Class 10th History Chapter 7 Ncert Solutions Review,Sailing Dinghy For Sale Scotland Job,Worlds Most Expensive Boats For Sale Us - Step 3
04.01.2021, adminCandidates can find everything about control and coordination class 10 extra chapyer 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 history chapter 7 ncert solutions review 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 revirw What is the role of the brain in reflex action? Answer: There is no role of brain in reflex 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 movement of leaves chapted 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? Class 10th history chapter 7 ncert solutions review 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 class 10th history chapter 7 ncert solutions review support.
Auxins promote clazs. So, due to more auxins in it, the side of tendril away from bistory support grows faster and becomes longer than the side which is in contact with the support and makes the tendril twirl or bend around the support.
Question 5 Design an experiment cjapter demonstrate hydrotropism. Answer: Take two glass troughs A and B and class 10th history chapter 7 ncert solutions review 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 class 10th history chapter 7 ncert solutions review 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 from 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 class 10th history chapter 7 ncert solutions review 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 class 10th history chapter 7 ncert solutions review 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 necrt salt because thyroid gland needs iodine to produce thyroxin hormone.
Thyroxin hormone controls all the metabolic activities of our body like metabolism of carbohydrates, solutionx 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 revuew is supplied to our muscles.
The blood supply to the digestive system and skin decreases solutione the small arteries around the muscles 10gh 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.
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? 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 classs 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 solutionss 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 ncetr 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 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. Class 10th history chapter 7 ncert solutions review, 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.
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Some literate women started to write books and their autobiographies. Overall, the print culture in 19th century India helped in spread of the feeling of self-reliance among Indian women. The readership among them increased due to the publication of low priced books. Public libraries were also set up from the early 19th century, expanding the access to the books where all people could gain knowledge.
Encouraged and inspired by the social reformers, the people like factory workers too set up their libraries and some even wrote books.
They began publishing various vernacular and English and Hindi newspapers and books through which they could spread their opinions against widow immolation, child marriage, monotheism, Brahmanical priesthood and idolatry to the common people of the country. In this way the spread of print culture in the 19th century provided them a space for attacking religious orthodoxy and to spread modern social and political ideas to the people of different languages across the country.
Why did some people in 18th century Europe think that print culture would bring enlightenment and end despotism? Many people in the 18th century Europe thought that the print culture has the power in it to bring enlightenment and end despotism.
This would help in spreading of literacy and knowledge among all class of people. Social reformers like Louise, Sebastian Mercier, and Martin Luther felt that the print culture is the most powerful engine of progress and public opinion and hence, it would definitely bring enlightenment and an end to despotism.
Why did some people fear the effect of easily available printed books? Choose one example from Europe and one from India. Some people especially from upper class and powerful class feared the effect of easily available printed books. Their cause of fear was that due to the spread of literacy among the common people they may loose their position or authorities.
Some people feared that this may lead to the spread of rebellions and irreligious thoughts. Also, some religious leaders and some people from upper castes expressed their fear. What were the effects of the spread of print culture for poor people in nineteenth century India?
These were read by people across the country. Through these newspapers national leaders always tried to mobilize public opinion of Indian masses and unite them for the cause of nationalism. Your email address will not be published. This site uses Akismet to reduce spam.
Learn how your comment data is processed. Jasmeet December 2, Reply. Thanxxxx for the solutions. The four branches within this subject are quite a handful, so Dev Library has some great resources that can help you sail your way through 10th Social Science. Answering Social Science questions is a challenge and it can be hard to come up with the perfect answer.
One needs to know how to frame an answer that is to the point and accurate. Our experts have provided Class 10th solutions for in a well-structured format.
The students are advised to analyze all the concepts covered in the syllabus of class 10th Social Science and prepare a proper preparation strategy.
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