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Assignment 1

Midterm - K.Cha

QuestionAnswer
Homeostasis Concept of internal stability
Feedback control loops stimulus changes variable & sends afferent signal, receptor senses change & sends efferent signal, control center compares this w/set point value, effectors adjust accordingly
Afferent signal travel towards
Efferent signal travel away
Integrator receives signal from sensor, located in the brain
Positive feedback loop increases the change that is occurring to the body vs reversing it, i.e. childbirth
Negative feedback loop reverses the change occurring in the body in order to return to a constant state, i.e. shivering
Circadian rhythm/cycles body's internal clock that can change hormone secretion, blood pressure and body temperature based on time of the day
Feed-forward Information being transmitted ahead of time in preparation of any changes, i.e. stomach stretching when you begin eating food and it has not arrived in the stomach
Intrinsic control mechanism/local control/autoregulation makes use of chemical signals at organ & tissue level, can be built into the organ/tissue,
Intracellular control mechanism at the cellular level, regulates functions w/in the cell
Extrinsic control mechanism at the organ system & organism level, nerve signals come from outside the controlled organ
Created by: krystcha17
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