xW PA BCh 13 Spring 17xPMB Ch. 13 Spring 17(0 x Secure https//docs.google.com/do

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xW PA BCh 13 Spring 17xPMB Ch. 13 Spring 17(0 x Secure https//docs.google.com/document/d/1 TA3id3w gUIRJrTI mgo6JkcYAKgm2hJL.dpoHK. s9xs/edit A 8 Ch. 13 Spring 17 (1) . ile Edit View Insert Format Tools Add-ons Help All changes saved in Drive 10096 Normal text | Arial 5. TOPIC: External & Internal Respiration A. Define the processes of "external respiration" and "internal respiration". B. Which transport mechanism is responsible for the movement of oxygen and carbon dioxide during these processes? Is this transport mechanism passive or active? C. In this transport mechanism, respiratory gases always move from an area of concentration (pressure) to an area of concentration (pressure

Explanation / Answer

External respiration: This is defined as the exchange of oxygen and carbon dioxide between environment and body cells. This includes inhalation, exhalation and gaseous exchange in the lung alveoli and pulmonary capillaries.

Internal respiration: This is the metabolic process by which a cell produce energy from protein, carbohydrate and fats in the form of adenosine triphosphate. This includes glycolysis, Krebs cycle, oxidative phosphorylation.

B. Transport mechanism: The movement of oxygen and carbon dioxide occurs according to their concentration gradient as simple diffusion and there is no requirement of energy, so it is a passive process.

C. In this transport mechanism.......respiratory gases .... move from an area of High concentration .. to an area of Low concentration

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