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NCERT Solutions for Class 10 Geography CBSE - Topperlearning

Candidates can find everything about control and coordination class 10 extra questions with answers in this article. The answer to each and every question in class 10 science chapter 7 notes is provided along with 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 class 10th geography chapter 7 ncert solutions media of axon of one nerve cell that reaches to the other nerve cell through the dendrite. Thus, information is transmitted from one 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 of 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. Question 5 What is the role of the brain in reflex class 10th geography chapter 7 ncert solutions media Answer: There is no role of brain in reflex action. These involuntary actions are controlled by the spinal cord which take place class 10th geography chapter 7 ncert solutions media 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 class 10th geography chapter 7 ncert solutions media 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 movement of leaves of the sensitive plant different from the movement of a shoot towards light? Question 4 How do auxins Ncert Solutions Of Class 10th Geography Chapter 1 Full promote the growth of a tendril around a class 10th geography chapter 7 ncert solutions media 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 is in contact with the support and makes the tendril twirl class 10th geography chapter 7 ncert solutions media 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 is straight. On the other hand, the root of seedling in trough B is found to be bent to the right side i. In trough A, the root of the seedling gets water class 10th geography chapter 7 ncert solutions media both sides. But in trough B, 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. This 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 use iodised salt because thyroid gland 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 class 10th geography chapter 7 ncert solutions media 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 our skeletal muscles. The breathing rate also increases due to the contractions of the diaphragm and 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. Class 10th geography chapter 7 ncert solutions media 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? Think of situations where receptors do not work properly. What problems are likely to arise? The function of receptors is to detect information from the environment. For 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 causing 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 plant due to light is called phototropism.

The shoot of plant shows positive phototropism and roots show negative phototropism. Phototropism in plants occurs due to the class 10th geography chapter 7 ncert solutions media 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 light.

Question 7 Which signals will get disrupted in case of a spinal cord injury? Answer: i All the involuntary actions will get disturbed.

Therefore, the quick responses required to safe guard the body will not take place. Question 8 How does chemical coordination occur in plants? Answer: Chemical coordination in plants takes place with the help of plant 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 : i 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 each 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?

How do auxins promote the growth of a tendril around a support? Describe in brief. CCE Answer: Thigmotropism or curvature movement that occurs in response to contact.

Main point:

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Describe the people of the Sahara desert Also write about their activities. Despite that various groups Class 10th Geography Chapter 4 Ncert Solutions Technology of people such as the Bedouins and Juaregs live here. These are nomadic tribes who pursue different activities. They rear animals such as goats, sheep, camels and horses. They get jnilk and hides from these animals. They prepare leather from hides.

This leather is used in making belts, slippers, water bottles. They use the hair of these animals in making mats, carpets, clothes and blankets. The people of the Sahara desert wear heavy robes to protect themselves from the dust storms and hot winds. The oasis in the Sahara desert and the Nile valley in Egypt support the settled population. Since water is available, people grow date palms.

They also grow rice, wheat, barley and beans. The Sahara is undergoing change with fast speed. Tuaregs, the nomadic tribe, are now acting as guides to foreign tourists. More and more nomadic herdsmen are migrating to cities in search of jobs in oil and gas operations.

Describe the flora and fauna found in the Ladakh desert. There are scanty patches of grasses and shrubs. Groves of willows and poplars are seen in the valleys. During the summers, fruit trees such as apples, apricots and walnuts grow. Several species of birds are found in the Ladakh desert. Robins, redstarts, Tibetan snowcock, raven, and hoopoe are common.

The animals found in this region are wild goats, wild sheep, yak, and special kinds of dogs. Match the following: 4. Give reasons: There is scanty vegetation in the deserts. People of the Sahara desert wear heavy robes. Answer: There is scanty vegetation in the deserts because of the following reasons: Vegetation depends on two factors: climate and soil. The climate in the deserts is either very hot and dry or very cold and dry.

Hence vegetation does not grow in dry conditions. Soil is either sandy in hot deserts or covered with snow cold deserts for most of the year. Both types of soil do not encourage vegetation to grow. People of the Sahara Desert wear heavy robes because of the following reasons: Robes of the people of Sahara Desert are made of hides of animals or hair of animals.

What is the difference between international and local trade? The region houses a highly dense population with a large number of agricultural fields, thereby supporting transportation across the region. The trade between countries is known as international trade, and the trade which takes place among the states, cities, towns, and villages of the same country is known as local trade.

The nature of international trade has changed in a variety of ways in the last fifteen years. The trade has moved from being restricted to trade in goods to exchange of information, technology, and knowledge. The advent of globalisation has changed the picture of international trade. For example, India has emerged as a software giant and the field of information technology is growing increasingly in India. Thus, settlements began to grow near the Ncert Solutions For Class 10th Geography Chapter 5 Dig river valleys as the water was available and land was fertile.

By and by settlements became larger because trade, commerce, and manufacturing developed. Settlements can be permanent or temporary. Give a detailed description of waterways. Answer: Waterways are the cheapest mode of transport.

They carry heavy and bulky goods over long distances. They are mainly of two types�inland waterways and sea routes. What are the major means of transport? Explain each of them [Imp. Roads the most commonly used means of transport.

Roads are of two types�metalled roads also known as pucca roads and unmetalled roads also known as Kutcha roads. The plugins have a dense network of roads. Roads built underground are called subways or underpass. Flyovers are built over raised structures. The railways carry people and bulky goods. They cover long distances quickly and cheaply. The railway network is well developed over the plain areas.

With the development of advanced technical skills, we have now railway lines laid in difficult mountain terrains also. The Indian railway network is well developed and the largest in Asia. Waterways are the cheapest means of transport. They are of two types�inland waterways and sea routes. Navigable rivers and lakes are used as inland waterways� for example, the Ganga-Brahmaputra river system.

Sea routes and oceanic routes are mostly used for transporting merchandise and goods from one country to another. Airways are the most expensive means of transport. Helicopters are useful in most inaccessible areas and in times of calamities. Answer the following questions briefly. What are the four means of transport? Which are the activities practiced by the rural people?

Mention any two merits of railways. What do you understand by communication? What is the mass media? Services related to primary activities. Merits of Railways: Quick means of transport Carrier of bulk goods over long distances Cheap means of transport. Any two Communication: By communication we mean transmitting messages, ideas and words, written or oral.

Mass Media: Mass Media is the medium of communication to the masses. They are print media, radio, and television. Airways have reduced time taken in journeys. Means of communication have reduced both distances and time. We can talk, see, and interact with people sitting thousands of kilometers away within no time.

We can strike business deals in seconds through superfast means of communication, like the internet, satellite phones, etc.

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