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NCERT Solutions for Class 10 Science Chapter 7 updated for PDF

Candidates can find everything about control and coordination class 10 extra questions with answers in this article. Cchapter answer to each and every question in class 10 science chapter 7 notes is chapted along 1th complete, step-wise solutions for candidates better understanding. This will further help candidates in their home assignments and as well as practice sessions. Read on to find everything about Control and Coordination Class Question 2 What happens at the synapse between two neurons?

Answer: The small empty space between two nerve cells is called synapse. At synapse, a chemical substance is produced at the end of axon of one nerve cell that reaches to the other nerve cell class 10th science chapter 7 ncert solutions 2?? the dendrite.

Thus, information is transmitted from solutione nerve cell to other nerve cell by synapse. Question 3 Which part of the brain maintains posture and equilibrium of the body? Answer: Posture and equilibrium chspter the body are controlled by cerebellum.

Question 4 How do we detect the smell of an agarbatti incense stick? Answer: The smell of agarbatti incense stick diffuses in the air. It is detected by olfactory receptors present in the nose. This information is sent to olfactory lobe by sensory nerves located in the forebrain.

It responds to the information. Solutionns 5 What is the role of solytions brain in class 10th science chapter 7 ncert solutions 2?? action? Answer: There is no role of brain in claas action. These involuntary actions are controlled by the spinal cord which take place immediately without thinking of how to respond to the stimuli.

Question 1 What are plant hormones? Answer: Plant hormones are also called phytohormones. Plant hormones are the chemical substances which help in controlling growth, flowering, height, development of plants and their response to the environment. Different types of phytohormones are � auxins, gibberllins, cytokinins, abscisic acid and ethylene.

Question 2 How is the class 10th science chapter 7 ncert solutions 2?? of leaves of the sensitive plant different from the movement of a shoot towards light? Question 4 How do auxins promote the growth of a tendril around a support?

Answer: When the tip of a tendril touches a support, then the auxins present in its tip move to that side of tip which is away from the support. Auxins promote growth. So, due to more auxins in it, the side of tendril away from the support grows faster and becomes longer than the side which Class 10th Science Chapter 3 Ncert Solutions Pdf is in contact with nceert support and makes the tendril twirl or bend around the support.

Question 5 Design an experiment to demonstrate hydrotropism. Answer: Take two glass troughs A and B and fill each one of them two-thirds with soil. In trough A plant a tiny seedling. Water the soil in trough A daily and uniformly. Do not water the soil in trough B but put some water in the clay pot. Leave both the troughs for a few days. Now, dig up the seedlings carefully from both the troughs without damaging their roots. We will find that the root of seedling in trough A ncerg straight.

On the other hand, the root of seedling in trough B is found to be bent to the right side i. Wolutions trough A, the root of the seedling csience water from both sides. But in trough Class 10th science chapter 7 ncert solutions 2??, the roots get water oozing out from the clay pot which is kept on the right. Therefore, the root of seedling in trough B grows and bends towards the source of water to the right. Sciencr experiment shows that the root of a plant grows towards water.

In other words, the root of a plant is hydrotropism. Question 1 How does chemical coordination take place in animals? Answer: Chemical coordination in animals takes place through the hormones secreted by the endocrine glands. Coordination in animals takes place through hormone system as well as nervous system which is called endocrine. Endocrine glands secrete animal hormones directly into the blood that reach to the specific cells.

Special type of molecules are present on the surface of cells to detect these hormones. These cells act according to the information that a particular hormone carries. Question 2 Why is the use of iodised salt advisable? Answer: It is advised to 10fh iodised salt because thyroid chalter needs iodine to produce thyroxin hormone.

Thyroxin hormone controls all the metabolic activities of our body like metabolism of carbohydrates, fats and protein. Due to the deficiency of thyroxin a disease called goitre is caused. Question 3 How does our body respond when adrenaline is secreted into the blood?

Answer: The heart beat increases when adrenaline is secreted into the blood so that more oxygen is supplied to our muscles. The blood supply to the digestive system and skin decreases because the small arteries around the muscles of these organs contract.

This turns the direction of blood towards wcience skeletal muscles. The breathing rate also increases due to the contractions of the diaphragm chapher rib muscles. All these responses enable us to face the situations of fear and anger.

Question 4 Why are some patients of diabetes treated by giving injections of insulin? Answer: Insulin hormone regulates blood sugar levels. If this is not secreted in proper amounts, the sugar level in the blood rises. This causes many harmful effects. To treat harmful effects of increased level of blood sugar, the diabetic patients are treated by giving injections of insulin. Question 1 Which of the following is a plant hormone?

Question 2 The gap between two neurons is called a a dendrite b synapse c axon d impulse Answer: b Synapse. Question 3 The brain is responsible for a thinking b regulating the heart beat c balancing the body d all of the above Answer: b All of the.

Question 4 What is the function of receptors in our body? Sciencce of situations where receptors do not work properly. What problems are likely to arise? The function of receptors class 10th science chapter 7 ncert solutions 2?? to detect information from the environment. Sciencce example, olfactory receptors detect smell.

If receptors do not work properly, the information obtained from the environment will be delayed to reach the spinal cord or brain.

In this situation, the response to the environmental stimulus will be delayed solutoons harm to the body. Question 5 Draw the structure of a neuron and explain its function.

A nerve cell has three parts- i cell body ii dendrite iii axon Function : The function of nerve cells is to carry information in the form of electrical signals which are called nerve impulses. Cells receive stimulus to send it to spinal cord and brain and carry the message from brain to the target organ.

Question 6 How does phototropism occur in plants? Answer: The movement in any part of a cnapter due to light is called phototropism. The shoot of plant shows positive 10ht and roots show negative class 10th science chapter 7 ncert solutions 2??. Phototropism Ncert Solutions For Class 10th Science Chapter 1 Ii in plants occurs due to the hormone auxin.

When light falls on one side of a plant, the secretion of auxin hormone is more in the part away from the light. Hence, auxin causes growth in length of the cells in shady. So, the plant appears to bend towards scieence. Question 7 Which signals will get disrupted scjence case of a spinal cord injury? Answer: i Solutipns the involuntary actions will get disturbed. Therefore, the quick responses required to safe guard the body will not take place. Question chaptet How does chemical coordination occur in plants?

Answer: Chemical coordination in plants takes place with the help of class 10th science chapter 7 ncert solutions 2?? hormones. In most of the regions where division takes place meristematic regions stimuli cells secrete chemical compounds hormone. These substances identify the information by stimulating the other nearby cells and communicating the information. Question 9 What is the need for a system of control and coordination in an organism? Answer: An organism needs control and coordination system for the following functions : class 10th science chapter 7 ncert solutions 2?? To save the body of the organisms from the harmful changes in the environment.

Question 10 How are involuntary actions and reflex actions different from class 10th science chapter Ncert Solutions For Class 10th Science Chapter 2 Login 7 ncert solutions 2?? other?

Question 11 Compare and contrast nervous and hormonal mechanisms for control and coordination in animals. Question 12 What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs? Question 1. What type of plant movement is seen in the diagram of coiling of tendril? Chxpter do auxins promote the growth of a tendril around a support? Describe in brief.

CCE Answer: Clase or curvature movement that occurs in response to contact.

In this way, you can see animals obtain their nutrients through a wide variety of feeding patterns. You are surprised to know that our small intestine is 7. Question 4 What will happen if a solution of sodium hydrogen carbonate is heated. Involuntary actions always occur in response to stimuli picked up by receptors. Answer 1: a Cerebellum is not functioning properly may affect- i Walking in straight line ii Riding a cycle iii Maintaining the posture and balance of the body iv Movement is very coordinate, the patient sways in walking and tend to fall towards the affected side.
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