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Study sets matching "negative feedback"

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Study sets matching "negative feedback"

12 terms
NEGATIVE FEEDBACK
HOMEOSTASIS
NEGATIVE FEEDBACK
POSITIVE FEEDBACK
STIMULUS
the maintenance of balance in the internal environment of an…
mechanism of homeostasis, where a change in stabilization of…
Feedback that tends to magnify a process or increase its outp…
Any kind of signal that carries information from your 5 senses.
HOMEOSTASIS
the maintenance of balance in the internal environment of an…
NEGATIVE FEEDBACK
mechanism of homeostasis, where a change in stabilization of…
9 terms
Negative Feedback & Positive Feedback
Receptors/ Sensor
Control Center
Effector
Negative Feedback
Detect changes : Negative feedback
Sends information : Negative feedback
Changes to balance out : Negative feedback
When a deviation from the norm occurs the body response is by…
Receptors/ Sensor
Detect changes : Negative feedback
Control Center
Sends information : Negative feedback
13 terms
Negative Feedback
Negative feedback
Positive feedback
Mammalian oestrus cycle
Control of the menstrual cycle is by:
Causes corrective mechanisms in the body to stop
Causes corrective mechanisms in the body to continue
The menstrual cycle
FSH, LH, oestrogen and progesterone
Negative feedback
Causes corrective mechanisms in the body to stop
Positive feedback
Causes corrective mechanisms in the body to continue
9 terms
Homeostasis and Negative and Positive Feedback
Negative Feedback
Positive Feedback
Homeostasis
Homeostatic Control
is the reaction that causes a decrease in function
occurs when the output of a system acts to enhance the change…
A system that regulates it's internal environment in order to…
3 interdependent components: receptor, control center and eff…
Negative Feedback
is the reaction that causes a decrease in function
Positive Feedback
occurs when the output of a system acts to enhance the change…
9 terms
Negative Feedback System - Hypertension
Stimulus
Controlled Condition
Receptor
Input
stress causes heart to beat faster and harder, causing blood…
blood Pressure (the force exerted by blood as it presses agai…
baroreceptors (are pressure-sensitive nerve cells located in…
the baroreceptors send nerve impulse to the brain
Stimulus
stress causes heart to beat faster and harder, causing blood…
Controlled Condition
blood Pressure (the force exerted by blood as it presses agai…
9 terms
Biology- Negative and Postive Feedback
Negative
sweat=
cold=
high blood sugar
a responsible your body to restore homeostasis.
evaportation
shiver
releases insulin goes up
Negative
a responsible your body to restore homeostasis.
sweat=
evaportation
9 terms
HOMEOSTASIS AND NEGATIVE FEEDBACK
HOMEOSTASIS
NEGATIVE FEEDBACK
POSITIVE FEEDBACK
STIMULUS
This is the maintenance of balance in the internal environmen…
A primary mechanism of homeostasis, whereby a change in stabi…
Feedback that tends to magnify a process or increase its outp…
Any kind of signal that carries information from your 5 senses.
HOMEOSTASIS
This is the maintenance of balance in the internal environmen…
NEGATIVE FEEDBACK
A primary mechanism of homeostasis, whereby a change in stabi…
10 terms
Homeostasis, Positive Feedback, Negative Feedback
Homeostasis
Homeostatic Regulation
Homeostatic Regulation: Receptor
Homeostatic Regulation: Control Center…
-A state of internal balance or stable internal environment... -…
-Adjustments in physiological systems that preserve homeostas…
Senses a particular change or stimulus
Receives and processes information from the receptor
Homeostasis
-A state of internal balance or stable internal environment... -…
Homeostatic Regulation
-Adjustments in physiological systems that preserve homeostas…
11 terms
Negative Feedback 'Loop'
negative feedback
negative feedback
negative feedback
negative feedback
-preferred by body b/c it's easy to complete... ->promotes home…
-promotes stability of internal environment(ECF and homeostas…
-resists deviations from an acceptable range, corrects distur…
the end result should oppose the beginning
negative feedback
-preferred by body b/c it's easy to complete... ->promotes home…
negative feedback
-promotes stability of internal environment(ECF and homeostas…
7 terms
HOMEOSTASIS AND NEGATIVE FEEDBACK
HOMEOSTASIS
NEGATIVE FEEDBACK
STIMULUS
RESPONSE
This is the maintenance of balance in the internal environmen…
A primary mechanism of homeostasis, whereby a change in stabi…
Any kind of signal that carries information from your 5 senses.
A change in behavior that occurs as a result of a stimulus.
HOMEOSTASIS
This is the maintenance of balance in the internal environmen…
NEGATIVE FEEDBACK
A primary mechanism of homeostasis, whereby a change in stabi…
15 terms
Negative Feedback System (Bone)
Heart may stop if calcium level is
breathing may stop if calcium level is
Stimulus (Step 1)
Receptor (step 2)
high
low
disrupt in homeostasis by decreasing blood in calcium level
Parathyroid gland cells detect the lower calcium levels cause…
Heart may stop if calcium level is
high
breathing may stop if calcium level is
low
29 terms
Endocrine: Negative feedback
Negative feedback for thyroid hormones
Negative feedback for FSH
blood calcium regulation
negative feedback for cortisol
when the T3/4 levels get too high, the inhibit the secretion…
Negative feedback for thyroid hormones
when the T3/4 levels get too high, the inhibit the secretion…
Negative feedback for FSH
9 terms
Positive and Negative feedback effects
Positive Feedback Effects
Ice Albedo Feedback
Amazon Rainforest Feedback
Acidification of the Oceans
This is where a rise in temperatures causes a set of processe…
Increase temp - Melting of sea ice - less ice to reflect radi…
Increase temp - More droughts in rainforest - forest turns in…
Increase CO2 - Half of all CO2 dissolved into oceans - Ocean…
Positive Feedback Effects
This is where a rise in temperatures causes a set of processe…
Ice Albedo Feedback
Increase temp - Melting of sea ice - less ice to reflect radi…
15 terms
Positive and Negative Feedback
Negative Feedback
Positive Feedback
Negative Feedback
Negative Feedback
Opposes or negates stimulus
Enhances or triggers stimilus
Negative or Positive Feedback?... Increased pressure in the aort…
Negative or Positive Feedback?... A rise in blood calcium levels…
Negative Feedback
Opposes or negates stimulus
Positive Feedback
Enhances or triggers stimilus
29 terms
Positive and Negative Feedback Loops
negative feedback loop
positive feedback loop
homeostasis
temperature regulation
Brings you closer and stabilizes to the target set point. ex.…
moving away from target set point. Usually seen when we want…
internal stable environment maintained by feedback loops
maintaining body temperature within limits.
negative feedback loop
Brings you closer and stabilizes to the target set point. ex.…
positive feedback loop
moving away from target set point. Usually seen when we want…
8 terms
Negative and Positive Feedback
Negative Feedback
Examples of negative feedback
Receptors
Control center in hypothalamus
Output of a system opposes changes to the input of another sy…
Regulation of blood volume by ADH
Sense decreased blood volume
Stimulates pituitary gland to release antidiuretic hormone (A…
Negative Feedback
Output of a system opposes changes to the input of another sy…
Examples of negative feedback
Regulation of blood volume by ADH
23 terms
Positive and Negative feedback!
What is negative feedback?
What is the positive feedback cycle (l…
What does Equilibrium mean?
Is negative feedback good or bad thing?
Where changes within the system slow down or reduce the cause…
Where additional further change occurs because an effect has…
Equilibrium is a state of balanced inputs and outputs. This i…
Its a good thing, it leads to a more balanced equilibrium!
What is negative feedback?
Where changes within the system slow down or reduce the cause…
What is the positive feedback cycle (l…
Where additional further change occurs because an effect has…
Positive and Negative feedback
What starts the positive feedback loop…
Describe the positive feedback loop be…
How is this positive feedback loop ter…
Describe the importance of homeostatic…
This cycle begins when the child enters the cervix and stretc…
When the child enters the cervix it stretches, or dilates, an…
The birth of the child reduces and eliminates the stimuli to…
Temperature that rises too high or drops too low causes diffe…
What starts the positive feedback loop…
This cycle begins when the child enters the cervix and stretc…
Describe the positive feedback loop be…
When the child enters the cervix it stretches, or dilates, an…
5 terms
Negative and Positive Feedback Mechanisms
negative feedback
set point
Example: temperature regulation
Positive feedback
the resulting action will always be in the opposite direction…
the variable that is maintained within a normal level
drop in temp. is detected by the sensory receptors of the ski…
the stimulus here is reinforced to continue in the same direc…
negative feedback
the resulting action will always be in the opposite direction…
set point
the variable that is maintained within a normal level
10 terms
Homeostasis & Negative and Positive Feedback
Homeostasis
Receptor
Control center
Effector
A state of equillibrium. All body systems work together to ma…
In homeostasis, the system that receives the stimulus.
In homeostasis, the system that processes the signal from the…
In homeostasis, the system that carries out the instructions…
Homeostasis
A state of equillibrium. All body systems work together to ma…
Receptor
In homeostasis, the system that receives the stimulus.
10 terms
Positive Versus Negative Feedback Examples
Positive feedback
Negative feedback
Negative feedback
Negative Feedback
changes to make the action continue, or increase with intensity
changes to reduce the action, or make it stop.
The temperature on the thermostat is set to 70 degrees. When…
The pupil of your eye gets smaller when you are in the sun.
Positive feedback
changes to make the action continue, or increase with intensity
Negative feedback
changes to reduce the action, or make it stop.
11 terms
Chapter 1 Negative Feedback
maintains homeostasis
control variable
sensor
control center
deviations from the desired conditions are automatically dete…
physical and chemical property (blood pressure, temperature)…
monitors control variable ... - sends information (nerves/hormon…
receives information from the sensor... - compares information s…
maintains homeostasis
deviations from the desired conditions are automatically dete…
control variable
physical and chemical property (blood pressure, temperature)…
Positive and Negative Feedback
Positive Feedback
Negative feedback
Example of Positive Feedback
Example of Negative Feedback
feedback that amplifies/increases change ... (it leads to expone…
feedback that tends to damp down/neutralize/counteract any de…
the shrinking of ice sheets due to increased global warming f…
more CO2 in atmosphere leads to increased temperatures and mo…
Positive Feedback
feedback that amplifies/increases change ... (it leads to expone…
Negative feedback
feedback that tends to damp down/neutralize/counteract any de…
7 terms
Positive & Negative Feedback
Homeostasis
Homeostatic Mechanism
Homeostatic Mechanism Example
Negative Feedback
Maintaining a stable internal environment... - -Depend on normal…
Stimulus... Receptors: provide information about specific condit…
Stimulus: body temperature rises above normal... Receptors: sens…
Works to correct a deviation from a set point (Tries to get b…
Homeostasis
Maintaining a stable internal environment... - -Depend on normal…
Homeostatic Mechanism
Stimulus... Receptors: provide information about specific condit…
7 terms
Anatomy ~ Positive & Negative Feedback
Homeostasis
Homeostatic Mechanism
Homeostatic Mechanism Example
Negative Feedback
Maintaining a stable internal environment... - -Depend on normal…
Stimulus... Receptors: provide information about specific condit…
Stimulus: body temperature rises above normal... Receptors: sens…
Works to correct a deviation from a set point (Tries to get b…
Homeostasis
Maintaining a stable internal environment... - -Depend on normal…
Homeostatic Mechanism
Stimulus... Receptors: provide information about specific condit…
11 terms
NEGATIVE FEEDBACK QUIZ
HOMEOSTASIS
NEGATIVE FEEDBACK
INSULIN
GLUCOGEN
The maintenance of balance in the internal environment of an…
Mechanism of homeostasis, where a change in stabilisation of…
Insulin is a hormone that lowers the level of glucose (a type…
The body breaks down most carbohydrates from the foods we eat…
HOMEOSTASIS
The maintenance of balance in the internal environment of an…
NEGATIVE FEEDBACK
Mechanism of homeostasis, where a change in stabilisation of…
5 terms
Negative Feedback Mechanism - Science
stimulus
receptor
processing center
effector
factor that is not optimum
senses factor sends message
responds to the message, messaging (nerves of hormones) effec…
makes change to get back to optimum
stimulus
factor that is not optimum
receptor
senses factor sends message
8 terms
Anatomy Negative Feedback Loops
Stimulation
Controlled Condition
Receptor
Input
What triggers the change---> extreme external temp
Narrow range that must be maintained--> body temp 98.6
Monitors controlled condition--> thermo
Communication--> nerve impulses
Stimulation
What triggers the change---> extreme external temp
Controlled Condition
Narrow range that must be maintained--> body temp 98.6
5 terms
Positive and negative feedback
Negative feedback
Controlled by negative feedback
Positive feedback
Controlled by positive feedback
A control system which maintains the body's internal environm…
Body temp., blood glucose levels, and blood pressure
Amplify, increase, or speed up a physiological response in or…
Fruit ripening, fever, blood clotting, childbirth, and lactat…
Negative feedback
A control system which maintains the body's internal environm…
Controlled by negative feedback
Body temp., blood glucose levels, and blood pressure
7 terms
1.6 Negative feedback
Negative feedback
Body Temperature
Rises above
falls below
Regardless of whether the stimulus rises or falls at the rece…
37C ( 98.6F )
37.2C ( 99F )
36.7C ( 98F )
Negative feedback
Regardless of whether the stimulus rises or falls at the rece…
Body Temperature
37C ( 98.6F )
7 terms
negative/positive feedback systems
negative feedback system
positive feedback system
examples of positive feedback
examples of negative feedback
reverses a change in a controlled condition
tends to strengthen or reinforce a change in one of the body'…
normal childbirth, what happens to your body when you lose a…
regulation of blood pressure
negative feedback system
reverses a change in a controlled condition
positive feedback system
tends to strengthen or reinforce a change in one of the body'…
5 terms
Negative Feedback Loops
The Blood becomes more concentrated:
Blood Glucose increases:
Blood Calcium decreases:
Blood Potassium and hydrogen ion:
The blood becomes more concentrated (i.e. water content of bl…
Blood glucose increases --> pancreas releases insulin --> ins…
Blood calcium decreases --> parathyroid glands release PTH --…
Blood potassium and hydrogen ion concentration increase --> t…
The Blood becomes more concentrated:
The blood becomes more concentrated (i.e. water content of bl…
Blood Glucose increases:
Blood glucose increases --> pancreas releases insulin --> ins…
Positive and Negative Feedback
Positive Feedback
Childbirth
Blood Clotting
Fever
A loop is when positive feedback stimulates, enhances, or amp…
Positive: During labor a hormone called oxytocin is released,…
Positive: The loop is initiated when injured tissue releases…
Positive: Immune system detects a virus in the body replicati…
Positive Feedback
A loop is when positive feedback stimulates, enhances, or amp…
Childbirth
Positive: During labor a hormone called oxytocin is released,…
5 terms
Negative Feedback Loop 2
5
6
7
8
Glucose levels decrease
Level of insulin declines
Pancreas releases glucagon
Liver turns glycogen to glucose
5
Glucose levels decrease
6
Level of insulin declines
8 terms
Homeostasis and Negative Feedback
Homeostasis
Feedback System
Stimulus
Controlled condition
The condition of equilibrium in the body's internal environme…
A cycle of events in which the status of a body condition is…
Disrupts homeostasis by increasing or decreasing a controlled…
Each monitored variable, such as body temperature or blood pr…
Homeostasis
The condition of equilibrium in the body's internal environme…
Feedback System
A cycle of events in which the status of a body condition is…
15 terms
Positive and Negative Feedback
Negative Feedback
Positive Feedback
Negative Feedback
Negative Feedback
Opposes or negates stimulus
Enhances or triggers stimilus
Negative or Positive Feedback?... Increased pressure in the aort…
Negative or Positive Feedback?... A rise in blood calcium levels…
Negative Feedback
Opposes or negates stimulus
Positive Feedback
Enhances or triggers stimilus
12 terms
Positive + Negative Feedback Loops
homeostasis
feedback loops
negative feedback loop
positive feedback loop
ability for the body to maintain internal stability
maintain and restore balance
response is reversed
response is enhanced
homeostasis
ability for the body to maintain internal stability
feedback loops
maintain and restore balance
5 terms
Negative feedback Ca
Control center
Receptor
Input
Output
PTH gene
Parathyroid gland cells
Cyclic AMP
Release of PTH
Control center
PTH gene
Receptor
Parathyroid gland cells
40 terms
PCS negative feedback loops
Controlled Variable Ca
Sensor Ca
Controller Ca
Actuating Ca
Plasma [Ca]
CaSR (PT Gland Cell)
PT Gland Cell
Plasma [PTH]
Controlled Variable Ca
Plasma [Ca]
Sensor Ca
CaSR (PT Gland Cell)
21 terms
Homeostasis and Negative Feedback
Insulin
Glucagon
Somatostatin
GLUT4
hormone in control - created by beta cells in islet cells of…
hormone in control - created by alpha cells in islet cells of…
hormone in control - created by delta cells in islet cells of…
transporter found in heart tissue, skeletal muscle. opens cel…
Insulin
hormone in control - created by beta cells in islet cells of…
Glucagon
hormone in control - created by alpha cells in islet cells of…
6 terms
positive and negative feedback
negative
positive
positive
negative
response is opposite of or counters the stimulus
response amplifies or reinforces the stimulus
continues to disrupt homeostasis
restores homeostasis
negative
response is opposite of or counters the stimulus
positive
response amplifies or reinforces the stimulus
8 terms
Negative feedback loop process
1 stimulus
2
3 receptor
4 input
produces change in variable
change is detected by receptor
detects change
information sent along afferent pathway to
1 stimulus
produces change in variable
2
change is detected by receptor
15 terms
Homeostasis: Negative Feedback Examples
Homeostasis
Stimulus
Receptor
Control Center
The body's ability to maintain a relatively stable internal e…
Step 1 in homeostatic control mechanism: Changes in a variabl…
Step 2 in homeostatic control mechanism: Structure that detec…
Step 3 in homeostatic control mechanism: Integrates input & i…
Homeostasis
The body's ability to maintain a relatively stable internal e…
Stimulus
Step 1 in homeostatic control mechanism: Changes in a variabl…
10 terms
Negative and Positive Feedback
Negative Feedback
Positive Feedback
Dynamic Equilibrium/set point
120 over 80
Opposite direction as the stimuli.
Same direction as the stimuli.
Negative feedback allows for ___ w.in a limited range around…
Normal blood pressure.
Negative Feedback
Opposite direction as the stimuli.
Positive Feedback
Same direction as the stimuli.
8 terms
Hormones and Negative Feedback
Calcitonin
Parathormone
Aldosterone
Atrial Natriuretic Peptide
Decreases blood calcium ion levels
Increases blood calcium ion levels
Increases blood sodium ion levels... Increases water volume
Decreases blood sodium ion levels... Decreases water volume
Calcitonin
Decreases blood calcium ion levels
Parathormone
Increases blood calcium ion levels
12 terms
Negative Feedback System
Stimulus
Sensor
Control
Effector
a thing or event that has specific functional reaction
a device which detects or measures a physical property and re…
the power to influence or direct the course of events.
an organ or cell that acts in response to a stimulus.
Stimulus
a thing or event that has specific functional reaction
Sensor
a device which detects or measures a physical property and re…
8 terms
Positive & Negative Feedback
Negative Feedback
Positive Feedback
Homeostasis
Ectotherm
Close to target set point . Ex: body temperature, glucose lev…
Challenge towards target set point. Ex: fruit ripening, child…
Maintaining a stable environment
Internal temperature is close to external temperature
Negative Feedback
Close to target set point . Ex: body temperature, glucose lev…
Positive Feedback
Challenge towards target set point. Ex: fruit ripening, child…
8 terms
Negative feedback loop
Negative feedback loop
Positive feedback loop
Set point
Afferent
Mechanism of homeostasis that maintains a set point
Accelerates a change to a set point. Almost always bad
Something the Bodhgaya to keep at a set rate
Signal from body to brain
Negative feedback loop
Mechanism of homeostasis that maintains a set point
Positive feedback loop
Accelerates a change to a set point. Almost always bad
33 terms
Homeostasis and Negative Feedback
Dynamic Equillibrium
Negative Feedback
Receptor
Effector
balanced change, in which there is a certain set point or ave…
a process in which the body senses a change and activates mec…
a structure that senses a change in the body.
a structure that carries out the response that restores homeo…
Dynamic Equillibrium
balanced change, in which there is a certain set point or ave…
Negative Feedback
a process in which the body senses a change and activates mec…
8 terms
temperature negative feedback homeostasis
stimulus
controlled condition (set point)
receptor
input
temperature rises
body temperature (98.6*)
thermoreceptor
nerve impulse to hypothalamus
stimulus
temperature rises
controlled condition (set point)
body temperature (98.6*)
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