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Links to the current specifications PowerPoint Presentation
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Links to the current specifications

Links to the current specifications

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Links to the current specifications

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  1. Links to the current specifications

  2. Thermoregulation in endotherms Endotherms generate most of their heat metabolically. As they are warmer than their environment they tend to lose body heat to their surroundings. • Adaptations for heat conservation include: • Insulation – insulating layers of fat, fur or feathers to prevent heat loss. • Metabolism – metabolic rate can be varied to generate more or less heat. Endotherms also use their skin to vary their rate of heat loss and maintain a constant core body temperature.

  3. Thermoregulation in humans

  4. Hyperthermia and hypothermia Prolonged exposure to high temperatures can lead to hyperthermia. The body’s core temperature rises above 41°C causing its thermoregulatory mechanisms to break down. When this happens, positive feedback occurs and the person’s body temperature can spiral out of control. A core body temperature of 43°C and higher usually causes death. If the body’s core temperature falls below 35°C a person may suffer from hypothermia. Again the body’s thermoregulatory mechanisms fail and positive feedback occurs leading to a further decrease in temperature.

  5. Physiological thermoregulation

  6. Thermoregulatory control system