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physiology notes
lecture unit one - homeostasis physiological rhythms
| Question | Answer |
|---|---|
| the study of function or how the body works | physiology |
| levels of organization of the body | elementary particles--atoms--molecules--organelles--cells--tissues--organs--organ systems--organism |
| maintenance of a stable steady internal environment of constancy of environment | homeostasis |
| 3 associated areas of physiology | anatomy, physic, chemistry |
| ___ regulate the activities of all body parts | homeostatic processes |
| deviations from ___ ___ trigger reactions that work to counteract or reverse the change | stable conditions |
| a principle which demonstrates the effects of various factors or conditions on functional efficiency of the bodily processes | law of the maximum and minimum |
| pH, temperature, ion balance, sugar, are factors that applies to | law of the maximum and minimum |
| optimal range or range of tolerance is known as | law of the maximum and minimum |
| a control mechanism in which a response feeds back to the original point of stimulation | basic feedback mechanism |
| 3 basic components of basic feedback mechanism | receptors, modulators, effectors |
| stimulus--_____----_____-----_____---response | stimulus---receptor--modulator--effector-- response |
| specialized sensory cells/tissues | receptors |
| what are called control points or control centers | modulators |
| muscles and glands which may affect other tissues are called | effectors |
| negative and positive feedback are types of | feedback mechanisms |
| the response cancels or counteracts the original stimulus is known as | negative feedback |
| body temperature control is an ex of a type of | negative feedback |
| the response amplifies or enhances the original stimulus is known as | positive feedback |
| labor contractions is an ex of | positive feedback |
| 2 sources of homeostatic control are | intrinsic and extrinsic |
| control coming from within an organ/tissue via chemicals produced within the organ/tissue itself | intrinsic |
| control comes from outside the organ | extrinsic |
| regulation by nervouse system via neurotransmitters is a type of ___ homeostatic control that lasts in duration | extrinsic and quicker and shorter in duration |
| regulation by endocrine system bia hormones is a type of ____ homeostatic control that lasts in duration | extrinsic and slower and longer in duration |
| biorhythms that fluctuate or cycle every 24 hourse are referred toas | circadian rhythms |
| homeostatic mechanisms allow bodily functions to fluctuate within narrow limits | physiological rhythms |
| ___ allow bodily functions to have a dynamic equilibrium | physiological rhythms |
| fluctuations thend to follow wave patterns called | biorhythms or physiological rhythms |
| most important tissue, the ____ may acts as a biological clock | hypothalamus |
| jet lag, work rotation, radical sleep schedule are causes of | desynchronosis |
| effects of ___ are decrease congitive function, general depression , off sleep cycle, decrease visual acuity | desynchronosis |
| circadian rhythms are controlled internally by a ___ which can be set by various external stimuli most important being ___ | biological clock and light |
Created by:
JohnPink
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