Thermoregulation

21 cards·by sarah

Potential Energy

Stored energy

Kinetic energy

energy being used

First law of thermodynamics

energy can't be created or destroyed but transferred and transformed

Levels of Energy

Radiation, chemical, heat

Metabolic energy

energy involved in metabolism- photosynthesis, resipiration

Thermophysical energy

energy from interacting w/ environment- sunlight

Radiation

Sunlight hitting organism

Conduction

heat exchange w/ substrate- heat goes from warmer to cooler

Convection

heat exchange w/ moving air

Evaporation

heat loss due to evaporation of water

Cold plants

dark perpendicular leaves, low to ground, dome shaped, tightly packed

Desert plants

light parallel leaves, away from ground, space between leaves

Skunk cabbage

generates own heat from starch in roots. Metabolic heat

Animal prevent heat loss

hair, feathers

Subcutaneous insulation

lipid layer under skin

Vaso constriction

skin vessels thinner and shunt vessels thicker Keep heat

Vasodialation

skin vessels thicker, shunt thinner. Loss heat

Counter current heat exchange

two opp flowing vessels next to each other

Behavioral thermoregulation

move to ideal temperature

Evaporative cooling

sweating, panting, bathing

Metabolic heat

burn fuel to control temperature. Shivering, wing muscles in insects