Physiology

Metabolic Rate

The rate at which an organism consumes energy, typically measured as oxygen consumption or heat production per unit time. Determines the pace of biological processes.

Used in the Books

This term appears in 10 chapters:

Foundations Introduction

"This is where we show how the biological principle maps to organizational behavior. Sometimes the connection is obvious - burn rate and metabolic rate are literally the same thing. Sometimes it's surprising. For example, the reason your company culture feels different in each office is the same reas..."

Foundations Metabolism and Burn Rate

"At night, when it can't feed, the hummingbird does something remarkable: it enters torpor, a hibernation-like state where its metabolic rate drops dramatically, its body temperature falls, and it essentially shuts down non-essential systems. Without this metabolic flexibility, it would sta..."

Resource Dynamics Hibernation Reserve Strategy

"...ute → 8 bpm (84% reduction) - Breathing: 8 breaths/min → 1 breath/min (88% reduction) - Body temperature: 98°F (37°C) → 88-93°F (31-34°C) - Metabolic rate: ~75% reduction in calorie consumption - Duration: 5-7 months (October to March in Yellowstone) - Weight loss: 15-30% of pre-hibernation bo..."

Resource Dynamics Storage vs Immediate Use

"...ry: Larger hippocampus means larger brain, which means higher metabolic cost. The nutcracker's brain consumes approximately 20-25% of total resting metabolic rate (compared to 15-18% in non-caching birds of similar size). The trade-off**: Higher metabolic cost (bigger brain) enables higher storage efficiency..."

Resource Dynamics Caloric Restriction

"Not starvation (which kills quickly), but controlled restriction (which extends life dramatically). The biological reason: metabolic rate determines aging rate. Metabolism produces reactive oxygen species (ROS - superoxide O₂⁻, hydrogen peroxide H₂O₂, hydroxyl radical •OH)."

And 5 more chapters...

Biological Context

Metabolic rate scales with body mass to the 3/4 power (Kleiber's Law)—larger animals have slower mass-specific metabolic rates. This affects lifespan, heart rate, growth rate, and many other traits. Environmental temperature also affects metabolic rate in cold-blooded organisms.

Related Terms

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