Life Processes Worksheet-18

Life Processes Worksheet-18


  1. Describe the mechanism of blood clotting.


  1. Draw a diagram of the front view of human heart and label any six parts including at least two, that are concerned with arterial blood supply to the heart muscles.


  1. Differentiate between photosynthesis and respiration.


  1. How does intestinal juice contribute to the digestion of proteins? What provides an alkaline pH in the small intestine?


  1. Name any three enzymes secreted by pancreas. Specify the substrate and the product of each.


  1. Describe the structure and the main digestive function of liver.


  1. Draw a labelled diagram of a portion of human alimentary system showing the location of liver, pancreas and gall bladder and their associated ducts.


  1. Draw a diagram of human alimentary canal starting from stomach and ending at anus. Label any six parts.


  1. Draw a diagram to show the internal structure of human heart. Label six parts in all including at least three valves


  1. Explain why photosynthesis is considered the most important process in the biosphere.


  1. Draw a diagram of the vertical section of human heart to show the internal structure. Label any one of the heart chambers and any other five parts.


  1. How does liver serve both as a digestive as well as an excretory organ?


  1. Draw a labelled diagram of the detailed structure of a nephron.


  1. How do plants obtain food? What are the two phases of photosynthesis?


  1. Name the organelle in which photosynthesis occurs. Discuss the role of chlorophyll in photosynthesis.


  1. Describe the process of nutrition in Amoeba.


  1. State the difference between breathing and respiration.


  1. Give three points of distinction between aerobic and anaerobic respiration.


  1. What are stomata and lenticels? What is their role in respiration?


  1. What happens to the rate of breathing during vigorous exercise and why?


  1. Describe the stages involved in the process of respiration in mammals.


  1. Differentiate between tracheoles and bronchioles.


  1. Bring out the differences between inspiratory and expiratory muscles.


  1. What are the different salivary glands present in man? Mention their main functions.


  1. How does gaseous exchange take place in Amoeba?


  1. Describe the difference between nutrition in plants and animals.


  1. How does gaseous exchange take place in fish?


  1. Describe the structure of chloroplast with a diagram.


  1. Distinguish between intracellular and extracellular digestion.


  1. With a schematic diagram explain the overall process of respiration.