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Fofi core
Cell membrane, endocrine, neurophysiology
| Question | Answer |
|---|---|
| p.H. | 7.35 |
| body temp. | 37º celsius |
| glucose | 70-110 mg/dL |
| O₂ | 100 mmHg |
| CO₂ | 40 mmHg |
| blood volume | 5L |
| blood pressure | 120/80 mmHg |
| Homeostasis | maintenance of a relatively stable internal environment |
| ECF extracellular fluid | Fluid environment in which cells live: Two components-plasma and interstitial fluid |
| ICF intracellular fluid | fluid contained within all body cells |
| Two systems that maintain homeostasis? | Endocrine and nervous |
| endocrine system | consists of glands that secret hormones that travel via the bloodstream. |
| Endocrine S. as it relates to homeostasis? | secreting glands of endocrine regulate activities that require duration rather than speed; controls concentration of nutrients and, via kidney function, controls internal environment's volume and electrolyte composition |
| nervous S. as it relates to homeostasis? | controls and coordinates bodily activities that require rapid responses; detects and initiates reactions to changes in external environment |
| homeostasis control system must be able to? | Detect deviations from normal in internal environment, integrate information with other relevant info., make adjustments to normal |
| Intrinsic control | Local controls that are inherent in an organ. |
| Extrinsic control | always means nervous and endocrine Systs., exists outside of local controls, can override local controls. |
| Feedforward | minimal in homeostasis, primarily refer to dynamics associated with sex and eating. Definition: responses made in anticipation of a change. |
| Feedback | responses made after a change; two types of feedback, negative and positive. Negative is vastly more common. |
| Negative feedback loop | i.e., back to normal. |