The oval window is indicated by
a. A.
b. B.
c. D.
d. E.
e. F.
Answer: c
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Most phyla of aquatic invertebrates have improved the rate of gas exchange by creating a water current over their respiratory surfaces, thereby _____.
A. changing the diffusion constant B. increasing the surface area for diffusion C. decreasing the distance for diffusion D. increasing the concentration difference
Cilia differ from flagella in that
A) cilia contain nine microtubule doublets surrounding a central pair of microtubules, whereas flagella contain only nine microtubule doublets. B) the protein filaments of cilia are "naked," whereas those of flagella are wrapped in an extension of the cell membrane. C) cilia are typically more numerous and shorter than flagella. D) cilia are anchored only in the proteins of the cell membrane, whereas flagella are anchored in a special structure called the basal body.
Which of the following antimicrobial agents is the most toxic to humans?
A. 70% alcohol B. ethylene oxide C. quaternary ammonium compounds D. chloramines E. iodophors
T or F: the physiologic cross section of a fusiform muscle is the same as the anatomical cross section
What will be an ideal response?