Advertisements
Advertisements
प्रश्न
Give Suitable Explanation for the Following :
Why do you shiver and why do your teeth chatter when it is very cold in winter?
उत्तर
In order to maintain the body temperature constant in very cold conditions in winter, heat production is increased by enhanced metabolic rate and increased muscular activity. Shivering and chattering of teeth involves a lot of muscular activity. That is why we shiver and our teeth chatter in winter in order to increase heat production in the body.
APPEARS IN
संबंधित प्रश्न
The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in ______.
What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
What is the other name of wind-pipe?
State whether the following statement is true or false:
during respiration, the plants take CO2 and release O2.
Fill in the Following Blank with Suitable Word.
_________ In the Lungs Provide a Very Large Surface Area for Gaseous Exchange.
Explain why, a land plant may die if its roots remain waterlogged for a long time.
Fill in the following blank with suitable word:
Gills are the breathing organs in ___________.
What is meant by aquatic animals and terrestrial animals?
Why do the walls of trachea not collapse when there is less air in it?
During respiration, the exchange of gases takes place in:
Internal respiration may be defined as:
The two organisms which breath only through their moist skin are:
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
One of the following organisms does not depend on the simple diffusion of gases for breathing and respiration. This organism is:
Which of the following is most likely to have a much higher breathing rate?
Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a) What could be (i) X, (ii) Y, and (iii) Z?
(b) What is the process of converting sugar into substance Y by the action of X known as?
(c) What type of respiration is exhibited by X in the above process?
In the lungs what substance is removed from the body?
Answer the following in one word.
What is the muscular sheet below the lungs called?
Choose the odd one out in the following groups of four items each:
Diffusion, Respiratory gases, Alveoli, Capillary network
Choose the odd one out in the following groups of four items each:
Trachea, Ciliated epithelium, Mucous, Diffusion
State one function of the following:
Mitochondria
Given below is an overall chemical reaction of a certain process:
C6H12O6 →LacticAcid+2ATP+Heat energy
Name the process.
Given below is an overall chemical reaction of a certain process:
C6H12O6→LacticAcid+2ATP+Heat energy
Is this reaction applicable to animals or to plants or to both animals and plants?
With regard to the respiratory system and the process of respiration in man, answer the following question:
What is meant by :
- Residual air and
- Dead air space
List the organs of Human respiratory system.
Air that enters through the nose passes into this tube.
______ refers to the physical process by which gaseous exchange takes place between the atmosphere and the lungs.
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
Which is the correct sequence of air passage during inhalation?
