The sodium chloride molecule breaks apart in water. What does "A" represent?
A. Salt crystal
B. Sodium ion
C. Water molecule
D. Dissociation
E. Chloride ion
Answer: A
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A laboratory rat has an electrode implanted in its brain. By pressing a metal bar in its cage, the animal can activate the electrode. You are analyzing the data from the most recent experiment day and find that the rat pressed the bar over and over again. The rat did not even eat during the experimental period because it was too busy pressing the bar. In which location is the electrode likely to be implanted?
A. Occipital lobe B. Frontal lobe C. Hypothalamus D. Mesolimbic system E. All of the choices are possible locations of the electrode.
Contraction of the circular smooth muscle in the gastrointestinal tract wall decreases the diameter of the lumen, while contraction of the longitudinal smooth muscle shortens the tract.
Answer the following statement true (T) or false (F)
Which structures connect one gyrus to another within the same cerebral hemisphere?
A. Association tracts B. Projection tracts C. Commissural tracts D. Spinothalamic tracts E. Corticospinal tracts
The hormone that stimulates the production of testosterone is __________ hormone.
Fill in the blank(s) with the appropriate word(s).