Which of the following may result from eating tuna sashimi (raw fish)?
A) botulism
B) norovirus infection
C) polio
D) salmonellosis
E) saxitoxin intoxication
E
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What effect does the nervous system have on the heart rate?
A. Stimulation by parasympathetic nerves causes the heart rate to slow down. B. Stimulation by sympathetic nerves sets the resting heart rate of the pacemaker cells in the SA node. C. Stimulation by sympathetic nerves causes the pacemaker cells of the AV node to depolarize more rapidly than the pacemaker cells of the SA node. D. Stimulation by either the sympathetic or parasympathetic nerves causes pacemaker cells in the SA node to depolarize more slowly. E. The nervous system does not directly affect the heart rate.
Primary tissue layers form by cell divisions, cell
migrations, and rearrangements at this stage. a. A b. B c. C d. D e. E
Which of the following is created as ions diffuse across membranes?
a. an electrical gradient b. an electrochemical gradient c. a chemical gradient d. a biochemical gradient
List and explain the six steps in the hydrological cycle.
What will be an ideal response?