AP1 Fall 2014 Final Exam
Take Home – Due at 5 pm on October 29th.
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1. Homeostasis is an important theme in studying the human body. Discuss homeostatic processes in each of the organ systems we covered this semester. Be sure to include discussion of negative feedback, set points, receptors and effectors. (7 points each)
2. Homeostasis- The tendency of a living body to maintain relatively stable internal conditions in spite of greater changes in its external environment. (Saladin, 2015)
a. Integumentary System – Homeostasis is critical for our body function, in order to stay in homeostasis the body goes through a process called negative feedback. Negative feedback mechanism in the integumentary system goes through 4 steps in order to maintain homeostasis;
1. There is a stimulus or change in the body.
Example. Change in the body temperature.
a. If the body is too cold it will trigger shivering to warm your body. b. If your body is too hot it will trigger sweating to release heat. 2. The sensor or receptor (sensory neuron) detects change in your body. 3. The control center (brain) sends out signals and messages to the effector. 4. The effector (muscle or gland) is in charge of restoring the body back to homeostasis. (Saladin, 2015)

The body must regulate its own body temperature. Our normal set point is 98.6.When we are overheating our body responds in numerous ways in an effort to cool itself, such as sweating. Alternatively, if our body temperature is falling, we stimulate a process that conserve or generate heat, such as shivering.
Variable: Body temperature. Set point 98.6
Receptor: Hot and cold temperature sensors in the skin
Control Center: Hypothalamus in the brain
Effector: Sweating or Shivering www.passbiology.co.nz320 × 291Search by image

Skeletal System – Homeostasis is crucial physiological process in the