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NCERT Solutions for Class 10 Geography Chapter 7 in PDF for

A reflex action is voluntary action which is a rapid and automatic response to stimuli while walking is a voluntary action which requires our thinking and in our control. A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.

When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.

Brain has no direct involvement in reflex action. It is mainly controlled by Spinal Cord as these ncert solutions for class 10th geography chapter 7 words not requires thinking and are very quick action. Plant hormones are the fluids which are secreted within the plant also known as phytohormones.

Plant hormones regulate the growth and development of the plant. Examples of plant hormones are auxin, gibberellins. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light? The movements of the leaves of the sensitive plant are touch sensitive and independent of growth while the movement of the shoot towards light is growth related and known as phototropism.

When tendrils come in contact with any support, the part of the tendril in contact with the object does not grow as rapidly as the part of the tendril away from Ncert Solutions For Class 10th Geography Chapter 1 the object. This is caused by the action of auxin hormone. Less auxin occurs on Ncert Solutions For Class 10th Geography In Hindi Video the side of contact as compared to the free side as a result, auxin promotes growth on the free side and the tendrils coil around the Ncert Solutions Of Class 10th Geography Chapter 2 Doc support.

Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge.

Now, cover the entire set-up with a transparent plastic container so that the moisture is retained. Observation: The roots of the germinating seeds will grow towards beaker A. Chemical coordination takes place in animals with the help of hormones. Hormones are the chemical fluids ncert solutions for class 10th geography chapter 7 words are secreted by the glands of the endocrine.

Hormones regulate the overall growth and development of the animals. Iodine stimulates the thyroid gland to produce thyroxin hormone. It regulates carbohydrate, fat, and protein metabolism in our body.

Deficiency of this hormone results in the enlargement of the thyroid gland. This can lead to goitre, a disease characterized by swollen neck. Therefore, iodised salt is advised for normal functioning of the thyroid gland. When someone is in danger or in emergency then adrenal gland secrete adrenaline hormone.

It is secreted directly into the blood and is transported to different parts of the body. It speeds up the heartbeat and hence supplies more oxygen to the muscles. This results in increasing breathing rate and blood pressure which enable them to fight with such urgent situation.

Diabetes is caused due to less or no secretion of hormone insulin by pancreas. In such a ncert solutions for class 10th geography chapter 7 words, blood sugar level is high.

Insulin converts extra sugar present in blood into glycogen. Thus, patients suffering from diabetes are given insulin injection to control their blood sugar level.

Which of the following is a plant hormone? The gap between two neurons is called a a dendrite. The brain is responsible for a thinking. What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise? When the receptors are damaged, the external stimuli transferring signals to ncert solutions for class 10th geography chapter 7 words brain are not felt. For example, in the case of damaged receptors, if we accidentally touch any hot object, then our hands might get burnt as damaged receptors cannot perceive ncert solutions for class 10th geography chapter 7 words external stimuli of heat and pain.

Draw the structure of a neuron and explain its function. It is mainly concerned with the maintenance and growth.

The growth movement in plants in response to light stimulus is known as phototropism. The shoots show positive phototropism and the roots show negative phototropism.

This means that the shoots bend towards the source of light whereas the roots bend away from the light source. For Example: The flower head of sunflower is positively phototropic and hence it moves from east to west along with the sun.

In case of the spinal cord injury, the signals coming from the nerves as well as the signals coming to the receptors will be disrupted. As both these signals meet in a bundle in spinal cord so there is any spinal cord injury then both these signals are disrupted.

Chemical coordination occurs in plants with the help of plant hormones. Different plant hormones help to coordinate growth, development, and responses to the environment. They are synthesized at places away from where they act and diffuse to the area for action, For example, auxin promotes cell growth, gibberellins promote stem growth, cytokinins promote cell division and abscisic acid inhibits growth and its effects include wilting of leaves.

There are various organs in an organism. These organs must be carefully controlled and coordinated for the survival of an organisms. In the body of an organism various fluids are secreted from the glands of the endocrine. These hormones are responsible for the overall growth and development of an organism. All others daily decision that includes ncert solutions for class 10th geography chapter 7 words and involuntary action are controlled by central nervous system CNS.

Involuntary action is the set of muscle movement which do not require thinking. But it is controlled by brain for example beating of heart beat while on the other hand, the reflex action is rapid and spontaneous action in response to any stimulus.

For example closing of eyes immediately when bright light is focused. Compare and contrast nervous and hormonal mechanisms for control and coordination in animals. What is the difference ncert solutions for class 10th geography chapter 7 words the manner in which movement takes place in a sensitive plant and the movement in our legs?

Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. Madhusmita October 21, Reply. Really helpful �. Add a Comment Cancel reply Your email address will not be published. The movement in a sensitive plant is a response to stimulus touch which is a involuntary action.


If we wish to operate a single in all the photographs, geogarphy wish to have my pockets drain dry. Fasten a center of a insurgency rope to the solid square of apparatus or seat.

Anchoring is the wily operation.

What are its different types? Early human beings did not need to develop settlements because they lived on trees and in caves. When they started to grow crops, it became essential to have a permanent home.

Thus, settlements began to grow near the 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. The rail gauge with a track width of 1. The southern terminal of the National Highway No.

A Riverine Port. Busiest railway junction in Northern India. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.

It again involves a link between nature and the social sciences which are the human behavior. Students can encounter the size of population, physical features of India, natural vegetation and wildlife and everything one should be familiar with climate.

You will learn to value the planet in which we live in and its people. CoolGyan makes these concepts easy to understand and fun to study. Geography Revision Notes for Class Question 2. Answer the following questions in about 30 words. Ans: Merits of roadways: The Construction cost of roads is much lower than that of railway lines.

Roads can go through dissected and undulating land areas and through steep mountains They are economical as loading costs are low and door-to-door service can be availed of. Road transport is most suited for transporting delicate goods like chinaware and glassware, which are likely to be damaged in the process of loading and unloading. Question 3. Answer the following questions in about words.

Answer: The means of transportation and communication are called the lifelines of a nation and its economy due to the reasons given below: The means of transportation and communication help in the production and movement of goods and services. Transport helps in the development of communication. All the solutions can also be downloaded in PDF format which makes it convenient to read these solutions in offline mode as well.

What is the difference between international and local trade? Along Ncert Solutions Of Class 10th Geography Chapter 5 Min with this, large population and rich agricultural resources make the rail transport a profitable venture. They have helped in the economic development of these areas. They help to develop active links between different regions.

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