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Penguins Sleep and Wake Thousands of Times a Day — Biological Strategy — AskNature

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Cells are the basic building blocks of all living systems, so cellular processes dictate how physiological processes occur within those systems. Cells (whether entire unicellular organisms or parts of multicellular living systems) grow, metabolize nutrients (that is, chemically transform them), produce proteins and enzymes, replicate, and move. Cells as part of multicellular systems rarely act alone, instead having ways to signal to start and complete simple to quite complex interactions. How skin heals is a good example of the role of cellular processes. Blood cells called platelets release clotting factors to stop the bleeding; white blood cells rid the area of foreign materials and release molecules to coordinate healing; cells called fibroblasts start rebuilding using proteins called collagen; new blood vessels form; and skin cells called keratinocytes create the new surface. When a living system is in homeostasis, it means that internal conditions are stable and relatively constan

Penguins Sleep and Wake Thousands of Times a Day — Biological Strategy — AskNature Biological Strategy Penguins Sleep and Wake Thousands of Times a Day Chinstrap penguin AskNature Team Functions Performed More from this Living System Regulate Cellular Processes Cells are the basic building blocks of all living systems, so cellular processes dictate how physiological processes occur within those systems. Cells (whether entire unicellular organisms or parts of multicellular living systems) grow, metabolize nutrients (that is, chemically transform them), produce proteins and enzymes, replicate, a

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