Haemophilus influenzae is a common cause of which of the following?
A. influenza
B. dysentery
C. upper respiratory tract infection
D. hemophilia
Ans: C. upper respiratory tract infection
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Enteric bacteria such as Salmonella spp., Shigella spp., and Escherichia spp. most often contaminate and spoil
A) meat. B) fruits. C) grains. D) milk and milk products.
The organism that causes malaria is
a. a pathogen. b. Plasmodium vivax. c. carried by a mosquito. d. all of the above.
Members of the ____ lineage are highly active, have a closed circulatory system, and a high oxygen requirement
a. Cephalopoda b. Polyplacophora c. Platyhelminthes d. Gastropoda
e. ScaphopodaWhich of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Some sensory receptors do not convert a stimulus to nerve impulses. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.