Which one of the following is TRUE regarding skin?
A) Beneath the dermis is the basement membrane, which separates the dermis from the hypodermis.
B) Keratin is a protein in the cells of the epidermis that provides strength and waterproofing.
C) Melanocytes and keratinocytes are two skin cell types that are prevalent in the dermis.
D) The sebaceous glands and the sweat glands are two types of endocrine glands located in the dermis.
E) Melanocytes produce calcium, which strengthens the skin.
C
You might also like to view...
Select the pair in which the nitrogenous waste is INCORRECTLY matched with the benefit of its excretion.
A. urea: low toxicity relative to ammonia B. uric acid: can be stored and excreted as a precipitate C. ammonia: very soluble in water D. uric acid: minimal loss of water when excreted E. urea: very insoluble in water
Chthamalus stellatus and Semibalanus balanoides do not coexist in the same tidal zones because
A. S. balanoides outcompetes C. stellatus. B. C. stellatus outcompetes S. balanoides. C. S. balanoides preys on C. Stellatus. D. the two species require different resources. E. the two species require different resources and C. stellatus outcompetes S. balanoides.
When multiple color forms of an organism exist in a population, the least abundant form is likely to
increase in frequency.
Indicate whether the statement is true or false.The first stage in the development of the nervous system is
a. gastrulation. b. blastulation. c. neurulation. d. morulation. e. festination.