Examlex
What is the name of the device placed just under the skin in the arm that uses time-released hormones to prevent pregnancy for up to three years?
Signaling Molecules
Chemicals released by cells that communicate and coordinate actions across the body or between organisms, crucial in many biological processes.
Histamine
A compound released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries.
Prostaglandins
A group of physiologically active lipid compounds that have diverse hormone-like effects in animals.
Sensory Stimulus
An external or internal event or factor that initiates a sensory response in an organism, leading to a potential change in behavior or physiological state.
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