Thermoregulation

Mr. Andersen discusses thermoregulation, explaining how organisms manage their internal temperature. He covers heat transfer methods like conduction, convection, and radiation, and differentiates between ectotherms and endotherms. Ectotherms rely on external heat sources, while endotherms maintain a constant internal temperature through metabolic processes and feedback loops. The video highlights the advantages and disadvantages of each strategy, using examples like turtles and humans.

What is the primary difference between ectotherms and endotherms?

• Ectotherms require more food than endotherms.

• Ectotherms have a constant internal temperature, while endotherms do not.

• Ectotherms rely on external sources for heat, while endotherms generate their own heat.

• Ectotherms generate their own heat, while endotherms rely on external sources.

Which method of heat transfer involves direct contact between molecules?

• Conduction

• Radiation

• Evaporation

• Convection

How does convection transfer heat?

• Through chemical reactions

• Via electromagnetic waves

• By the movement of fluids

• Through direct contact between objects

What is a disadvantage of being an ectotherm?

• They cannot regulate their body temperature.

• They require constant food intake.

• Their metabolism slows down in cold environments.

• They have a high metabolic rate.

How do endotherms maintain a stable internal temperature?

• Through hibernation

• By using a negative feedback loop

• Through constant exposure to sunlight

• By using a positive feedback loop