Wrinkles in elderly individuals are the result of
A) increased production of epidermis.
B) loss of elastic filaments in the reticular layer of the dermis.
C) increased keratinization of the epidermis.
D) the loss of glands and hair follicles from the skin.
E) decreased thickness of the dermis.
Answer: B
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The diagram illustrates accessory structures of the skin. What does "C" represent?
A. Eccrine sweat gland B. Sweat pore C. Sebaceous gland D. Hair follicle E. Duct of eccrine sweat gland
The smallest stable units of matter are
A) atoms. B) molecules. C) protons. D) neutrons. E) electrons.
In the renal tubules, where is the Na+/K+ pump located?
A) in both the apical and basolateral membranes of principal cells B) in the basolateral membrane of the proximal tubules C) in both the apical and basolateral membranes of intercalated cells D) in the apical membrane of the collecting ducts E) in the apical membrane of the descending limb of the loop of Henle
What do lysosomes contain?
A) metabolic enzymes that produce energy for the cell B) genetic blueprint for the cell C) ribosomes for protein production D) digestive enzymes E) actin proteins