Hypoxia and Medicine

I have a question about the respiratory system could you help me?

question 1: how does internal respiration differ from external respiration? question 2 outline the path of oxygen from the atmosphere to the bloodstream. question3 differentiate between oxygen transport and carbon dioxide transport in the blood stream. question 4 predict the effect that increasing altitude would have on a blood oxygen saturation. question 5 why does a single celled organism not need a respiratory system?

Public Comments

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2. 1: Internal refers to respiration occuring in cells where they breakdown oxygen and a reaction occurs to release CO2, external respiration is the exchange of oxygen and carbondioxide between the lungs and the environment. 2: atmosphere->bronchus->bronchioles->alveoli->capillary->heart->bloodvessels->tissues->cells 3: oxygen is carried inside the red blood cells mainly, via the haemoglobin molecules. carbondioxide is carried, partially by being disslved in the blood to form hydrogen ions, and bicarbonate ions. it is only partially carried inside the red blood cells 4:increasing altitude leads to decreased oxygen saturation due to decreased availability of oxygen in the air. as altitude increases, partial pressure of oxygen decreases 5: a single celled organism can directly carry out gas exchange with the surroundings. on the other hand, multicellular oranismns need respiratory systems as their cells are not directly open to the surroundings.
3. 1. internal - gaseous exchange in our body external- gas exchange with environment 2. nose trachea broncus bronchiole alveoli red blood cell 3. o2 transport is mostly by haemoglobin. co2 mostly as hco3- in plasma(70%) . also as a gas dissolved in plasma (10%). it does also bind to haemoglobin but it binds directly to the amino acids of the globin chain( o2 bind to heme) 5. diffusion is enough. it has a large surface area