NCERT Solutions Class 10 Science Chapter 7 Control and Coordination – Here are all the NCERT solutions for Class 10 Science Chapter 7. This solution contains questions, answers, images, explanations of the complete Chapter 7 titled Control and Coordination of Science taught in class 10. If you are a student of class 10 who is using NCERT Textbook to study Science, then you must come across Chapter 7 Control and Coordination. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination in one place.
NCERT Solutions Class 10 Science Chapter 7 Control And Coordination
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For a better understanding of this chapter, you should also see summary of Chapter 7 Control And Coordination , Science, Class 10.
Control And Coordination
NCERT Solutions Class 10 Science chapter 7 Control And Coordination
Class 10, Science chapter 7, Control And Coordination solutions are given below in PDF format. You can view them online or download PDF file for future use.
Control And Coordination
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Question & Answer
Q.1: What is the difference between a reflex action and walking?
Ans : A reflex action is a rapid, automatic response to a stimulus. It does not involve any thinking. For example, we close our eyes immediately when the bright light is focused. Walking, on the other hand, is a voluntary action. It is under our conscious control.
Q.2: What happens at the synapse between two neurons?
Ans : A very small gap that occurs between the last portion of axon of one neuron and the dendron of the other neuron is known as a synapse. It acts as a one way valve to transmit impulses in one direction only. This uni-direction transfer of impulses occurs as the chemicals are produced in only one side of the neuron i.e., the axon's side. From axon, the impulses travel across the synapse to the dendron of the other neuron.
Q.3: Which part of the brain maintains posture and equilibrium of the body?
Ans : Cerebellum, a part of hindbrain is responsible for maintaining posture and equilibrium of the body.
Q.4: How do we detect the smell of an agarbatti (incense stick)?
Ans : The thinking part of our brain is the forebrain. It has separate areas that are specialized for hearing, smelling, sight, taste, touch, etc. The forebrain also has regions that collect information or impulses from the various receptors. When the smell of an incense stick reaches us, our forebrain detects it. Then, the forebrain interprets it by putting it together with the information received from other receptors and also with the information already stored in the brain.
Q.5: What is the role of the brain in reflex action?
Ans : Reflex actions are sudden responses, which do not involve any thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking as thinking may take time which would be enough to get us burnt. The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is called a reflex arc. The reflex arcs —connections present beween the input and output nerves — meet in a bundle in the spinal cord. Reflex arcs are formed in the spinal cord and the information (input) reaches the brain. The brain is only aware of the signal and the response that has taken place. However, the brain has no role to play in the creation of the response.
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