Which of the following statements about salmonellosis is FALSE?
A) It is a bacterial infection.
B) Severity of disease depends on number of organisms ingested.
C) A healthy carrier state exists.
D) The mortality rate is high.
E) It is often associated with poultry products.
D
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What is the purpose of the watery fluid secreted by the serosa of the human digestive tract?
a. emulsifies fats b. initiates peristalsis c. kills bacteria d. neutralizes acidic conditions e. reduces friction between nearby organs
In a nerve cell, the function of the dendrites is to:
a. conduct impulses away from the cell body. b. attach the neuron to connective tissue. c. receive impulses and conduct them to the cell body. d. increase the speed at which nerve impulses are carried away from the cell body. e. support and nourish the neuron.
Blood flow and blood pressure are regulated by the amount of ________ released into the bloodstream.
A. hemoglobin B. carbonic anhydrase C. oxygen D. nitric oxide E. carbon dioxide
In a double-blind experiment, ________
A) the participants are unaware of whether they are in the experimental or control groups because of the use of placebos B) the researchers are unaware of which participants are in the experimental and control groups C) participants are randomly assigned to a control or experimental group D) All of the above are true.