Answer the following Questions :-
1. What role does oxygen play during respiration?
2. What is the importance of epiglottis to man?
3. Describe how the oxygen of the air reaches the blood in our lungs.
4. In what way is aerobie respiration better then anaerobic respiration?
5. What role do hairs perform in the nostrils?
6. How do plants exchange gases with the atmosphere?
7. What is the significance of respiration to a living organism?
8. What are the two steps involved in respiration?
9. In what way is respiration different from breathing?
10. What is anaerobic respiration?
Answer all the question?
Answers
ANswer :
➫1. Oxygen helps in the breakdown of glucose in order to produce energy (or ATP) along with carbon dioxide during cellular respiration.
➫2. Epiglottis is a flap-like structure which helps in preventing food from entering into the wind pipe.
➫3. The steps involved in the reaching of oxygen from air to lungs are as follows:-
• The first step is the inhalation. During inhalation the atmospheric pressure in our body decreases in comparison to atmospheric pressure around us. Hence, the air rushes into the body through nostrils.
• Then the debris present in the air gets cleaned by the nasal hair.
• Then the oxygen reaches lungs via wind pipe.
• Then through diffusion the oxygen enters into the blood.
➫4. In aerobic respiration the complete breakdown of glucose takes place. Hence, the number of ATPs formed during aerobic respiration is more. While in anaerobic respiration partial breakdown of glucose takes place. Hence, the number of ATPs formed during anaerobic respiration is very less.
➫5. The nasal hair prevents the debris away from our body. While inhalation not only air but also dust present in the air can enter into our body. The hair present in nostrils prevents them from entering into our body.
➫6. The gaseous exchange in plants occur through stomata. The mechanism of stomata goes like this:-
• Stomata is supported by two guard cells which plays a vital role in exchange of gases.
• Guard cells becoming turgid leads to opening or the aperture. When the guard cells open, the oxygen is released into the air.
• Similarly Flaccidity of guard cells leads to the closing of the aperture.
➫7. Respiration is a process in which energy is released. The glucose is broken down using oxygen which leads to the production of energy (ATP) along with carbon dioxide. This energy is essential for us to do work.
➫8. The two steps involved in respirations are as follows:-
• The glucose carried by the blood on entering the cytoplasm gets reduced to pyruvate.
• This pyruvate then reaches mitochondria where it is further broken and the cellular respiration takes place.
➫9. Respiration is the process through which energy is produced. While breathing is the first step of respiration. Breathing is the exchange of gas between an organism and the atmosphere around it.
➫10. Anaerobic respiration is the process which occurs in the absence of oxygen.
This is mainly seen in yeast and in muscle cells of human being in the lack of oxygen.