Examlex
Suppose you want to test the effects of handing out free samples of pizza on the sales of frozen pizza in supermarkets. For one week, you provide free samples in a "test" supermarket located in one area and do not provide free samples in a "control" supermarket located in another area. During this period a pizzeria located in the test area goes out of business. If you found that pizza sales increased in the test store but not in the control store, what is a likely alternative explanation to the effect of providing free hot pizza?
Phrenic Nerves
Nerves that originate in the neck and pass down between the lung and heart to reach the diaphragm, crucial for breathing.
Levator Scapulae
A muscle in the back and neck that elevates the scapula (shoulder blade).
Retract
To draw back or in, often referring to the withdrawal of a statement or pulling a part of the body away from an anterior position.
Elevate
To lift something up or to raise to a higher position or level.
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