1. 01_08 Homeostatic mechanism regulates body temperature Slide number: 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Control center The brain detects the deviation from the set point and signals effector organs. Receptors Thermoreceptors send signals to the control center. Effectors Skin blood vessels dilate and sweat glands secrete. Stimulus Body temperature rises above normal. Response Body heat is lost to surroundings, temperature drops toward normal. too high too low Normal body Temperature 37 o C (98.6 o F) Stimulus Body temperature drops below normal. Response Body heat is conserved, temperature rises toward normal. Receptors Thermoreceptors send signals to the control center. Effectors Skin blood vessels constrict and sweat glands remain inactive. Effectors generates body heat. Control center The brain detects the deviation from the set point and signals effector organs. If body temperature continues to drop, control center signals muscles to contract involuntarily.

2. 01_08 Homeostatic mechanism regulates body temperature Slide number: 2 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature rises above normal. too high Normal body Temperature 37 o C (98.6 o F)

3. 01_08 Homeostatic mechanism regulates body temperature Slide number: 3 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Receptors Thermoreceptors send signals to the control center. Stimulus Body temperature rises above normal. too high Normal body Temperature 37 o C (98.6 o F)

4. 01_08 Homeostatic mechanism regulates body temperature Slide number: 4 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Control center The brain detects the deviation from the set point and signals effector organs. Receptors Thermoreceptors send signals to the control center. Stimulus Body temperature rises above normal. too high Normal body Temperature 37 o C (98.6 o F)

5. 01_08 Homeostatic mechanism regulates body temperature Slide number: 5 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Control center The brain detects the deviation from the set point and signals effector organs. Receptors Thermoreceptors send signals to the control center. Effectors Skin blood vessels dilate and sweat glands secrete. Stimulus Body temperature rises above normal. too high Normal body Temperature 37 o C (98.6 o F)

6. 01_08 Homeostatic mechanism regulates body temperature Slide number: 6 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Control center The brain detects the deviation from the set point and signals effector organs. Receptors Thermoreceptors send signals to the control center. Effectors Skin blood vessels dilate and sweat glands secrete. Stimulus Body temperature rises above normal. Response Body heat is lost to surroundings, temperature drops toward normal. too high Normal body Temperature 37 o C (98.6 o F)

7. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 7 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal.

8. Receptors Thermoreceptors send signals to the control center. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 8 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal.

9. Receptors Thermoreceptors send signals to the control center. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 9 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal. Control center The brain detects the deviation from the set point and signals effector organs.

10. Receptors Thermoreceptors send signals to the control center. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 10 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal. Control center The brain detects the deviation from the set point and signals effector organs. If body temperature continues to drop, control center signals muscles to contract involuntarily.

11. Effectors Skin blood vessels constrict and sweat glands remain inactive. Receptors Thermoreceptors send signals to the control center. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 11 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal. Effectors Muscle activity generates body heat. Control center The brain detects the deviation from the set point and signals effector organs. If body temperature continues to drop, control center signals muscles to contract involuntarily.

12. Effectors Skin blood vessels constrict and sweat glands remain inactive. Receptors Thermoreceptors send signals to the control center. too low Normal body Temperature 37 o C (98.6 o F) 01_08 Homeostatic mechanism regulates body temperature Slide number: 12 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Stimulus Body temperature drops below normal. Response Body heat is conserved, temperature rises toward normal. Effectors Muscle activity generates body heat. Control center The brain detects the deviation from the set point and signals effector organs. If body temperature continues to drop, control center signals muscles to contract involuntarily.