Qhov sib txawv tseem ceeb ntawm baroreceptors thiab chemoreceptors yog tias baroreceptors yog mechanoreceptors teb rau kev hloov ntshav siab thaum chemoreceptors yog cov hlwb uas hnov cov concentration ntawm cov tshuaj nyob rau hauv ib puag ncig cov kua dej extracellular.
Baroreceptors thiab chemoreceptors yog ob hom hlwb. Baroreceptors yog mechanoreceptors uas teb rau nce los yog txo cov ntshav siab los yog arterial stretch. Hauv cov lus yooj yooj yim, lawv hnov qhov txhais tau tias arterial siab. Hauv qhov sib piv, chemoreceptors teb rau qib oxygen, carbon dioxide, thiab pH. Txawm li cas los xij, ob qho tib si receptors pab txhawb nqa kev hloov pauv plawv. Ob leeg baroreceptor thiab chemoreceptor reflexes ua rau muaj kev cuam tshuam loj rau kev tswj hwm lub plawv thiab cov hlab ntsha.
Baroreceptors yog dab tsi?
Baroreceptor yog ib qho mechanoreceptor uas teb rau cov kev hloov hauv cov ntshav siab. Kev hloov ntshav siab tshwm sim raws li cov lus teb rau qhov kev hloov ntawm qhov nro lossis stretch ntawm phab ntsa ntawm cov hlab ntsha. Lawv pom nyob rau hauv carotid sinus thiab nyob rau hauv lub aortic arch. Baroreceptor hauv carotid sinus teb rau ob qho tib si nce / txo qis hauv cov hlab ntsha siab.
Daim duab 01: Baroreceptor Reflex
Baroreceptor nyob rau hauv lub aortic arch feem ntau teb rau kev nce siab hauv cov hlab ntsha. Baroreceptor reflex yog ib qho txheej txheem uas yog cov lus teb ceev ceev rau kev hloov ntshav siab. Nws sim ua kom cov ntshav siab tsis tu ncua. Carotid sinus reflex tswj cov ntshav siab hauv lub hlwb. Aortic reflex tswj cov ntshav siab systolic. Baroreceptor reflexes ua haujlwm nyob rau hauv ob qho tib si qhia.
Chemoreceptors yog dab tsi?
Chemoreceptors yog cov hlwb uas teb rau cov tshuaj hloov pauv hauv cov ntshav, tshwj xeeb tshaj yog cov tshuaj lom neeg hauv CO2, O2 thiab H + (pH). Thaum chemoreceptors pom qhov hloov pauv hauv CO2, O2 thiab H+, lawv xa impulses mus rau plawv plawv. Muaj ob hom chemoreceptors ua peripheral chemoreceptors thiab central chemoreceptors. Peripheral chemoreceptors nyob rau hauv carotid lub cev nyob rau hauv lub carotid sinus thiab aortic lub cev nyob rau hauv lub aortic arch. Central chemoreceptors nyob rau hauv lub medulla.
Daim duab 02: Chemoreceptor Reflex rau Hypoxia
Chemoreceptor reflex mediates lub tshuab ua pa teb rau hypoxia thiab hypercapnia. Hypoxia yog lub caij nplooj zeeg hauv arterial PO2 thaum hypercapnia yog qhov nce hauv arterial PCO2 Thaum chemoreceptor reflex tau qhib rau hauv cov xwm txheej zoo li no, lawv pab tswj. Kev ua pa ua pa kom tswj tau cov ntshav PO2, PCO2, thiab pH nyob rau hauv qhov tsim nyog physiological ntau yam. Txwv tsis pub, cov pa pauv tsis zoo hauv lub ntsws yuav txo qis cov hlab ntsha PO2 thiab pH thiab nce arterial PCO2
Dab tsi yog qhov zoo sib xws ntawm Baroreceptors thiab Chemoreceptors?
- Ob leeg baroreceptors thiab chemoreceptors yog cov hlwb.
- Thaum lub sijhawm ua haujlwm, ob qho tib si baroreceptors thiab chemoreceptors pab txhawb nqa kev hloov pauv plawv.
- Baroreceptor thiab chemoreceptor reflexes ua rau muaj kev cuam tshuam loj rau kev tswj hwm lub plawv thiab cov hlab ntsha, tshwj xeeb tshaj yog thaum muaj kev ntxhov siab.
- Ob leeg baroreceptors thiab chemoreceptors nyob hauv carotid sinus thiab koov ntawm lub aorta.
- Lawv xa impulses mus rau lub plawv plawv.
Qhov txawv ntawm Baroreceptors thiab Chemoreceptors yog dab tsi?
Baroreceptors yog mechanoreceptors uas teb rau cov ntshav hloov pauv thaum chemoreceptors yog cov hlwb puas hlwb uas teb rau cov tshuaj muaj pes tsawg leeg hloov pauv hauv cov ntshav. Yog li ntawd, baroreceptors saib xyuas cov hlab ntsha siab thaum chemoreceptors kuaj pom kev hloov pauv ntawm oxygen, carbon dioxide thiab pH hauv cov ntshav. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm baroreceptors thiab chemoreceptors. Tsis tas li ntawd, baroreceptors muaj nyob rau hauv carotid sinuses thiab aortic arch. Chemoreceptors muaj nyob rau hauv carotid thiab aortic lub cev thiab nyob rau hauv lub ventral nto ntawm lub medulla.
Ntxiv mus, baroreceptor reflex ua kom ntshav siab nyob rau hauv ib txwm muaj thaum chemoreceptor reflex khaws cov pa oxygen, carbon dioxide thiab pH qib hauv cov ntshav ib txwm muaj.
Hauv qab infographic qhia txog qhov sib txawv ntawm baroreceptors thiab chemoreceptors.
Summary – Baroreceptors vs Chemoreceptors
Lub paj hlwb tswj cov ntshav siab los ntawm baroreceptor thiab chemoreceptor reflex arcs. Baroreceptors yog cov hlwb uas saib xyuas cov kev hloov hauv cov ntshav siab. Hauv qhov sib piv, chemoreceptors yog cov hlwb uas ntsuas cov tshuaj muaj pes tsawg leeg hauv cov ntshav. Lawv teb rau cov kev hloov pauv hauv pH, O2 concentration thiab CO2 concentrations hauv ntshav. Ob hom receptors sim ua kom siab thiab tshuaj lom neeg muaj pes tsawg leeg hauv cov ntshav hauv ib txwm muaj. Yog li, qhov no qhia txog qhov sib txawv ntawm baroreceptors thiab chemoreceptors.
