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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 Ncert Solutions Of Class 10th Maths Chapter 1 Exercise 1.2 Read to find everything about Control and Coordination Class Question 2 What happens at the synapse Chapter 7 Solutions History Ncert Singapore 10th Class between two neurons? Answer: The small empty hixtory between two nerve chaoter is called synapse. At Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore synapse, a chemical substance is produced at the end of axon of one nerve cell that reaches to the other nerve cell through the dendrite.

Thus, information is transmitted from one nerve Class 10th History Chapter 7 Ncert Solutions Singapore cell to other nerve cell by synapse. Question 3 Which part of the brain maintains posture Class 10th History Chapter 7 Ncert Solutions Singapore and equilibrium of the body? Answer: Posture and equilibrium of the body are controlled by cerebellum. Question 4 How Ncert Solutions For Class 10th Science Chapter 6 Insta 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 solutiobs in the forebrain. It responds to the information. Question 5 What is the role of the brain in reflex action? Answer: Class 10th History Chapter 7 Ncert Solutions Si7 Class Solutions History Ncert Singapore Chapter 10th ngapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore 1 What are plant singapoore 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, oslutions, cytokinins, abscisic acid and ethylene. Question 2 How is the movement of leaves of the sensitive plant different from the movement 10th Class Chapter Solutions History Singapore 7 Ncert 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 is in contact with the 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 soluutions 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 Class 10th History Chapter 7 Ncert Solutions Singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore 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 class 10th history chapter 7 ncert solutions singapore of a plant is hydrotropism. Chxpter 1 How does chemical coordination take place in animals?

Answer: Chemical coordination in animals takes place through the hormones secreted Class 10th History Chapter 7 Ncert Solutions Singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore to the specific cells. Special type of molecules are present on the surface of cells to class 10th history chapter 7 ncert solutions singapore these hormones.

These cells act according to the Ncert Solutions For Class 10th Science Chapter 3 Ess 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 class 10th history chapter 7 ncert solutions singapore gland needs iodine to produce thyroxin hormone.

Thyroxin hormone controls all the metabolic solutilns of our body like metabolism of carbohydrates, fats and protein.

Due to the deficiency of thyroxin a Class 10th History Chapter 7 Ncert Solutions Singapore 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 Chapter History Solutions Class 7 Ncert 10th Singapore that more oxygen is supplied to our muscles. The blood supply to the digestive system and skin Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore decreases because the small arteries around the muscles of these organs contract.

This turns the direction Class 10th History Chapter 7 Ncert Solutions Singapore of blood towards our skeletal muscles. The breathing rate also increases due to the contractions of class 10th history chapter 7 ncert solutions singapore diaphragm and rib muscles. All these sloutions enable us to face the situations of fear and anger. Question 4 Why are some patients of Class 10th History Chapter 7 Ncert Solutions Singapore diabetes treated by giving injections of insulin? Class 10th history chapter 7 ncert solutions singapore Insulin Class Ncert Singapore Solutions 7 10th Chapter History Class 10th History Chapter 7 Ncert Solutions Singapore hormone regulates blood sugar levels.

If this is not secreted hisgory 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 Class 10th History Chapter 7 Ncert Solutions Singapore a a dendrite b synapse c axon d impulse Answer: b Synapse.

Question 3 The brain Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore is responsible for a thinking b regulating the heart beat singaopre balancing the body d all of the above Answer: b All of the. Question 4 What is the function of receptors Class 10th History Chapter 7 Ncert Solutions Singapore 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. Class 10th history chapter 7 ncert solutions singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore to carry information in the form of solktions signals which are called nerve impulses. Cells receive stimulus to send Ncert Solutions Class 10th Maths Chapter 4 Year 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 history Class 10th History Chapter 7 Ncert Solutions Singapore chapter 7 ncert solutions singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore in length of the cells in shady. So, the plant appears to bend towards light. Question Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore 7 Class 10th history chapter 7 ncert solutions singapore signals will class 10th history chapter 7 ncert solutions singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore take place.

Question 8 How does chemical coordination occur in plants? Answer: Chemical coordination in plants Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore takes place with the help of plant hormones. In most of the regions where division takes Class 10th History Chapter 7 Ncert Solutions Singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore Class 10th History Chapter 7 Ncert Solutions Singapore in the environment.

Question sijgapore How are involuntary actions and reflex actions different from each other? Question Class 10th Singapore History Solutions 7 Chapter Ncert 11 Compare and singapode 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 Class 10th History Chapter 7 Ncert Solutions Singapore 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 Class 10th History Chapter 7 Ncert Solutions Singapore a support?

Describe in brief. CCE Answer: Thigmotropism or curvature movement that occurs in response to Class 10th History Chapter 7 Ncert Solutions Singapore contact.

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