Why are "henna tattoos" of the epidermis not permanent like other tattoos?
A) Regular tattoos inject their ink into the mitotic epidermal cells making the dye permanent.
B) The epidermis's dendritic cells phagocytize/remove the henna stain.
C) The epidermis is continually renewing its keratinocytes and sloughing off the old cells.
D) The henna stain is water soluble and excreted with sweat as a by-product.
Answer: C
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Olfactory cells and taste buds are normally stimulated by ________
A) stretching of the receptor cells B) movement of a cupula C) substances in solution D) the movement of otoliths
Answer the following statements true (T) or false (F)
1. Lymph always flows away from the heart. 2. Lymphatic capillaries are permeable to proteins. 3. Digested fats are absorbed from the intestine by the lymph capillaries 4. Chyle is delivered to the blood via the lymphatic system. 5. About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to the bloodstream as lymph.
Preganglionic parasympathetic fibers synapse on neurons of ________ ganglia.
Fill in the blank(s) with the appropriate word(s).
Most of the skin is ________ mm thick.
A. 0.01 to 0.02 B. 1 to 2 C. 0.1 to 0.2 D. 10 to 20 E. 100 to 200