Life Processes. 3.Why do the walls of trachea do not collapse when there is less air in it?

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Marilyn Anderson
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1 Assignment -1: Life Processes 1.The leaves of a plant first prepare Food A by photosynthesis then food A gets converted into Food B What are A and B? 2.What will happen to a plant if its xylem is removed? 3.Why do the walls of trachea do not collapse when there is less air in it? 4.Where is pyruvic acid converted into lactic acid during the deficiency of oxygen in tissues of human being? 5.Where does oxygen come from when it is liberated during photosynthesis? 6.If salivary amylase is lacking in saliva which event in the mouth cavity will be affected? 7.Name the organ that performs the following functions in humans a)absorption of digested food b)excretion of nitrogenous waste 8.How does respiration occur in the leaves? 9.What are the common features of all respiratory organs? 10.What is the role of guard cells in transpiration?

2 Assignment-2: Life processes-respiration 1.Why is the rate of breathing in aquatic organisms is much faster than in terrestrial organisms? 2.All plants give out oxygen during day and carbon-dioxide during night? Do you agree with this statement? Give reasons. 3.In each of the following situations what happens to the rate of photosynthesis: a)no rainfall in the area. b)good manuring in the area. c)stomata gets blocked due to dust. 4.Distinguish between breathing and respiration. 5.Leaves of a healthy potted plant were coated with Vaseline to block the stomata. Will the plant remain healthy for long? State 3 reasons for your answer. 6.When and where is the energy currency produced in living organisms? 7.Discuss the role of diaphragm in breathing? 8.Name the respiratory pigment in human being and discuss its role. 9.Differentiate respiration in plants and animals. 10.How does exchange of gases occur in alveoli?

3 Assignment-3: Transportation 1.Explain the statement double circulation is necessary in human beings. 2.What happens if the conducting tubes of the circulatory system develops a leak? State in brief how this could be avoided? 3.Explain the formation and function of lymph? 4.Why is separation of oxygenated and deoxygenated blood is necessary in birds and mammals? 5.Diffusion will not be sufficient to provide raw materials in leaves and energy in roots of plants. Therefore a proper transportation system is essential.explain. 6.Write the components of transport system in human beings and mention their functions. 7.How is food transported in plants? 8.Why and how does water enter continuously into the root xylem? 9.Differentiate blood and lymph. 10.Differentiate arteries and veins.

4 Assignment 4 Excretion. 1. How does excretion occur in a unicellular organism like amoeba? 2.What are the parts of human excretory system? 3.How are the nephrons designed to produce urine? 4.Explain glomeular filtration. 5.Write the functions of a)ureter b)urinary bladder c)urethra 6.What is hemodialysis? 7.Mention the factors that lead to kidney failure. 8.Explain the working of a artificial kidney. 9.How do plants excrete the waste? 10.What are the substance that are reabsorbed from the initial filtrate?

5 Assignment 5 Control and co-ordination 1. Why do we associate visible movements with life? 2. Touching a hot object is an urgent and dangerous situation for us A) How is the information detected? B) How do we respond? 3. What are receptors? What is their role in nerve impulse transmission? 4. Block your nose by pressing it between your thumb and index finger and eat sugar. Can you indentify the taste? Explain 5. List three ways in which neurons are similar to other cells. 6. What is a synapse? What happens at the synapse of a person who lack chemicals in the nerve endings? 7. Explain why the tongue can be considered to be a receptor and an effector organ. 8. When the receptors do not work properly it may lead to some problems Explain with a suitable example from your experience. 9. What is the junction between a neuron and muscle called as? Make a neat labeled diagram of the same. 10. What is the need for a system of control and co-ordination in an organism?

6 Assignment-6 Control and Co-ordination 1. I jumped out of the way of the bus reflexly. I was so hungry my way mouth started watering reflexly. In the above examples, is thinking involved? Then how do we respond? 2. What will happen if thinking is involved in dangerous or emergency situation? 3. What is reflex action? Do we respond to reflex action in all our daily situations? 4. Why do animals have reflex arc? 5. Make a neat sketch of reflex arc. Label the following parts and mention their function. A)Receptors in skin B) Relay neuron C) Effector 6. I pulled my hand back from the flame reflexly - What is the role of brain in this reflex action? 7. Which signals get disrupted in case of spinal cord injury? 8. Which is the faster Thinking or reflex action? Why? Explain

7 Assignment 7 Control and Co-ordination 1. What are the two ways in which nervous system communicates with the muscle? 2. How is central nervous system connected to other parts of the body? 3. The teacher instructs Ravi to pick up a book from the floor. In this situation- A)Name the receptors that receive information B)Which part of the brain is involved C)List the events in the correct sequence 4. Brain is a delicate organ that sits inside a bony box (A). It continues as (B) on the dorsal side.(b) is protected by(c). Name A,B,C 5. How do we detect the smell of incense stik? 6. After a meal, How do we know that we have eaten enough? 7. In voluntary/involuntary/reflex action, muscles tissue do the final job- Explain 8. Is reflex action the only function of the spinal cord? 9. What is the function of the midbrain? 10. Categorise the following voluntary/involuntary/reflex action A)salivation B)clapping at the end of a programme C)digestion of food D)vomiting E)walking in a straight line F)salivation at the sight or smell of food G)moving a chair H)Talking I)Blood pressure J)Riding a bicycle K)Picking up a pen L)Change in the size of the pupil M)Eating food N)Breathing

8 Assignment 8 Control and Co-ordination 1)What are phytohormones? Name any two phytohormones. 2)Differentiate between tropic and nastic movements of plants. 3)What are hormones? Name the hormone secreted by thyroid and state its function. 4)What is phototropism? Describe an activity to demonstrate phototropism. 5)What is nastic movements? Give one example. 6)Describe how auxins are related with the bending of shoots towards the source of light? 7)Define a gland. What are the three kinds of glands? 8)Define tropism? What are different type of tropism? 9)Which plant hormone promotes the dormancy in seeds and buds and thus inhibits growth? 10)Mention the role of each of the following plant hormones. a)auxin b)abscisic acid

9 Assignment 9 Control and Co-ordination 1)What are nastic movements in plants? Explain what happens when we touch leaves of Touch me not plant and why this happens? 2)Name the two hormonal secretions of pancreas. How these regulate blood sugar level in the body? 3)Give reason why movements in plants are not as apparent as in case of animals. 4)What is hydrotropism? Describe an experiment to demonstrate hydro tropism. 5)State one function of each of the following a)thyroxin b)insulin 6)Give reason Pituitary is often termed as master endocrine gland 7)Give reason Pancreas is categorized as heterocrine gland 8)Give reason Adrenals are known as gland of emergency 9)Name any two example of cerebral reflex.

10 Assignment 10 Control and Co-ordination 1)Which hormone helps in lowering the level of blood glucose in human being? 2 Write the function of thyroxin hormone in our body. 3)What are plant growth promoters and plant growth inhibitors? Give examples 4)Mention the various phytohormones. 5)How does control and coordination takes place in plants? 6)What is phototropism? 7)What is geotropism? 8)Write the functions of testosterone. 9)Write the functions of estrogen.

Revision Question Bank. MCQs [Practical Based Questions]

Revision Question Bank. MCQs [Practical Based Questions] Revision Question Bank 1. What are phytohormones? 2. Name the part of hindbrain which takes part in regulation of respiration. 3. We suddenly pull our hand when a pin pricks. Name the type of response