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BenTran StackP
| Question | Answer |
|---|---|
| Internal environment | body cells survived in a healthy condition only when the temp, pressure, chemical composition of their fluid environment remained relatively constant. |
| Homeostasis | the tendency toward a relatively stable equilibrium b/t interdependent elements, especially as maintained by physiological processes. |
| Set Point | Normal reading or range of normal is called the set point or setpoint range. |
| Integumentary | Separates internal environment from external environment, providing stability of internal fluid volume. |
| Skeletal | Support and protects internal environment, allowing movement; stores minerals that can be moved into and out of internal fluid. |
| Muscular | Powers and directs movements; provides heat. |
| Nervous | Regulate homeostatic mechanisms, sensing changes, integrating info, sending signal to effectors. |
| Endocrine | regulate homeostasis by secreting signaling hormones that travel through internal environment to effector cells |
| Cardiovascular | maintains internal constancy by transporting nutrients, water, o2, hormones, waters, and other materials and heat within the internal environement |
| Lymphatic | Maintains constant fluid pressure by draining excess fluid from tissues, cleaning it, and recycling it to bloodstream. |
| Immune | Defends internal environment against harmful agents |
| respiratory | Maintains stable o2 and co2 level in body by exchanging these gases b/t external and internal environments; provides vocal comm w other for protection, hunting, etc. |
| Digestive | maintains relatively constant nutrient level in body by digesting food and absorbing nutrients into internal environment |
| Urinary | Maintains constantly low level of waste and regulates pH of internal environment; helps maintain constancy of internal water volume and balance of ions and other substance. |
| reproductive | Passes genetic code containing information for forming a body and maintaining homeostasis to offspring. |
| Feedback control loops | the body monitors internal conditions and responds to maintain a stable internal environment (homeostasis). |
| How is feedback control loops regulate network | transmitted in control loops by nervous impulse or specific chemical call hormes, which are secreted into the blood. |
| What is the four basic components in the feedback loops | Sensor mechanism, integrator(control center), effector mechanism, and feedback. |
| Afferent | a signal traveling toward a particular center or point of reference. |
| Efferent | signal is moving away from a center or point of reference. |
| Sensor | must be able to identify the characteristic or condition being controlled. It must also be able to respond to any changes that may occur from the normal setpoint range. |
| Variable | is any state or condition in the body that can change or vary. |
| Integrator | "control center" of feedback loop. Often a discrete area of the brain, the integrator receives input from a homeostatic sensor. |
| Effector | an organs, such as muscles or glands, that directly influence controlled physiological variables. |
Created by:
TBen