Viral replication occurs
A) intracellularly.
B) extracellularly.
C) both intracellularly and extracellularly.
D) either intracellularly or extracellularly, depending on the virus involved.
Answer: A
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Algae can reproduce both sexually and asexually
Indicate whether the statement is true or false
Direct antigen testing differs from direct fluorescence testing in that the results
A. require specialized equipment. B. are less accurate. C. are more accurate. D. require an electron microscope. E. are read with the naked eye.
With negative pressure breathing, the muscles that move the ribs and diaphragm are distant from the absorptive alveolar surfaces. What difficulty(ies) could occur if the muscles were around each alveolus and had to expand each alveolus to suck in air?
A. Interspersed muscle tissue would take up much space and the lung-muscle volume would have to be much larger. B. Adding a third tissue to the intimate alveolar-capillary complex would increase the problems with disorders and diseases. C. Muscle tissue would get in the way of absorption of gases across the air-to-capillary border. D. Since muscle cells only contract and relax, it would be difficult for a few cells to cause alveolar expansion. E. All of the choices are correct.
Figure 35.9B
The following question refers to the figure above of a section through bone.
DA blood vessel is indicated by the letter ____.
A. A B. B C. C D. D E. E