Which of the following effects of aging is most vital to a person living in a hot, humid climate?
A) a decrease in melanocyte activity
B) thinning of the epidermis of the skin
C) a decrease in the number of Langerhans' cells
D) a decrease in glandular activity
E) All of the answers are correct.
D) a decrease in glandular activity
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When a small amount of HCl or NaOH is added to a solution of Na2HPO4, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na2HPO4, except
A) Na2HPO4 is able to accept extra hydrogen ions from the HCl. B) Na2HPO4 is able to donate hydrogen ions to the OH- from NaOH. C) Na2HPO4 adsorbs excess H+ and OH- directly onto the surface of its crystalline structure. D) Na2HPO4 is a salt formed from reacting a strong base with a weak acid. E) Na2HPO4 acts as a buffer.
Which of these is not normally found in blood?
A. Fibrinogen B. Antibodies C. Glucose D. Albumin E. Glycogen
Circular folds (plicae circulares) are characteristic of which of the following structures?
(A) transverse colon (B) stomach (C) jejunum (D) cecum (E) sigmoid
____________________ immunity is conferred by receipt of preformed antibodies
Fill in the blank(s) with correct word