Part 4 How many sweat glands can you find? Materials: Over the counter iodine so
ID: 3521350 • Letter: P
Question
Part 4 How many sweat glands can you find? Materials: Over the counter iodine solution (can be purchased in any drug store) Cotton balls Clean white paper towels cut in 2 cm squares Procedure: You can estimate how many sweat glands you have on an area of skin by swabbing your skin with over the counter iodine solution, wipe the iodine over an area of skin, wipe off the excess, then take a clean, white paper towel square and apply the paper towel to the iodine swabbed area. Leave the towel on for 4 minutes. You should see small dark iodine spots on the paper towels that mark the sweat pores. Do this experiment on the four body parts listed in the table. Record the number of sweat glands per body part Table 2: Sweat Gland Distribution Body part Right forearm Right palm Right thigh Right sole of the foot Number of Sweat Glands per 2 em Do you see any differences in the area as far as the number of sweat glands? What do you think would happen if you had just finished exercising, would you be able to see more dots on the towels? Why?Explanation / Answer
Answer.
Right forearm has approx 29 sweat glands per cm2
Right palm has approx 75 sweat glands per cm2
Right thigh has approx 44 sweat glands per cm2
Right foot has approx 50 sweat glands per cm2
Yes, differences are observed in the number of sweat glands, there number is more on the right palm followed by right foot, because these body parts contain more eccrine sweat glands than right thigh and right forearm.
Yes, more dots are observed on the towel because eccrine glands are stimulated by exercising. Stimulation of sweat glands releases more sweat to release extra body heat. After a period of time, when this stimulation signal ends, sweat glands becomes inactive and body temperature becomes normal.