NCERT Solutions Class 10 Science Chapter 7

NCERT Solutions for Class 10 Science Chapter 7

NCERT Solutions for Class 10 Science Chapter 7 by Extramarks is a one-stop solution for all your queries regarding textbook questions from the Class 10 Science NCERT textbook. Step-by-step solutions have been provided to the intext questions and exercises. NCERT Solutions for Class 10 Science Chapter 7 – Control and Coordination have been prepared by subject experts for students who want to achieve their dream score in science 

The answers in Extramarks’ Class 10 Science Chapter 7 Solutions are drafted in very simple language. Also, Extramarks’ NCERT Solutions For Class 10 Science Chapter 7 are fully illustrated with relevant diagrams for visual assistance. This will further assist the students to clarify their doubts and master the basics related to the nervous & endocrine systems.

NCERT Solutions for Class 10 Science Chapter 7 – Control and Coordination

In Chapter 7, students will learn about the control and coordination systems in both animals and plants. These are the systems that control all the numerous functions and processes that happen inside living organisms keeping them functional. The chapter discusses the nervous system in detail, the different components of the nervous system including the brain, neurons, spinal cord, etc. It talks about the responses of a nervous system that can be classified as reflex actions, voluntary actions, and involuntary responses.

Students will also learn about the contributions of hormones to the control and coordination of different processes in living systems.

NCERT Solutions for Class 10 Science

Science is a subject that is tough for most Class 10 students. But if students prepare systematically and solve problems given at the end of each chapter of their Science textbook, they will be able to score well. To help students with their preparations, Extramarks offers solutions to questions covered in all chapters of the Class 10 Science NCERT textbook.

Chapter 1 Chemical Reactions and Equations
Chapter 2 Acids, Bases and Salts
Chapter 3 Metals and Non-metals
Chapter 4 Carbon and Its Compounds
Chapter 5 Periodic Classification of Elements
Chapter 6 Life Processes
Chapter 7 Control and Coordination
Chapter 8 How do Organisms Reproduce?
Chapter 9 Heredity and Evolution
Chapter 10 Light Reflection and Refraction
Chapter 11 Human Eye and Colourful World
Chapter 12 Electricity
Chapter 13 Magnetic Effects of Electric Current
Chapter 14 Sources of Energy
Chapter 15 Our Environment
Chapter 16

NCERT Solutions Class 10 Science Chapter 7 – Free View Online

Sometimes when the situations are uncertain, students are forced to study in spaces that are out of their comfort zone. But every minute of Class 10 board exam preparation is precious, and the students definitely cannot afford to lose out the time & thus have to study irrespective of the condition. Especially when it involves studying Chapter 7 Science Class 10 – a unit that is as complicated to understand. This is exactly when NCERT Solutions Class 10 Science Chapter 7 – available to access on the app and website can prove to be a savior. 

Questions Excerpted from Control and Coordination NCERT Solutions Class 10

Question: Which of the following is a Plant Hormone?

  1. Insulin
  2. Thyroxin
  3. Estrogen
  4. Cytokinin

Ans: Cytokinin

Explanation: Cytokinins are plant hormones that assist with cell division and cell growth. All the remaining hormones given in the question are found in animals.

 Question: The gap between two neurons is called________

  1. Dendrite
  2. Synapse
  3. Axon
  4. Impulse

Ans: Synapse

Explanation: Synapse is the gap between two neurons. It is the site where electrical impulses are transmitted between two different neurons. This is how different neurons are able to send signals to one another.

Key Benefits of Opting for Chapter  7 Science Class 10 NCERT Solutions

Scoring excellent marks in the Class 10 CBSE board examination is a task that is not as easy as it is thought to be. It requires an immense amount of dedication, patience, proper strategy, and brilliant study material. With NCERT Solutions for Class 10, students will get a compilation of detailed and accurate solutions to all the questions in their NCERT textbook. This will not only save them a lot of time and energy if they ever get stuck on a question, it will also give them an idea on how they should frame the answers in their final exams.

Also, most of the questions that students will face in their exams follow the same pattern of the questions given in the textbook. This makes it all the more important for students to use NCERT Solutions by Extramarks and include them in their preparations.

Some Major Advantages of Choosing NCERT Solutions Include

Class 10 studies are perceived as a memory tests for students. In reality, it is a chance for them to educate themselves about newer theories and notions, and understand what appeals to them enough to make a career out of it. Below listed are a few reasons why every Class 10 student must refer to NCERT Science Solutions:

  • NCERT Solutions is not merely an answer key. It is expert-written study material that actually prepares students for the long run by providing knowledge that is applicable to the present as well as future studies. Furthermore, NCERT Solutions by Extramarks also include practical and relatable examples and the students do not have to just mug things for the sake of marks
  • When it comes to the CBSE Board Class 10 Science examination, every question-  be it fill in the blanks, true or false, short format questions, or long format questions, comes with a guideline for answering. In Extramarks’ NCERT Solutions, every answer & explanation for the same is written as per the guidelines. This in turn ensures that students procure the highest marks. 
  • On Extramarks’ website and app, a student can also access science chapter 7’s important questions, past year’s question papers & tips and tricks to gain those brownie points. Most importantly, it covers the common errors that most students commit in their CBSE Class 10 Science Board Examination and teaches how they can avoid them.
  • Time is of the essence when it comes to CBSE Class 10 Board Exam preparation. A lot of students waste their precious time searching and drafting answers to questions and exercises behind their textbooks. Instead of wasting their time, students can rely on NCERT Solution by Extramarks – available for all subjects and chapters. The time saved can be utilized to perfect weaker concepts or continuously revise.

 Related Questions

  1. What are Plant Hormones?

Ans:  Plant hormones are chemical compounds that occur naturally. These Phytohormones are responsible to govern plant cell growth and metabolism. Plant hormones are created in one part of the plant’s body. Once made, they are transported to the other parts as required. Auxins, gibberellins, cytokinin, abscisic acid, and ethylene are the five crucial types of plant hormones.

  1. The brain is responsible for

(a) thinking.                                      (b) regulating the heartbeat.    

(c) balancing the body.                      (d) All of the above.

 Ans: All of the above

Q.1 Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Estrogen
(d) Cytokinin


d) Cytokinin

Explanation: Insulin, thyroxin and oestrogen are animal hormones.

Q.2 The gap between two neurons is called a
(a) dendrite.
(b) synapse.
(c) axon.
(d) impulse.


b) Synapse

Explanation: Dendrite and axon are the parts of a neuron. Impulse is the electrical signal that travels through a neuron.

Q.3 The brain is responsible of
(a) thinking
(b) regulating the heart beat
(c) balancing of the body
(d)all of the above


d) all of the above

Explanation: Our brain is a part of the nervous system that plays an important role in the control and coordination of higher animals. Thinking, regulating heart beat and balancing of the body are some of the functions that are controlled by the brain.

Q.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 receptors are the sensory structures that on receiving environmental stimuli generate a nerve impulse. For example, our skin possesses many receptors that respond to the environmental stimuli such as increase or decrease in temperature, pain, etc. Taste receptors present on tongue help in identifying different tastes.

Functions of the receptors are:

  1. They sense the external stimuli.
  2. They also trigger impulse after perceiving stimuli.

When the receptors are damaged, the external stimuli, transferring signals to the brain are not felt. For example, when we drink hot coffee or tea, taste receptors on the tongue gets damaged. These damaged taste buds do not allow us to enjoy our food for a little while as they are not able to perceive the external stimuli i.e., taste of food.

Q.5 Draw the structure of a neuron and explain its function.


Neuron is the structural and functional unit of nervous system. The parts of a neuron are cyton (cell body), axon, and dendrites.

Functions of the parts of a neuron:

Dendrite: It receives information from the axon of another neuron and conducts the message in the form of an impulse in the cyton (cell body).

Cyton (cell body): It consists of nucleus, mitochondria, and other cell organelles and concerned with the growth and maintenance of the neuron.

Axon: It helps in conducting messages in the form of impulse away from the cyton (cell body).

Q.6 How does phototropism occur in plants?


Phototropism refers to the orientation of organisms in response to light. In plants, phototropism occurs due to the presence of a plant hormone called auxin. Auxin is synthesised at the shoot tips of the plants and help the plant cells to grow longer. In a case, when light is coming from one side of a plant, the plant hormone auxin diffuses towards the side of the plant shoot where no light is coming. The cells of the shoot which is away from the light start growing longer under the influence of plant hormone auxin and this causes bending of the plant towards light (phototropism).

Q.7 Which signals will get disrupted in case of a spinal cord injury?


In case of a spinal cord injury, the signals coming from the nerves and the receptors and the signals reaching the effector organ will be disrupted.

Q.8 How does chemical coordination occur in plants?


Plants do not possess a nervous system. Plants respond to the external and internal stimuli by showing different types of movements. In plants, growth, development and response to the stimuli is controlled and coordinated by certain chemical substances produced in their cells called hormones. A plant hormone is an organic compound which is synthesised at plant parts away from where they act and when required diffuses to the area of action. The five major types of plant hormones are auxins, gibberellins, cytokinins, abscisic acid and ethylene. These plant hormones either act as growth promoters or growth inhibitors. Auxins, gibberellins, cytokinins are growth promoters and abscisic acid and ethylene act as growth inhibitor.

Q.9 What is the need for a system of control and coordination in an organism?


An organism comprises millions of cells, tissues, organs and organ systems. In an organism, all the organ systems work in coordination with each other and are responsible for the sustenance and survival of an organism in its environment. The more complex is the organism, the more coordination is required. It is very much necessary that various organ systems of an organism should work together in controlled and coordinated manner so that different body parts can function as a single unit and respond appropriately to the stimuli. In the absence of this system of control and coordination, our body will not be able to function properly. In animals, the control and coordination are provided by the nervous system and endocrine system whereas in plants nervous system is absent.

Q.10 How are involuntary actions and reflex actions different from each other?


Involuntary actions cannot be consciously controlled. For example, we cannot consciously control the contraction and relaxation of our heart muscles. Involuntary actions are directly under the control of the brain. On the other hand, the reflex actions such as removal of hand just after getting pricked by a thorn shows sudden response and do not involve any thinking process. This clearly shows that the reflex actions are not under the control of brain as the involuntary actions are.

Q.11 Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.


Character Nervous Control and Coordination Hormonal Control and Coordination
Form of Information Nerve impulse Chemical messenger
Mode of transmission of information Through axons and dendrites Through blood
Flow of information Rapid Slow
Response Quick Slow
Duration of effect Short-lived Prolonged effects

Q.12 What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?


The movement that takes place in a sensitive plant such as Mimosa pudica is an example of the response to touch stimulus. In response to the stimulus of touch and for this movement to occur, the plant cells change their shape by changing the amount of water in them. Movement in our legs is a voluntary action. In a voluntary action, the signals are passed to the brain and hence are consciously controlled. In animal muscle cells, when a nerve impulse reaches the muscle cells, the muscle cells move by changing their shape. Muscle cells possess special proteins that on receiving the nerve impulse change their shape and arrangement which further cause the movement of the organ.

Please register to view this section

FAQs (Frequently Asked Questions)

1. What should I do if I forget an answer in the middle of my Class 10 Science examination?

First of all, do not lose your calm. Understand that the more you get nervous, the less are your chances of remembering the answer.

  • Now take a deep breath and move on to the questions that you think you can answer.
  • As you start answering, you will gain a little confidence again. Do not jump to answer the question that you have forgotten about yet.
  • Complete answering every question in the paper, re-check your answers, and then circle back to the question you have forgotten. This way, you can ensure that even if you end up not remembering, you will not lose any additional marks.
  • Now, think of the time when you studied this answer and jot down the points in your rough sheet. For instance, if this question was from Ch 7 Science Class 10, deeply think about pointers you mentally noted while studying.
  • Frame the answer and write.

2. How can I by-heart the difficult topics from Ch 7 Science Class 10?

Never commit the mistake of byhearting any difficult topic. If you memorize a concept, there can be only one out of two outcomes – you will either forget one word & eventually the entire answer during the exam or if your basics are clear, you will face problems during your future studies. Instead, focus on understanding the concepts.

3. Can I score full marks in CBSE Class 10 Science Board Examination?

Yes, you can definitely score full marks in CBSE Class 10 Science Board Examination. But this requires hard work alongside good study material. Always make sure to go through all the chapters, focus on concepts, and make sure to solve all textbook questions. Students can always refer to the NCERT Solutions for Class 10 Chapter 7 if they ever get stuck on a question or for their last-minute preparations.

4. How to prepare for CBSE Class 10 Science Board Examination?

  • Start your CBSE Class 10 preparation from the beginning of the academic year itself.
  • Focus on concepts. Thoroughly go through each chapter given in the textbook and the most important thing is to practise the questions given at the end of each chapter. Remember that many questions asked in final exams follow the same pattern as the questions presented in the textbook. So, solving textbook questions will give students a lot of confidence. This is where students will find NCERT Solutions for Class 10 Science by Extramarks highly valuable.