels dilate? how does this regulate temperature? what happens when blood vessels constrict? how does this regulate temperature? 8. define the following words, and give one cause for each discoloration. a. erythema: b. jaundice: c. cyanosis:

Explanation:

1. Papillae are small, nipple - like projections. On the skin, they contribute to fingerprint patterns which are unique to each individual for identification.
2. The proper name for sweat glands is sudoriferous glands. Substances in perspiration include water, salt, and urea.
3. The proper name for oil glands is sebaceous glands. Their functions include lubricating the skin and hair, and preventing drying.
4. Alopecia is the medical term for hair loss, which can be due to various factors like hormonal changes or autoimmune disorders.
5. Functions of the skin include protection, sensation, temperature regulation, vitamin D synthesis, excretion, absorption, and storage.
6. When blood vessels dilate, more blood flows to the skin surface, releasing heat to cool the body. When blood vessels constrict, less blood reaches the skin surface, conserving heat.
7. a. Erythema is redness of the skin, often caused by increased blood flow due to inflammation.

b. Jaundice is a yellowing of the skin and sclera, usually caused by liver problems leading to bilirubin accumulation.
c. Cyanosis is a bluish - discoloration of the skin, often due to poor oxygenation of the blood.

Answer:

1. Papillae are small projections. Fingerprint patterns from skin papillae are unique for identification.
2. Sudoriferous glands. Water, salt, urea.
3. Sebaceous glands. Lubricate skin and hair, prevent drying.
4. Hair loss, can be due to hormonal changes etc.
5. Protection, sensation, temperature regulation, vitamin D synthesis, excretion, absorption, storage.
6. More blood to skin surface, cools body. Less blood to skin surface, conserves heat.
7. a. Redness of skin, inflammation - related increased blood flow.

b. Yellowing of skin/sclera, liver - related bilirubin accumulation.
c. Bluish skin discoloration, poor blood oxygenation.