Legionellosis is a Zoonosis
a. true
b. false
b. false
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In order to have a positive charge, an atom must have ________
A) more protons than electrons B) more electrons than protons C) more neutrons than protons D) more protons than neutrons
Which of the following will increase the speed of an action potential moving down an axon? I) Action potentials move faster in larger diameter axons. II) Action potentials move faster in axons lacking potassium ion channels
III) Action potentials move faster in myelinated axons. A) only I and II B) only II and III C) only I and III D) I, II, and III
Scarlet fever is a clinical manifestation of streptococcus pyogenes infection. The skin rash is caused by
A. Erythrogenic toxin B. Streptolysin S C. Streptolysin O D. Streptokinase E. Exfoliative toxin A-G
Which of the following shows the steps of a viral infection in the proper order?
A) virus locates host cell ? enters nucleus ? alters host cell DNA ? destroys cell membrane B) virus locates host cell ? alters host cell DNA ? host cell produces copies of virus ? copies enter host cell nucleus ? nucleus leaves cell C) virus locates host cell ? penetrates cell membrane ? enters nucleus ? alters host cell DNA ? host cell produces copies of virus D) virus locates host cell ? forms hydrogen bonds ? changes DNA to RNA? host cell produces copies of virus