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What directly causes the release of energy in the human body for muscular work (contraction)?

What structures make up the central nervous system?

The largest muscle of the posterior pelvis is the: 

Which of the following is FALSE regarding skeletal muscle characteristics?

What bone attaches to the radius at its proximal end?

A researcher gives her subjects a caffeine pill prior to performing a running routine to evaluate the effects of caffeine on heart rate during the workout. What is the independent variable in this study?

Planned, structured, and repetitive bodily movement done to improve and/or maintain one or more components of physical fitness is called:

Exercise testing for healthy and diseased populations is studied under what core area of study in Exercise Science?

This have brought about additional health regulations and licensure requirements. 

The image below shows an 8-puzzle game where you must transform the given scrambled configuration into the correct placement.  We now need to use A* search to find the optimal game strategy, i.e., to complete the game in the fewest steps possible. In A* search, we must define a heuristic function to compute the heuristic at each step. Therefore, please write the pseudocode to calculate the heuristic at each step(not the pseudocode for A* search, but only the portion that calculates the heuristic). You are free to choose the heuristic function, and you can decide what the input of this function is. Note that the heuristic function must be one we discussed in class, and you should indicate the one you chose at the beginning of your solution.