What are melanocytes and what do they do to the skin

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

The relationship between intron and exon

Which of these chinese regions is the most densely populated?