Nutrient

"...systems - form the vocabulary for everything that follows. Book 2: Resource Dynamics How organisms acquire, allocate, and use resources. Energy, nutrients, attention, capital, talent - it's all the same game. You'll learn why startups and elephants can't use the same resource strategy, how to diagnose m..."

"But the cell can't just open the gates and let everything in. It needs specific transport mechanisms for each nutrient type. Some nutrients are common and valuable (glucose), so cells invest in pumps that actively concentrate them inside even when external concentrat..."

"...nutrients delivered through the bloodstream (a surface area problem - capillary walls have area, blood flow is distributed). But the organism's total nutrient demand is volume-based. Larger animals need proportionally more complex circulatory systems just to keep cells fed. This is why blue whales have hea..."

"...pression is regulated by transcription factors - proteins that bind to DNA and turn genes "on" or "off." Environmental signals - temperature, light, nutrients, chemicals, stress - affect which transcription factors are active. This changes which genes get expressed."

"Every breath you take depends on this ancient symbiosis. The mitochondria convert oxygen to energy. Your cells provide shelter and nutrients. Neither could exist alone in their current form. Most business strategies assume independence: build your product (the phenotypic facet presented t..."