Examlex
If r is a positive number and the point (x, y) is in the indicated quadrant, decide whether the given ratio is positive or
negative.
-IV, xy
Endocrine System
The body system that helps regulate metabolic activities; consists of ductless glands and tissues that secrete hormones.
Nervous System
The system composed of neurons and their extensions that is responsible for sending signals throughout the body.
Second Messenger
Intracellular signaling molecules released by the cell to trigger physiological changes in response to external signals.
Hormone Mechanism
The method by which hormones act to regulate various bodily functions, involving synthesis, secretion, and cellular interaction.
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