Tag: gas exchange in humans

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Multiple choice biology human system gas exchange and smoking gas exchange gas exchange in humans

Respiration is the physiological process in which

  1. Breathing occurs

  2. Breathing and external respiration occurs

  3. Breathing, external respiration and cellular respiration occurs

  4. Only inspiration occurs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Physiological respiration is the complete process of respiration which includes physical and biochemical pathway. In physical pathway, there is an exchange of gasses that takes place with the help of respiratory organ i.e., lungs. In biochemical pathway, cells are involved where oxidation of food i.e. glucose takes place in mitochondria and cytoplasm in the presence of several respiratory enzymes. 

So, the correct answer is option C.

Multiple choice biology human system gas exchange and smoking gas exchange gas exchange in humans

Fish brought out of water dies because of.

  1. Absence of pressure

  2. Inability of respire

  3. Inability to feed

  4. Rise in temperature
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fish brought out of water die due to inability to respire. Fish gills are specialized for extracting oxygen from water and cannot effectively extract oxygen from air. The gills collapse and dry out outside water, making gas exchange impossible.