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Explore AP Biology with Khan Academy's videos, articles, and practice questions to master biochemistry, cell biology, genetics, evolution, and ecology.
Introduction to cell signaling (article) | Khan Academy
Learn how cells communicate with one another using different kinds of short- and long-range signaling in our bodies.
Cell signaling - Khan Academy
Cell-cell signaling in unicellular organisms (Opens a modal) Communication in multicellular organisms. Learn. Cellular communication (Opens a modal) Cellular mechanism of hormone …
Cellular communication - Khan Academy
Cell communication is crucial for complex organisms. Cells can communicate directly through contact or indirectly via chemical signaling. This communication can occur over short …
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To divide, a cell must complete several important tasks: it must grow, copy its genetic material (DNA), and physically split into two daughter cells. Cells perform these tasks in an organized, …
Cell-cell signaling in unicellular organisms - Khan Academy
In multicellular organisms (such as yourself), cell-cell signaling allows cells to coordinate their activities, ensuring that tissues, organs, and organ systems function correctly. Does that mean …
Homeostasis - Khan Academy
2016年6月18日 · After you eat a meal, your blood glucose levels rise, triggering the secretion of insulin from β cells in the pancreas. Insulin acts as a signal that triggers cells of the body, such …
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Yes, autocrine hormones act on the cells that created them, whereas paracrine can work on cells that are nearby, and endocrine can travel a long distance to act on a cell. For example, some …
The synapse (article) | Human biology | Khan Academy
Explore the synapse, the junction between neurons, and learn about its role in transmitting signals in the nervous system.
Unit 4: Cell communication and cell cycle - Khan Academy
Prepare to dive deep into the inner workings of cells! In this unit, you'll learn about how cells communicate with one another, how cells divide, and how problems can arise when these …