1
Central Chemoreceptors
Central Chemoreceptors
DATE: 2013/02/28::
2
Central and Peripheral Chemoreceptors (CO2 Detection)
Central and Peripheral Chemoreceptors (CO2 Detection)
DATE: 2012/06/06::
3
03   Breathing control   02   Central chemoreceptors
03 Breathing control 02 Central chemoreceptors
DATE: 2014/09/23::
4
Peripheral Chemoreceptors
Peripheral Chemoreceptors
DATE: 2013/03/02::
5
Altitude Adaptation of Central Chemoreceptors
Altitude Adaptation of Central Chemoreceptors
DATE: 2013/12/09::
6
03   Breathing control   01   Peripheral chemoreceptors
03 Breathing control 01 Peripheral chemoreceptors
DATE: 2014/09/23::
7
Central and Peripheral Chemoreceptors (PART2)
Central and Peripheral Chemoreceptors (PART2)
DATE: 2012/11/14::
8
Central chemoreceptors (5-2014) by Dr Khaled A Abulfadle
Central chemoreceptors (5-2014) by Dr Khaled A Abulfadle
DATE: 2014/05/03::
9
Центральные хеморецепторы
Центральные хеморецепторы
DATE: 2014/12/11::
10
The Respiratory Center
The Respiratory Center
DATE: 2013/03/03::
11
Cheyne-Stokes Respiration
Cheyne-Stokes Respiration
DATE: 2014/09/12::
12
Chemoreceptor Reflex Control of Blood Pressure [HD Animation]
Chemoreceptor Reflex Control of Blood Pressure [HD Animation]
DATE: 2014/03/05::
13
Shock 14, Neurological compensations in developing shock
Shock 14, Neurological compensations in developing shock
DATE: 2013/05/23::
14
The Respiratory System: Control of Breathing
The Respiratory System: Control of Breathing
DATE: 2013/04/17::
15
The Control of Breathing – Part 1
The Control of Breathing – Part 1
DATE: 2014/11/05::
16
Baroreceptor Reflex Control of Blood Pressure [HD Animation]
Baroreceptor Reflex Control of Blood Pressure [HD Animation]
DATE: 2014/03/05::
17
chemoreceptor control of breathing
chemoreceptor control of breathing
DATE: 2014/03/26::
18
Baroreceptors & Chemoreceptors of Heart
Baroreceptors & Chemoreceptors of Heart
DATE: 2013/02/18::
19
The role of chemoreceptors during pathophysiology
The role of chemoreceptors during pathophysiology
DATE: 2015/01/26::
20
The Role of Chemoreceptors in Breathing
The Role of Chemoreceptors in Breathing
DATE: 2014/11/08::
21
chemoreceptor
chemoreceptor
DATE: 2013/02/17::
22
Chemoreceptor Control of Breathing
Chemoreceptor Control of Breathing
DATE: 2014/04/11::
23
Chemoreceptors and copd
Chemoreceptors and copd
DATE: 2012/12/07::
24
chemoreceptors control of breathing
chemoreceptors control of breathing
DATE: 2014/03/26::
25
Regulation of blood pressure with baroreceptors
Regulation of blood pressure with baroreceptors
DATE: 2012/09/13::
26
Sensory_Taste&Smell w- Interpreter
Sensory_Taste&Smell w- Interpreter
DATE: 2014/07/02::
27
Peripheral chemoreceptors (4-2013) by Dr Khaled A Abulfadle
Peripheral chemoreceptors (4-2013) by Dr Khaled A Abulfadle
DATE: 2013/04/25::
28
Chemoreceptor Reflex Control of Blood Pressure
Chemoreceptor Reflex Control of Blood Pressure
DATE: 2014/06/30::
29
Chemoreceptors
Chemoreceptors
DATE: 2014/11/09::
30
Chemoreceptor Control of Breathing
Chemoreceptor Control of Breathing
DATE: 2014/11/09::
31
Baroreceptor Reflex Control
Baroreceptor Reflex Control
DATE: 2012/09/06::
32
Physiology of Vomiting
Physiology of Vomiting
DATE: 2013/08/19::
33
Control Of Respiration
Control Of Respiration
DATE: 2014/09/08::
34
Peripheral chemoreceptors and regulation of respiration (5-2014) by Dr Khaled A Abulfadle
Peripheral chemoreceptors and regulation of respiration (5-2014) by Dr Khaled A Abulfadle
DATE: 2014/05/02::
35
Earthworms / Cacing Tanah
Earthworms / Cacing Tanah
DATE: 2014/12/22::
36
Chemoreceptor Control of Breathing Final Project
Chemoreceptor Control of Breathing Final Project
DATE: 2014/03/28::
37
All About - Earthworm
All About - Earthworm
DATE: 2014/11/03::
38
End of Chapter 14
End of Chapter 14
DATE: 2014/11/04::
39
How To Pronounce Earthworm - Pronunciation Academy
How To Pronounce Earthworm - Pronunciation Academy
DATE: 2015/04/05::
40
How to Catch Worms for fishing with dish soap in your backyard! How to Fish channel
How to Catch Worms for fishing with dish soap in your backyard! How to Fish channel
DATE: 2013/06/04::
41
Sleep Apnea - Apnea del Sueno - Dr Romulo Guerrero
Sleep Apnea - Apnea del Sueno - Dr Romulo Guerrero
DATE: 2014/08/26::
42
Snoring
Snoring
DATE: 2014/09/09::
43
Jeffrey sounds like cow
Jeffrey sounds like cow
DATE: 2015/01/18::
44
An Earthworm walking
An Earthworm walking
DATE: 2014/08/15::
45
Earthworms: "The Earth Worm: A Classroom Picture" 1937 Edited Pictures
Earthworms: "The Earth Worm: A Classroom Picture" 1937 Edited Pictures
DATE: 2013/12/08::
46
Sleep Update
Sleep Update
DATE: 2015/01/17::
47
Taiwan ..蚯蚓..蚯蚓在中藥裡叫[地龍]....Earthworm...Regenwürmer..Lombrics..
Taiwan ..蚯蚓..蚯蚓在中藥裡叫[地龍]....Earthworm...Regenwürmer..Lombrics..
DATE: 2013/05/17::
48
How to Pronounce Chemoreceptors
How to Pronounce Chemoreceptors
DATE: 2014/01/28::
49
Baroreceptors mnemonic
Baroreceptors mnemonic
DATE: 2014/01/06::
50
27) Dr.Hani 23/04/2014 [ Ch.6 : nervous regulation of arterial blood pressure]
27) Dr.Hani 23/04/2014 [ Ch.6 : nervous regulation of arterial blood pressure]
DATE: 2014/04/25::
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RESULTS [51 .. 101]
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Central chemoreceptors of the central nervous system, located on the ventrolateral medullary surface in the vicinity of the exit of the 9th and 10th cranial nerves, are sensitive to the pH of their environment.

These act to detect the changes in pH of nearby cerebral spinal fluid (CSF) that are indicative of altered oxygen or carbon dioxide concentrations available to brain tissues. An increase in carbon dioxide causes tension of the arteries, often resulting from increased CO2 intake (hypercapnia), indirectly causes the blood to become more acidic; the cerebral spinal fluid pH is closely comparable to plasma, as carbon dioxide easily diffuses across the blood/brain barrier.

However, a change in plasma pH alone will not stimulate central chemoreceptors as H+ are not able to diffuse across the blood–brain barrier into the CSF. Only CO2 levels affect this as it can diffuse across, reacting with H2O to form carbonic acid and thus decrease pH. Central chemoreception remains, in this way, distinct from peripheral chemoreceptors.

The central chemoreception system has also been shown experimentally to respond to hypercapnic hypoxia (elevated CO2, decreased O2) and aqueous sodium cyanide injection into the whole animal [1] and in vitro slice preparation. These methods can be used to mimic some forms of hypoxic hypoxia and they are currently being studied including the detection of variation in arterial CO2 tension acting as a quick-response-system for short term (or emergency) regulation.

This system utilizes a negative feedback system, therefore if the pH of the cerebral spinal fluid does not compare to an ideal “set” level, then the receptor will send an error signal to the effectors and appropriate action may be executed.

Peripheral chemoreceptors (carotid and aortic bodies) and central chemoreceptors (medullary neurons) primarily function to regulate respiratory activity. This is an important mechanism for maintaining arterial blood pO2, pCO2, and pH within appropriate physiological ranges. For example, a fall in arterial pO2 (hypoxemia) or an increase in arterial pCO2 (hypercapnia) leads to an increase in the rate and depth of respiration through activation of the chemoreceptor reflex. Chemoreceptor activity, however, also affects cardiovascular function either directly (by interacting with medullary vasomotor centers) or indirectly (via altered pulmonary stretch receptor activity). Respiratory arrest and circulatory shock (these conditions decrease arterial pO2 and pH, and increase arterial pCO2) dramatically increase chemoreceptor activity leading to enhanced sympathetic outflow to the heart and vasculature via activation of the vasomotor center in the medulla.

See also[edit]

References[edit]

  1. ^ Solomon IC, Edelman NH, Neubauer, JA. Pre-Bötzinger complex functions as a central hypoxia chemosensor for respiration in vivo. J Neurophysiol. 83(5):2854-68, 2000.

External links[edit]

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