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Physiology

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Respiration

Question
22 out of 33
 

Death due to cyanide poisoning results from which of the following types of anoxia? (DNB Dec-2008)



A Anoxic anoxia
B Anaemic anoxia

C Stagnant anoxia
D Histotoxic anoxia

Ans. D Histotoxic anoxia

Hypoxia or Anoxia O2 deficiency at the tissue level

Type:

1. Hypoxic Hypoxia (anoxic anoxic) a. PO2 of arterial blood Q

b. Chemoreceptor stimulated Q

2. Anaemic Hypoxia

a. Arterial PO2 is normal but amount of Hb available to carry O2 is reduced Q

b. Chemoreceptors are not stimulated, since dissolved O2 in blood is enough to keep these receptor normal. Q

3. Stagnant or ischemic hypoxia

a. Normal PO2 and Hb conc. Q

b. Blood flow to tissue is so slow that adequate O2 is not delivered Q

c. Chemoreceptor are strongly stimulated. Q

4. Histotoxic Hypoxia:-

a. Caused by Canide, that inhibit cytochrome oxidase (cyt aa3), so that tissue cells cannot make use of O2. Q

b. O2 delivery to tissue is normal. Q

c. Chemoreceptor are strongly stimulated. Q

Respiration Flashcard List

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