Which of the following is NOT a property of water?
A. Solvent for polar and ionic compounds
B. Low heat of vaporization
C. Cohesiveness
D. High heat capacity
Answer: B
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Which of the following disorders is most deadly?
A. Psoriasis B. Squamous cell carcinoma C. Basal cell carcinoma D. Melanoma E. Acne
Answer the following statements true (T) or false (F)
1 A single layer of thin, flat cells that lines the heart and all blood vessels is called endothelium. 2 A single layer of thin, flat cells that lines the ventral body cavities is called mesothelium. 3 Multiple layers of cells, found where mechanical stresses are severe is called simple cuboidal epithelium. 4 Cuboidal cells resemble little hexagonal boxes, which appear square in typical sectional views. 5 Transitional cells are relatively tall, slender cells with nuclei in a narrow band close to the basement membrane.
A single, brief contraction and relaxation cycle in a muscle fiber is called a muscle __________.
A) cramp.
B) twitch.
C) tetanic contraction.
D) action potential.
E) motor unit.
When a protein permanently unfolds, it has been
a. polymerized. b. denatured. c. converted to nucleic acids. d. made more efficient.