[Article in German] BÃ¶hm M. Adenosine has a negative inotropic effect in cardiac atrial preparations (direct negative inotropic effect). This effect is probably due to an activation of a potassium outward current which shortens the action potential duration and hence reduces the force of contraction.
A scatterplot is a graph that is used to plot the data points for two variables. Each scatterplot has a horizontal axis (x-axis) and a vertical axis (y-axis). One variable is plotted on each axis.
Graphs often make it easier to see relationships between the variables you are studying. There are many types of graphs, but the one you will use most often in this class is a simple scatter diagram. To make a scatter diagram, begin by drawing the axes for the graph on a sheet of graph paper.