Study sets matching "negative feedback"

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Study sets matching "negative feedback"

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
Negative Feedback
1
2
3
4
The hypothalamus senses that cells need more energy and signa…
The pituitary gland releases thyroid stimulating hormone (TSH)
TSH signals the thyroid gland to produce more thyroxin
The hypothalamus senses that the thyroxin level is high enoug…
1
The hypothalamus senses that cells need more energy and signa…
2
The pituitary gland releases thyroid stimulating hormone (TSH)
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…
5 terms
Negative feedback
1
2
3
4
Stimulus:... High body temp
Sensor:... -thermreceptors
Control center:... -Nervous center
Effector:... -skin -blood vessels
1
Stimulus:... High body temp
2
Sensor:... -thermreceptors
negative feedback
negative feedback
feedback loop
effector
stimulus
an effect by its own influence on the process giving rise to…
a term commonly used in economics to refer to a situation whe…
an organ or cell that acts in response to a stimulus.
a thing or event that evokes a specific functional reaction i…
negative feedback
an effect by its own influence on the process giving rise to…
feedback loop
a term commonly used in economics to refer to a situation whe…
6 terms
Negative feedback
Step 1
Step 2
Step 3
Step 4
High blood sugar
Hypothalamus will detect the high blood sugar
Hypothalamus sends message to the pancreas
Pancreas produced insulin to lower blood sugar
Step 1
High blood sugar
Step 2
Hypothalamus will detect the high blood sugar
Negative Feedback
1
2
3
4
Hypothalamus senses cells need more energy
Pituitary releases TSH
Thyroid produces thyroxine
Hypothalamus senses cells have enough energy
1
Hypothalamus senses cells need more energy
2
Pituitary releases TSH
6 terms
Negative Feedback
step 1
step 2
step 3
step 4
the hypothalamus secretes thyrotropin- releasing hormone (TRH)
TRH stimulates the anterior pituitary to secrete thyroid-stim…
TSH stimulates the thyroid gland to secrete thyroid hormone (…
TH stimulates the metabolism of the most cells throughout the…
step 1
the hypothalamus secretes thyrotropin- releasing hormone (TRH)
step 2
TRH stimulates the anterior pituitary to secrete thyroid-stim…
Negative Feedback
What is negative feedback?
What are two examples of negative feed…
What do ADH receptors sense?
Where is the control center for blood…
the response reduces or shuts off the original stimulus
regulation of body temperature and regulation of blood volume…
decreased blood volume
in the hypothalamus which stimulates pituitary gland to relea…
What is negative feedback?
the response reduces or shuts off the original stimulus
What are two examples of negative feed…
regulation of body temperature and regulation of blood volume…
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
6 terms
Negative feedback
Stimulus: -->
Receptor-->
Control Centre -->
Effector-->
Increase in blood glucose levels
Chemoreceptor
brain
Pancreas
Stimulus: -->
Increase in blood glucose levels
Receptor-->
Chemoreceptor
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
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
5 terms
Negative Feedbacks
Negative Feedback: Homeostasis of Bloo…
Negative Feedback Regulation of Breath…
Negative Feedback: High blood glucose…
Negative Feedback System for Low Blood…
Pressure receptors (baroreceptors) in walls of certain arteri…
Increase in arterial pCO2... Stimulates CNS and peripheral chemo…
- Pancreas secretes insulin... - Insulin binds to insulin recept…
• Pancreas secretes glucagon into blood stream... • Targets live…
Negative Feedback: Homeostasis of Bloo…
Pressure receptors (baroreceptors) in walls of certain arteri…
Negative Feedback Regulation of Breath…
Increase in arterial pCO2... Stimulates CNS and peripheral chemo…
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…
7 terms
Homeostasis and Negative Feedback
Homeostasis
Set Point
Negative Feedback
Stimulus
the body's ability to maintain a stable internal environment
the "normal" range of that the body operates in
a corrective mechanism that reverses a change in the body
the change that happens to the body
Homeostasis
the body's ability to maintain a stable internal environment
Set Point
the "normal" range of that the body operates in
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…
6 terms
Negative and Positive Feedback
Negative feeback mechanism
3 components of negative feedback
Example of negative feedback
Homeostasis
Most systems of the body are regulated by it. It maintains ho…
Receptor: which monitors the value of a variable... Control cent…
Maintenance of normal blood pressure. Receptors monitor blood…
State of equilibrium in the body with respect to functions an…
Negative feeback mechanism
Most systems of the body are regulated by it. It maintains ho…
3 components of negative feedback
Receptor: which monitors the value of a variable... Control cent…
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…
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
topic 1-negative feedback
negative feedback
stimulus
receptors
control center
A primary mechanism of homeostasis, whereby a change in a phy…
Change in environment that causes response
Special structures that allow living organisms to sense the c…
receives info about stimulus and sends out signals to enact c…
negative feedback
A primary mechanism of homeostasis, whereby a change in a phy…
stimulus
Change in environment that causes response
negative feedback loop
Negative Feedback Loop
Negative feedback loop(human Thermoreg…
Negative feedback of BP
3 components of feedback loop
body senses a change an activates mechanisms to reverse it(dy…
*Brain senses change in blood temp.... -To warm: vessels dilate(…
sitting up in bed causes drop in BP in head and upper throax…
*Receptor-s... *Integrating(control)Center... *Effector
Negative Feedback Loop
body senses a change an activates mechanisms to reverse it(dy…
Negative feedback loop(human Thermoreg…
*Brain senses change in blood temp.... -To warm: vessels dilate(…
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…
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 '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…
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…
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
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.
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
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
Positive and Negative Feedback Loops
Feedback Loop
Homeostasis
Negative
Positive
cause and effect ... body system(s) respond
Stable internal balance
Stabilization (keep at target) - Temperature regulation... The…
Amplification (away from target) - fruit ripening, child birt…
Feedback Loop
cause and effect ... body system(s) respond
Homeostasis
Stable internal balance
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…
homeostasis negative feedback loop
a stimulus (a change) is detected by
a receptor sends information to a
a control center integrates and sends…
effectors (muscles and glands) make a
a receptor
control center
effectors
response
a stimulus (a change) is detected by
a receptor
a receptor sends information to a
control center
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
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…
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
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
Negative Feedback A&P
homeostasis control mechanisms
stimulus:
receptors
control center
stimulus, Detected by a receptor; receptor, afferent message;…
cold temperature on skin
temp receptors in skin
brain
homeostasis control mechanisms
stimulus, Detected by a receptor; receptor, afferent message;…
stimulus:
cold temperature on skin
5 terms
Negative Feedback Loop
Stimulus
In Homeostatic range
Receptor
Control Center
Body temperature decreases below normal range
As body temperature returns to normal, feedback stops shiveri…
Receptore in brain cells detect in temperature
Brain cells receive information and determine body temperatur…
Stimulus
Body temperature decreases below normal range
In Homeostatic range
As body temperature returns to normal, feedback stops shiveri…
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
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
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…
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…
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…
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
Anatomy ~ Positive & Negative Feedback
Homeostasis
Negative Feedback
Examples of Negative Feedback
Positive Feedback
Maintaining a stable internal environment... - -Depend on normal…
Works to correct a deviation from a set point (Tries to get b…
Body temperature... Blood pressure... Oxygen levels in blood... Thirst…
Changes from the normal point and amplifies it.
Homeostasis
Maintaining a stable internal environment... - -Depend on normal…
Negative Feedback
Works to correct a deviation from a set point (Tries to get b…
7 terms
Negative feedback loop/Homeostasis
imbalance
stimulus 1
step two
input 3
imbalance
produces change in variable, causes imbalance
change detected by receptor/sensor
information sent along afferent pathway to control center
imbalance
imbalance
stimulus 1
produces change in variable, causes imbalance
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 )
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