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प्रश्न
Out of xylem and phloem, which one carries materials upwards as well as downwards?
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उत्तर
Phloem carries materials both upwards as well as downwards.
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संबंधित प्रश्न
What is the name of the extensions of the epidermal cells of a root which help in respiration?
Where does the blood absorb oxygen in the human body?
Draw a labelled diagram of the human respiratory system.
Why do the walls of trachea not collapse when there is less air in it?
Which of the following is not produced during anaerobic respiration in unicellular fungus?
An organism X having breathing organs A lives on land. When organism X goes underwater, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of the water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes, and rivers can survive on land as well as in water equally well.
(a) What could organism X be? Name the breathing organs A.
(b) What could organism Y be? Name the breathing organs B.
(c) What could organism Z be? Name the breathing organs C and D.
(d) Out of X, Y, and Z, which organism is (i) amphibian, (ii) aquatic, and (iii)
terrestrial?
Choose the odd one out in the following groups of four items each:
Diffusion, Respiratory gases, Alveoli, Capillary network
Name the body structure concerned with the given functional activity:
Prevents food from entering the trachea during swallowing.
Name the body structure concerned with the given functional activity:
Combines with the oxygen in the lungs.
Given below is an example of certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Epiglottis and _____________.
State one function of the following:
Pleural fluid
Define respiration.
The major fraction of CO2 released during cellular respiration is transported by the blood to the lung capillaries ______
What is the ppCO2 in alveolar air?
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
Match the correct answers with the type of respiration and respiratory substances.
| Respiration | Types of Substrates |
| A. Floating respiration | I. Proteins |
| B. Cytoplasmic respiration | II. Glucose |
| C. Protoplasmic respiration | III. Carbohydrates and fats |
Visit a doctor. Find out about artificial respiration. Ask the doctor:
- When does a person need artificial respiration?
- Does the person need to be kept on artificial respiration temporarily or permanently?
- From where can the person get supply of oxygen for artificial respiration?
