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NCERT Solutions for Class 10 Science Chapter 6 Control and Coordination
The NCERT Solutions for Class 10 Science Chapter 6 Control and Coordination explore how coordination works in animals and plants. Reading the answers helps students prepare for the exam and also gives them confidence. The answers are given in a step-by-step way by subject experts. Different well-labeled diagrams, flowcharts, and simple examples are added to make concepts easy to understand. Doing regular practice of the NCERT solutions increases the chances of performing well in the exam.
This Story also Contains
- Download PDF of Solutions of Control and Coordination Class 10
- Control and Coordination Class 10 NCERT Solutions (Intext Questions)
- NCERT Solutions for Class 10 Science Chapter 6 (Exercise Questions)
- Approach to Solve Class 10 Science Chapter 6 Question Answers
- Important Topics of Solutions of Control and Coordination Class 10
- Important Question from Solutions of Control and Coordination Class 10
- NCERT Solutions for Class 10 Science - Chapterwise
Control and Coordination Class 10 NCERT Solutions also highlight the role played by the hormones. All textbook questions are solved properly, which helps in revision and exam time. The chapter also helps students to know how coordination occurs and why it is needed. Students can download the Control and Coordination Class 10 NCERT Solutions PDF for last-minute preparation.
Also Read,
Download PDF of Solutions of Control and Coordination Class 10
Students can download the PDF for detailed questions and answers from the link given below. Control and Coordination is an important chapter as questions are frequently asked in the exam. The NCERT Solutions for Class 10 Science are prepared by subject experts in easy and simple language.
Control and Coordination Class 10 NCERT Solutions (Intext Questions)
Given below are the detailed answers to all the questions present in the chapter. Solving Class 10 Science Chapter 6 question answers is one of the most important parts of understanding the topics.
Topic 6.1 - Animals' Nervous System
Q.1. What is the difference between a reflex action and walking?
Answer:
The difference between a reflex action and walking-
| REFLEX ACTION | WALKING |
| This action is performed automatically. It is controlled and coordinated by the spinal cord. | It is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. The brain instructs and controls the muscles of the leg for movement. |
It is an involuntary action. | It is a voluntary action. |
Q.2 . What happens at the synapse between two neurons?
Answer:
The synapse is the small space between the two nerve cells. At the synapse, a chemical substance is released at the end of the axon of one of the neurons that reaches the other neurons with the help of a dendrite. Therefore, the information signal is transmitted from one neuron to other neurons by a synapse.
Q.3. Which part of the brain maintains posture and equilibrium of the body?
Answer:
The cerebellum controls and maintains the posture and equilibrium of the body.
Q.4. How do we detect the smell of an agarbatti (incense stick)?
Answer:
The smell of agarbatti (incense stick) mixed in the air. It is detected by the olfactory receptor of the nose. The olfactory nerve carries signals to the olfactory lobe in the forebrain and responds to the information signal.
Q.5. What is the role of the brain in reflex action?
Answer:
There is no role of the brain in a reflex action. These involuntary actions are controlled by the spinal cord, which reacts immediately without thinking of how to respond to a stimulus.
Topic 6.2 - Coordination in plants
Answer:
Plant hormones - These are also called phytohormones. Plant hormones are chemical substances produced in plants that regulate growth, development, and responses to the environment. They help in the growth of the plant(height), flowering, and also the development of plants and their response to the environment.
For example, auxins, gibberellins, and cytokinins are some phytohormones.
Answer:
Here is the difference:
Movement of leaves of sensitive plants | Movement of the shoot towards the light |
1. It does not depend on the direction of the stimulus applied. | 1. It depends on the direction of the stimulus applied. |
2. The stimulus is touch. | 2. The stimulus is light |
3. It is due to the sudden loss of water from the swelling at the base of the leaves. | 3. It is caused by the uneven growth on two sides of the shoot. |
4. It is not a growth movement. | 4. It is a growth movement. |
Q.3. Give an example of a plant hormone that promotes growth
Answer:
Auxins are phytohormones that promote growth in plants.
Q.4. How do auxins promote the growth of a tendril around support?
Answer:
When the tip of the tendril touches support, then the auxin of that side of the tip moves away from the side of the support. As we know, auxin promotes growth. So, due to the presence of more auxin in it, the side of the tendril away from the support grows longer and faster than the support side. This type of growth makes the tendrils bend around the support.
Q.5. Design an experiment to demonstrate hydrotropism
Answer:
The movement of the plant in the direction of the stimulus is called tropism.
AIM: To demonstrate hydrotropism in plants.
PROCEDURE :
i. Plant a seedling in a vessel containing soil.
ii. Adjacent to the seedling, put a porous pot containing water.
iii. Leave the setup for a few days.
OBSERVATION :
iv. On examining the roots of seedlings, it is observed that the roots bend towards the source of water and do not grow straight.
RESULT :
It confirms that the plant shows hydrotropism as the roots bend towards the porous pot of water. Hydrotropism is a plant growth response in which the direction of growth is determined by a stimulus of the gradient in water concentration.
Topic 6.3 Hormones in Animals
Q.1 . How does chemical coordination take place in animals?
Answer:
In animals, chemical coordination takes place through the hormones secreted by the endocrine gland. These hormones are released directly into the bloodstream and transported to specific target organs or cells. The target cells then respond according to the information carried by the hormones.
Q.2. Why is the use of iodised salt advisable?
Answer:
Thyroid glands need iodine to produce the thyroxine hormone, which controls the metabolic activities in our body, such as the metabolism of carbohydrates, fats, proteins, etc. Also, due to a lack of thyroxine, a disease called goitre is caused.
Therefore, the use of iodised salt is advisable to prevent this deficiency.
Q.3. How does our body respond when adrenaline is secreted into the blood?
Answer:
The rate of heartbeat becomes faster when adrenaline is secreted into the blood, so that the supply of oxygen to our muscles is greater. The amount of blood to the digestive system and skin is reduced because the small arteries around the muscles of these organs contract.
As a result, it turns the direction of blood towards our skeletal muscles. The respiration function becomes faster due to the contraction of the diaphragm and rib muscles.
Q.4. Why are some patients with diabetes treated by giving injections of insulin?
Answer:
The insulin hormone regulates the level of sugar in the blood. If it is not adequately secreted, then the sugar level rises in our blood, causing many harmful effects. So, that is why diabetic patients are treated by giving injections of insulin.
NCERT Solutions for Class 10 Science Chapter 6 (Exercise Questions)
Practicing questions is a good habit, as it makes students more confident and decreases stress. So, in this section, all questions of Control and Coordination with proper solutions are covered.
Q.1. Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin.
Answer:
The correct option is (D)
Plant hormones are auxins, gibberellins, cytokinins, etc. Insulin, thyroxine and estrogen are hormones secreted by the human body.
Q.2. The gap between two neurons is called:
(a) dendrite.
(b) synapse.
(c) axon.
(d) impulse.
Answer:
The correct option is (b)
A small space between the two nerve cells is known as the synapse. It helps in the transmission of an information signal.
Q.3. The brain is responsible for
(a) thinking.
(b) Regulating the heartbeat
(c) balancing the body.
(d) all of the above.
Answer:
The function of the brain is: thinking, regulating the heartbeat, and balancing the body. All the voluntary actions are controlled by different parts of the brain.
So, the correct option is (d)
Answer:
The function of receptors is to detect the information from the environment. These are located in our sensory organs, like the eye, ear, skin, nose, and tongue. For example, olfactory receptors detect smell. If these receptors do not work correctly, there will be a failure or delay in transmitting information. from the environment to the brain or spinal cord, and due to this, the reaction to the information is also late, which causes harmful effects on our body.
For example, if skin receptors are damaged, then we cannot get the heat as a stimulus. And if we accidentally touch a hot object, then our hands might get burned.
Q.5. Draw the structure of a neuron and explain its function.
Answer:
The structure of the nerve cell or neuron-
A neuron is the functional unit of the nervous system. It has three main parts-
Cell body
Dendrite
Axon
The function of nerve cells-
It carries the information in the form of an electrical signal, known as nerve impulses. Cells receive a stimulus to send it to the brain, and the spinal cord carries the message from the brain to the target organs.
Q.6. How does phototropism occur in plants?
Answer:
Phototropism is the movement of any part of the plant due to light. Positive phototropism is shown by the shoot of the plant, and the root shows negative phototropism. This phenomenon is due to the plant hormone called auxin.
When light falls on the side of the plant, the auxin hormone shifts towards the other side, which is away from the light. Thus, auxin causes growth in the length of the cells in the shady part. As a result, the plant appears to be bent towards the sun.
Q.7. Which signals will get disrupted in case of a spinal cord injury?
Answer:
In the case of spinal cord injury, the following will happen-
All involuntary actions will be disturbed
Reflex action will be disturbed because reflexes are located in the spinal cord, and so, the quick response to guard ourselves will not take place.
Q.8. How does chemical coordination occur in plants?
Answer:
Phytohormones or plant hormones are responsible for the chemical coordination in plants.
These hormones regulate the growth of the plants. For example, Auxin can help in the growth of the plant (stem), and Cytokinin is responsible for cell division.
Q.9. What is the need for a system of control and coordination in an organism?
Answer:
For the following function, an organism needs a control and coordination system-
To save the body of the organism from the changes in the environment.
Control the speed of voluntary and involuntary action
The capability of thinking and responding to any external stimuli.
Q.10. How are involuntary actions and reflex actions different from each other?
Answer:
INVOLUNTARY ACTION | REFLEX ACTION |
| Actions that occur immediately without any thinking are known as involuntary actions. | It is an immediate response to an event that does not require any processing by the brain. |
| It is an immediate response to an event that does not require any processing by the brain | These activities are controlled by the spinal cord. |
Example: breathing, the beating of the heart, etc | Example: Pulling the hand away from a hot object |
Q.11. Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
Answer:
NERVOUS MECHANISM | HORMONAL MECHANISM |
|
|
Answer:
Movement in a sensitive plant | Movement in a human leg |
|
|
|
|
Approach to Solve Class 10 Science Chapter 6 Question Answers
Understand the principles of control and coordination well and apply them logically to effectively answer questions.
Start by understanding the nervous system, hormones, and how they contribute to keeping the body coordinated.
Give extra focus to diagrams and processes such as reflex action and the endocrine system. Students can take help from the Control and Coordination Class 10 NCERT Solutions PDF.
Carefully read through each question to determine if it is about the nervous system or hormonal control.
Use simple language when describing mechanisms. To know how to write answers in an exam, students can refer to the Control and Coordination Class 10 NCERT Solutions.
Practice NCERT Solutions for Class 10 to develop confidence and gain accuracy.
Important Topics of Solutions of Control and Coordination Class 10
The topics and subtopics covered in the chapter Control and Coordination are mentioned below. Knowing the important topics of the NCERT Solutions for Class 10 Science Chapter 6 Control and Coordination improves learning.
Control And Coordination
Animals – Nervous System
Reflex action and its pathways
Coordination In Plants
Hormones In Animals
Check NCERT Books and NCERT Syllabus here:
Important Question from Solutions of Control and Coordination Class 10
Provided below is a question from the Control and Coordination chapter along with the solution. For more such questions, students can use the NCERT Solutions for Class 10 Science Chapter 6 Control and Coordination.
Question 1:
A plant growth inhibitor hormone that causes wilting of leaves is called.........
(a) Auxin
(b) Cytokinin
(c) Abscisic acid
(d) Gibberellin
Answer:
The correct answer is option(c) Abscisic acid
Explanation:
Abscisic acid is a plant growth inhibitor hormone that helps plants survive stress conditions like drought. It causes the stomata on leaves to close, reducing water loss and leading to wilting. By slowing down growth and conserving water, abscisic acid enables the plant to withstand unfavourable environments.
NCERT Solutions for Class 10 Science - Chapterwise
The chapter-wise questions and answers with all the links are given below-
Frequently Asked Questions (FAQs)
Q: What is the role of plant hormones in control and coordination?
A:
Plant hormones regulate growth and responses to stimuli such as light and gravity. For example, auxins promote cell elongation and help plants bend toward light (phototropism), enabling plants to adapt to their environment. All plant hormones are well-explained in the NCERT Solutions for Class 10 Science Chapter 6 Control and Coordination .
Q: How does chemical coordination occur in animals?
A:
Chemical coordination in animals is regulated by hormones secreted by endocrine glands. These hormones travel through the bloodstream to target organs, controlling processes like growth, metabolism, and reproduction
Q: What is control and coordination in living organisms?
A:
Control refers to the power to regulate or restrain processes, while coordination is the harmonious functioning of different organs and systems to produce an appropriate response to stimuli. Together, they ensure the body responds effectively to internal and external changes.
Q: How does the nervous system control and coordinate activities in the human body?
A:
The nervous system transmits electrical impulses through neurons to and from the brain and spinal cord, enabling rapid responses to stimuli. It controls voluntary, involuntary, and reflex actions by coordinating muscles and organs.
Q: What are reflex actions and how do they differ from voluntary actions?
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Questions related to CBSE Class 10th
On Question asked by student community
Have a question related to CBSE Class 10th ?
Hello,
If you want to get your 10th marksheet online, you just need to visit an official website like https://www.cbse.gov.in/ or https://results.cbse.nic.in/ for the CBSE board, and for the state board, you can check their website and provide your roll number, security PIN provided by the school, and school code to download the result.
I hope it will clear your query!!
Hello, if you are searching for Class 10 books for exam preparation, the right study material can make a big difference. Standard textbooks recommended by the board should be your first priority as they cover the syllabus completely. Along with that, reference books and guides can help in practicing extra questions and understanding concepts in detail. You can check the recommended books for exam preparation from the link I am sharing here.
https://school.careers360.com/ncert/ncert-books-for-class-10
https://school.careers360.com/boards/cbse/cbse-best-reference-books-for-cbse-class-10-exam
Hello Dinesh !
As per CBSE board guidelines for internal assessment for class 10th you will have to give a 80 marks board exam and 20 marks internal assessment. The internal assessment will be at the end of your year.
For knowing the definite structure of the internal assessment you will have to ask your teachers or your seniors in the school as CBSE has provided flexibility in choosing the methods of internal assessment to schools. For more details related to assessment scheme for class 10 given by CBSE you can visit: Assessment scheme (http://cbseacademic.nic.in/web_material/CurriculumMain2Sec/Curriculum_Sec_2021- 22.pdf)
I Hope you have understood it!
Hello
You asked about Class 10 sample paper board exam and most important questions. Practicing sample papers and previous year questions is one of the best ways to prepare for the board exam because it gives a clear idea of the exam pattern and types of questions asked. Schools and teachers usually recommend students to solve at least the last five years question papers along with model papers released by the board.
For Class 10 board exams, the most important areas are Mathematics, Science, Social Science, English, and Hindi or regional language. In Mathematics, questions from Algebra, Linear Equations, Geometry, Trigonometry, Statistics, and Probability are repeatedly seen. For Science, the key chapters are Chemical Reactions, Acids Bases and Salts, Metals and Non metals, Life Processes, Heredity, Light and Electricity. In Social Science, priority should be given to Nationalism, Resources and Development, Agriculture, Power Sharing, Democratic Politics, and Economics related topics. In English, focus on unseen passages, grammar exercises, and important writing tasks like letter writing and essays.
CBSE Sample Papers 2026: How to Download
Follow these steps to access the SQPs and marking schemes:
Step 1: Visit https://cbseacademic.nic.in/
Step 2: Click on the link titled “CBSE Sample Papers 2026”
Step 3: A PDF will open with links to Class 10 and 12 sample papers
Step 4: Select your class (Class 10 or Class 12)
Step 5: Choose your subject
Step 6: Download both the sample paper and its marking scheme
If you are looking for Class 10 previous year question papers for 2026 preparation, you can easily access them through the links I’ll be attaching. These papers are very helpful because they give you a clear idea about the exam pattern, marking scheme, and the type of questions usually asked in board exams. Practicing these will not only improve your time management but also help you identify important chapters and commonly repeated questions.
https://school.careers360.com/boards/cbse/cbse-previous-year-question-papers-class-10
https://school.careers360.com/boards/cbse/cbse-previous-year-question-papers
Popular CBSE Class 10th Questions
A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is
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Option 2)
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Option 4)
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An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range
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A particle is projected at 600 to the horizontal with a kinetic energy . The kinetic energy at the highest point
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In the reaction,
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Option 2)
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How many moles of magnesium phosphate, will contain 0.25 mole of oxygen atoms?
| Option 1)
0.02 |
Option 2)
3.125 × 10-2 |
| Option 3)
1.25 × 10-2 |
Option 4)
2.5 × 10-2 |
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