The sensibitity of central chemoreceptor to H＋is about 25 times of that of peripheral chemoreceptor.

中樞化學(xué)感受器對H＋的敏感性約為外周化學(xué)感受器的25倍乱人伦中文视频在线一区二区三区。

The sensibitity to CO2 is higher than that to peripheral chemoreceptor.but the latent period of reaction to sudden change of PCO2 in the arterial blood is longer than that of the peripheral chemoreceptor.

cav小草。 對CO2的敏感性卻比外周化學(xué)感受器高av一本大道香蕉大在线app，但它對動脈血中PCO2的突然改變所引起的反應(yīng)的潛伏期卻比外周感受器長美女被插高潮到爽。

Hypoxia stimulation act through peripheral chemoreceptor.if the inputing of peripheral chemoreceptor is cut, the stimulation effect disappear.

a。 缺氧刺激是通過外周化學(xué)感受器起作用的黄片乱广一。若切斷外周化學(xué)感受器的傳入久久伊人av无码毛片，其刺激作用完全消失。

The main pathway is acting directly on peripheral chemoreceptor and inputting impulse.respiration center is excited.

主要是直接作用于外周化學(xué)感受器小伙子操逼的黄片毛片毛片，傳入沖動影音先锋zyz。呼吸中樞呈興奮作用。

In section of control of ventilation, students will learn respiration centers (medullary center, apneustic center, pneumotaxic center), and are required to master pulmonary stretch reflex (Hering-Breuer reflex), to understand other respiratory reflexes, to master the site and features of central chemoreceptor

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The effective stimulating sites were indentified by defensive cardiovascular response and other components of defence reaction evoked by 3 s trains of rectangular cathodal pulses (100Hz, 0.5ms pulse duration, 70 -150μA intensity for dPAG and 150-250μA for PF) delivered from a programmed multichannel constant current stimulator. The responses included an increase in blood pressure and heart rate, pupillodilation and an increase in the rate and depth of respiration. Currents of 1Hz, intensity of 100- 150μA for dPAG and 200-250μA for PF were used to observe the effect of the stimulation of them on RVLM neurones. The deep peroneal nerve and superfacial deep peroneal nerve were carefully separated, and put on a pair of stimulating electrode respectively, Both nerves were stimulated with constant rectangular pulses of 1Hz, 0.5ms duration and 300μA current intensity to see their effects on RVLM neurones. The baro-and chemo-receptors were activated by the intravenous injection of phenylephrine or 0.208 M NaH2PO4. The degree of convergent inputs to individual RVLM neurone was studied by the stimulation of the sites mentioned above. It was found that neurones about 61.4%(27/44) and 35.3%(6/17) received convergent inputs from three and four places respectively.

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The pressor effect of adenosine was due to carotid body cheoreceptor activation. However, a slight increase of ABP induced by intracarotid bolus injection of adenosine following the section of carotid sinus nerves was observed in a few rats, which implied that the central effect might be involved in the pressor effect of adenosine. The delayed effect of adenosine may be attributed to the direct actions (including the negative chronotropic action, thenegative dromotropic action, the negative inotropic action and the vasodilator effect) of adenosine on the heart and blood vessels.

前一效應(yīng)主要與頸動脈體化學(xué)感受器的激活有關(guān)97在线超级对对碰免费，但在少數(shù)動物欧美爱性真人在线视，頸動脈內(nèi)注射腺苷的升壓效應(yīng)在切除竇神經(jīng)后并未完全消除，表明腺苷有可能進入神經(jīng)中樞而發(fā)揮作用8×8x永久华人免费网址入口；后一效應(yīng)可能由腺苷直接作用于心臟和血管啪啪啪试看乱码，通過其負(fù)性變力国产168页视频、變時、變傳導(dǎo)和血管擴張等作用网站大全色网站，導(dǎo)致心臟自律性降低国产操逼免费看，輸出量減少和外周阻力下降。

As the bridge between central nervous system and peripheral receptor or effector, peripheral nerve plays an important role in neurotransmission and neurotrophy.

周圍神經(jīng)作為聯(lián)系中樞神經(jīng)系統(tǒng)(central nervous system人人人色人人在线视频，CNS)與外周感受器或者效應(yīng)器之間的橋梁国产啪精品视频网站，在神經(jīng)傳遞、神經(jīng)營養(yǎng)等方面發(fā)揮著重要作用www.99riav.1vip。

All these data indicated that in small DRG neurons, VR1-involved peripheral mechanism plays an important role in activation of nociceptor and peripheral analgesia by neomycin.

研究提示VR1受體參與的外周機制在傷害性感受器的激活和新霉素的鎮(zhèn)痛效應(yīng)中可能起重要作用欧美性爱三级影片免费在线看网站。

In the central, 5-HT can induce the release of inhibitory neurotransmitter γ-aminobutyric acid etc. through 5-HT2A receptor resulting in analgesia. In the peripheral, 5-HT can active the nociceptor and advance the traumatic information transmission.

在中樞可以通過2A受體引起抑制性神經(jīng)遞質(zhì)γ-丁氨酸等的釋放，從而發(fā)揮鎮(zhèn)痛作用一级毛片91网站十年网站；在外周參與傷害性感受器的活化黄色生活片黄色生活片操逼片，促進傷害性信息的傳遞。