baroreceptor
Vascular pressure detector
A baroreceptor is a sensory nerve ending that detects changes in blood pressure.
These receptors, located mainly in the walls of major arteries near the heart, signal the brain to adjust heart rate and blood vessel diameter, helping maintain stable blood pressure: The baroreceptors sensed the sudden drop when she stood up too quickly.
Arterial baroreceptor at throat
- aortic archCurved section of main artery
- mechanoreceptorSensory cell for pressure
- nerve endingNeural tissue detecting stimuli
- carotid bodyVascular chemoreceptor cluster
Conveying toward central point
- vagus nerveMajor parasympathetic cranial pathway
- medulla oblongataLower brainstem structure
- neural pathwaySignal route between neurons
- nerve impulseElectrical signal through neurons
Self-modifying cyclical process
- efferentConveying outward from center
- sympatheticFeeling others' emotions
- parasympatheticNerve system promoting rest
- heart rateCardiac contractions per minute
vasoconstriction · vasodilation · autonomic · reflex arc · gain · buffering
Pull to extend
- transductionSignal or energy transformation
- depolarizationLoss of electrical gradient
- action potentialNeuron's rapid electrical discharge
- sensitivityResponsiveness to stimuli
threshold · adaptation · resetting · compliance · distension
Of heart contraction
- diastolicHeart's filling phase
- hypertensionChronic elevated arterial pressure
- hypotensionAbnormally reduced arterial pressure
- cardiac outputBlood volume heart moves
circulation · tachycardia · bradycardia · heart rate variability
Biological internal stability maintenance
- negative feedbackResponse indicating problems
- autoregulationIntrinsic flow homeostasis mechanism
- compensationPayment for services rendered
- modulationVarying signals to transmit
Loss of nerve supply
- hypertension treatmentCare for elevated arterial pressure
- syncopeTemporary loss of consciousness
carotid sinus
Arterial baroreceptor at throat
- aortic archCurved section of main artery
- mechanoreceptorSensory cell for pressure
- nerve endingNeural tissue detecting stimuli
afferent
Conveying toward central point
- vagus nerveMajor parasympathetic cranial pathway
- medulla oblongataLower brainstem structure
- neural pathwaySignal route between neurons
feedback loop
Self-modifying cyclical process
- efferentConveying outward from center
- sympatheticFeeling others' emotions
- parasympatheticNerve system promoting rest
heart rate · vasoconstriction · vasodilation · autonomic · reflex arc · gain · buffering
stretch
Pull to extend
- transductionSignal or energy transformation
- depolarizationLoss of electrical gradient
- action potentialNeuron's rapid electrical discharge
sensitivity · threshold · adaptation · resetting · compliance · distension
systolic
Of heart contraction
- diastolicHeart's filling phase
- hypertensionChronic elevated arterial pressure
- hypotensionAbnormally reduced arterial pressure
cardiac output · circulation · tachycardia · bradycardia · heart rate variability
homeostasis
Biological internal stability maintenance
- negative feedbackResponse indicating problems
- autoregulationIntrinsic flow homeostasis mechanism
- compensationPayment for services rendered
denervation
Loss of nerve supply
- hypertension treatmentCare for elevated arterial pressure
- syncopeTemporary loss of consciousness
baroreceptorchemoreceptor
Sensory unit detecting chemicals
thermoreceptor · photoreceptor · mechanoreceptor · proprioceptor · oxygen sensor