Life Processes Worksheet-20

Life Processes Worksheet-20

 

  1. Describe various types of leucocytes.

 

  1. Write a note on the importance of transpiration.

 

  1. Give an account on the different types of blood vessels.

 

  1. Give the function of kidney.

 

  1. What criteria do we use to decide whether something is alive?

 

  1. How is oxygen and carbon dioxide transported in human beings?

 

  1. What are the components of the transport system in human beings? What are the functions of these components?

 

  1. Describe the structure and functioning of nephrons.

 

  1. What are the necessary conditions for autotrophic nutrition and what are its by products?

 

  1. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.

 

  1. (a) Draw a diagram of human alimentary canal.

(b) Label Oesophagus, Liver, Pancreas and Gall bladder on the diagram drawn.

(c) What is the function of the enzyme 'pepsin' in the digestion process?

 

  1. (a) Draw a diagram of 'human alimentary canal'.

(b) Label the following on the diagram drawn: Oesophagus, Liver, Gall bladder, Duodenum.

(c) What is the function of liver in the human body?

 

  1. (i) Draw a diagram of the human urinary system and label in it :

(a) Kidney, (b) Ureter, (c) Urinary bladder, (d) Urethra

(ii) Name the two major components of normal human urine.

 

  1. Explain the process of 'photosynthesis' in plants. List four factors which influence this process and describe how each of them affects the rate of the photosynthesis process.

 

  1. List three differences between respiration in plants and respiration in animals. Describe with a labelled diagram how gaseous exchange occurs through root hair in plants.

 

  1. Define the terms 'nutrition' and 'nutrients'. List two differences between 'Holozoic nutrition' and 'Saprophytic nutrition'. Give two examples of each of these two types of nutrition.

 

  1. Draw a diagram of the 'human alimentary canal'. Label the following body parts on it

(i) Liver    (ii) Pancreas     (iii) Gall bladder

(iv) Duodenum Write one function each of the liver and the pancreas.

 

  1. (a) Explain why the rate of photosynthesis in plant is low both of lower and higher temperatures.

(b) Is green light most or least useful in photosynthesis and why?

(c) Describe an activity to show that chlorophyll is necessary for photo-synthesis in plants.

 

  1. How is 'respiration' different from 'breathing'? Explain the processes of 'aerobic' respiration and 'anaerobic' respiration.

 

  1. Draw a diagram showing 'human respiratory system'. Label its following parts :

(i) Larynx (ii) Trachea       (iii) Primary Bronchus      (iv) Lungs

Why do the walls of the trachea not collapse when there is less air in it?

 

  1. (i)  Name the blood vessel that brings oxygenated blood to the human heart.

(ii) Which chamber of human heart receives oxygenated blood?

(iii) Explain how oxygenated blood from this chamber is sent to all parts of the body.

 

  1. (i) Name the blood vessel that brings deoxygenated blood to the human heart.

(ii) Which chamber of the human heart receives deoxygenated blood?

(iii) Describe how deoxygenated blood from this chamber is sent to lungs for oxygenation.

 

  1. (i) State two structural differences between an artery and a vein.

(ii) Name a non-nucleated cell present in human blood and state one function of this cell.

(iii) Draw a labelled diagram of human heart.

 

  1. Name the main organs of the human digestive system in the order they participate in the process of digestion. Describe how digestion of carbohydrates and proteins take place in our body.

 

  1. Describe the internal structure of heart of man with the help of a well-labelled diagram.

 

  1. (i) Draw a labelled diagram of the respiratory system of human beings with diaphragm at the   end of expiration, and

(ii) List four conditions required for efficient gas exchange in an organism.

 

  1. How does the major nutrient in chapatis eaten by you in your food get digested and finally absorbed by the alimentary canal?

 

  1. How does the butter in your food get digested and absorbed in the body? Explain in detail.

 

  1. Describe the mechanism of breathing in human beings.

 

  1. Describe the process of digestion of food in man.

 

  1. Name the factors which affect photosynthesis.

 

  1. Describe the structure of the lungs.

 

  1. Explain various digestive glands present in man.

 

  1. Explain briefly the respiration in plants with a diagram.

 

  1. Explain with a schematic representation of the exchange of gases in tissues.

 

  1. What is blood? Describe it's composition.

 

  1. Give the differences between an artery and a vein.

 

  1. State differences between artery, vein and capillary.

 

  1. Write a note on lymphatic system in human beings stating two major functions of lymph.

 

  1. Briefly describe the mechanism of urine formation.

 

  1. Describe the procedure of opening and closing of stomata.

 

  1. Give the differences between blood and lymph.

 

  1. Draw the internal structure of the heart and explain how blood flows through the heart.

 

  1. Describe double circulation in human beings. Why is it necessary?

 

  1. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.