Refer to the figure showing the adrenal gland. 
Which structure directly responds to adrenocorticotropic hormone, and what is the response?
Definitions:
Correlation (r)
A statistical measure that indicates the extent to which two or more variables fluctuate together.
Graduate Research Project
An extensive study typically undertaken by a student at the graduate level, involving original research or a comprehensive review of existing research on a specific topic.
Randomly Selects
A process of choosing items or individuals without a specific pattern, order, or preference, ensuring equal chance of selection.
Longitudinal Study
A research design that involves repeated observations of the same variables (e.g., individuals) over short or long periods of time, often many years.
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