Which of the following would be most useful for detecting the brain areas that are most active as a person performs mathematical calculations? a. a brain lesionb. an interneuronc. a pet scand. a hemispherectomy

The answer is; C

A PET scan is a positron emission tomography used to image the inside of the body. It involves the ingestion of a radioactive element. The element is actively absorbed by the tissue with active cellular activity hence these areas will show as bright spots when the body (this case the brain) is scanned.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.