A substance that released by an organ or tissue in the body is called
A substance released by an organ or tissue in the body is typically referred to as a secretion. When these substances are released into the bloodstream to act on distant organs or tissues, they are specifically known as hormones. There are several other terms that might also apply, depending on the context and the nature of the substance released:
1. **Hormone**: A chemical messenger secreted by glands that travels through the bloodstream to regulate the function of distant cells or organs.
2. **Enzyme**: Biological catalysts produced by living organisms that speed up chemical reactions within the body, often released into the digestive tract or other sites of action.
3. **Neurotransmitter**: Chemical messengers that transmit signals across a chemical synapse, such as between a neuron and a target cell (another neuron, muscle cell, or gland cell).
4. **Cytokine**: A broad category of small proteins important in cell signaling, usually released by immune cells to communicate with other cells and coordinate an immune response.
5. **Exocrine secretion**: A substance released by exocrine glands through ducts to the surface of an organ or tissue or into a body cavity. Examples include sweat, saliva, or digestive enzymes.
The term you use would depend on the specific function and destination of the substance in question.
Simple answer
A substance released by an organ or tissue in the body is called a secretion.
Wrong
I apologize for any confusion. If you're referring specifically to substances released into the bloodstream that affect other parts of the body, they are called hormones. If you're looking for a more general term that includes all types of substances, including those not secreted into the bloodstream, the term could vary. For instance, neurotransmitters are released by neurons, cytokines by immune cells, and enzymes can be released by a variety of cells.
If none of these terms are what you're looking for, please provide additional context, and I would be happy to assist you further.