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Homeostasis Vocabulary Flashcards

Homeostasis Vocabulary Flashcards
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Baroreceptors
Sensors in the blood vessels that detect changes in blood pressure
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Error correction system
Works to return a physiological variable to its set point by minimizing the difference between the current and correct values; also known as a negative feedback system.
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Negative feedback system
Works to return a physiological variable to its set point by minimizing the difference between the current and correct values; also known as an error correction system
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Control system
1) sensors that detect changes; 2) a control center (the brain) that determines adjustments to be made; and 3) effector(s) that carry out the compensatory response
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Effector
A tissue or organ that is activated by the control center (the brain) in response to disruption of homeostasis
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Sensors
The components of a control system that detect stimuli, such as a change in body temperature or blood pressure, and transmit signals to the control center
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Control center
The component of a control system that receives signals from sensors and activates regulatory responses. In human homeostasis, this would be the brain.
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Compensatory response
A reaction of regulatory processes in the body to maintain balance and stability when physiological variables move away from their normal range
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Set point
Normal range of a physiological variable
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'stasis'
The Greek root word of homeostasis that means 'stable'
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'homeo'
The Greek root word of homeostasis that means 'similar'
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Homeostasis
State of equilibrium in the body achieved when regulatory processes are able to maintain conditions, such as temperature, blood pressure, and blood glucose, within their normal range
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24 cards in set

Flashcard Content Overview

These flashcards cover information on how the body maintains relatively constant internal conditions, or homeostasis, despite a constantly changing environment. You will learn the definitions of basic related terms, such as set point, compensatory response, and negative feedback system. The flashcard deck also provides examples of disease states that occur when the body cannot achieve homeostasis.

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Homeostasis
State of equilibrium in the body achieved when regulatory processes are able to maintain conditions, such as temperature, blood pressure, and blood glucose, within their normal range
'homeo'
The Greek root word of homeostasis that means 'similar'
'stasis'
The Greek root word of homeostasis that means 'stable'
Set point
Normal range of a physiological variable
Compensatory response
A reaction of regulatory processes in the body to maintain balance and stability when physiological variables move away from their normal range
Control center
The component of a control system that receives signals from sensors and activates regulatory responses. In human homeostasis, this would be the brain.
Sensors
The components of a control system that detect stimuli, such as a change in body temperature or blood pressure, and transmit signals to the control center
Effector
A tissue or organ that is activated by the control center (the brain) in response to disruption of homeostasis
Control system
1) sensors that detect changes; 2) a control center (the brain) that determines adjustments to be made; and 3) effector(s) that carry out the compensatory response
Negative feedback system
Works to return a physiological variable to its set point by minimizing the difference between the current and correct values; also known as an error correction system
Error correction system
Works to return a physiological variable to its set point by minimizing the difference between the current and correct values; also known as a negative feedback system.
Baroreceptors
Sensors in the blood vessels that detect changes in blood pressure
Thermoreceptors
Sensors in the skin that detect changes in environmental temperature
Diabetes
A chronic disease characterized by the failure to maintain blood sugar homeostasis, which can cause serious complications, such as blindness, kidney disease, and neuropathy
Hypertension
A cardiovascular condition caused by a failure in the homeostasis of blood pressure; this increases the risk of heart disease, stroke, and kidney failure
The thermostat registers a change in temperature on a hot day. Soon, the air conditioner powers on to cool your home to the desired temperature. What is the air conditioner an example of?
An effector
Receptors detect a drop in body temperature, and a signal is sent to the hypothalamus. In response, the hypothalamus sends out a message ordering your body to shiver. What is the control center?
The hypothalamus
Hypothalamus
The area of the brain responsible for monitoring and regulating the body's internal environment
The set point of human body temperature
98.6 degrees Fahrenheit (37 degrees Celsius)
The set point for volume of blood in the human body
5 liters
Osmolarity
The concentration of particulate matter in a liquid
The set point for osmolarity of human blood
300mOsm
List examples of physiological variables maintained in homeostasis
Examples include blood volume, blood pressure, osmolarity and composition of the blood, and body temperature
When you drink water, you increase your blood volume and your blood pressure. The baroreceptors send a signal to the brain, and then your kidneys produce urine. What is the effector?
The kidneys

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