10) Tom and Jesse decided to perform an experiment to see what exercise does to blood pressure. They decided to test their friend John. Below is their procedure.

1. Take test subject's resting blood pressure.
2. Have test subject do either sit ups, push ups, or sprint for one minute.
3. Take test subject's blood pressure.

Tom and Jesse run the same tests on John every day for one week. Running the same test, for one week, is an example of

The correct answer is repetition.  

Explanation:

When the same test is run for multiple times and have multiple trails is repeated at least three times for a longer period like one week, this is known as repetition.

At the time of an experiment or investigation in a scientific setting and if there are various sets of measurements are performed again and again. Tom and Jesse performing tests is an example of repetition.

Thus, the correct answer is repetition.  

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.