Welcome, future toppers! 🚀 Are you gearing up for your CBSE Class 10 Board Exams? The Control and Coordination chapter is a crucial part of the Biology syllabus, covering how living organisms respond to stimuli. To help you ace this chapter, we've compiled a comprehensive list of 50 very short answer (VSA) questions, each worth 1 marks, that have been frequently asked in previous year CBSE board examinations.
Practicing these questions is one of the best ways to understand the exam pattern, identify important topics, and master the key concepts. Let's dive in and strengthen your preparation.
50 Important Very Short Answer Questions (Control and Coordination)
1. Name the structural and functional unit of the nervous system.
Answer: Neuron.
2. What is a synapse?
Answer: The junction between two neurons, across which nerve impulses pass.
3. Which part of the brain is responsible for maintaining posture and equilibrium?
Answer: Cerebellum.
4. Name the plant hormone that is responsible for the wilting of leaves.
Answer: Abscisic acid (ABA).
5. What is the function of insulin hormone?
Answer: It regulates and lowers blood sugar levels.
6. Which hormone is known as the 'emergency hormone'?
Answer: Adrenaline.
7. Define reflex action.
Answer: A sudden, involuntary, and rapid response to a stimulus.
8. Name the largest part of the human brain.
Answer: Cerebrum.
9. What is phototropism?
Answer: The directional growth of a plant part in response to a light stimulus.
10. Name the disease caused by the deficiency of iodine.
Answer: Goitre.
11. Which gland is known as the master gland?
Answer: The pituitary gland.
12. Which part of the neuron acquires information?
Answer: Dendrite.
13. Name the growth-inhibiting plant hormone.
Answer: Abscisic acid (ABA).
14. What are the two main components of the central nervous system in humans?
Answer: The brain and the spinal cord.
15. Name the gland that secretes digestive enzymes as well as hormones.
Answer: Pancreas.
16. What is the pathway of a nerve impulse in a reflex arc?
Answer: Receptor → Sensory Neuron → Spinal Cord → Motor Neuron → Effector.
17. Which hormone promotes cell division in plants?
Answer: Cytokinin.
18. Where are adrenal glands located in the human body?
Answer: On top of the kidneys.
19. What is geotropism?
Answer: The directional growth of a plant part in response to gravity.
20. Name the hormone responsible for the development of secondary sexual characters in males.
Answer: Testosterone.
21. What protects the brain from mechanical shocks?
Answer: The cranium (skull) and cerebrospinal fluid (CSF).
22. Name the hormone synthesized at the shoot tip that helps in plant growth.
Answer: Auxin.
23. Why are patients with diabetes treated with injections of insulin?
Answer: Because insulin cannot be administered orally as it would be digested by protein-digesting enzymes in the stomach.
24. What is the function of the cerebrum?
Answer: It is the main thinking part of the brain and controls voluntary actions, memory, and intelligence.
25. Name the hormone that regulates the metabolism of carbohydrates, proteins, and fats.
Answer: Thyroxine.
26. What is the movement of a sunflower in response to day or light called?
Answer: Phototropism.
27. Name the fluid-filled space between the meninges.
Answer: Cerebrospinal fluid (CSF).
28. What is chemotropism?
Answer: The directional growth of a plant part in response to a chemical stimulus.
29. Which part of the brain controls involuntary actions like blood pressure and vomiting?
Answer: Medulla in the hindbrain.
30. Which gland secretes growth hormone?
Answer: The pituitary gland.
31. What is hydrotropism?
Answer: The directional growth of a plant part in response to water.
32. Name the female sex hormone.
Answer: Oestrogen.
33. What is the role of receptors in our body?
Answer: Receptors are specialized cells that detect stimuli (like heat, pain, smell) from the environment.
34. Give an example of a nastic movement in plants.
Answer: The folding of leaves in the 'touch-me-not' plant (Mimosa pudica) upon being touched.
35. How is the flow of information in a reflex arc different from a voluntary action?
Answer: In a reflex arc, the nerve impulse reaches the spinal cord and is reflected back, bypassing the brain for a quicker response.
36. Name the hormone responsible for phototropism.
Answer: Auxin.
37. Which system facilitates communication between the central nervous system and other parts of the body?
Answer: The peripheral nervous system (PNS).
38. What is the primary function of gibberellins?
Answer: They help in the growth of the stem.
39. Name the gap in the myelin sheath between adjacent Schwann cells.
Answer: Node of Ranvier.
40. What is a ganglion?
Answer: A cluster of nerve cell bodies in the peripheral nervous system.
41. What is the difference between tropic and nastic movements?
Answer: Tropic movements are directional movements dependent on the stimulus direction, while nastic movements are non-directional.
42. Which endocrine gland is present only in females?
Answer: Ovary.
43. Which part of the nervous system controls reflex actions?
Answer: The spinal cord.
44. What is the function of the hormone Abscisic acid?
Answer: It inhibits growth and causes the wilting of leaves and dormancy of buds.
45. Name the membranes covering the brain.
Answer: Meninges.
46. Give an example of chemotropism in plants.
Answer: The growth of the pollen tube towards the ovule.
47. What is the effect of adrenaline on the heart?
Answer: It increases the heart rate.
48. How do nerve impulses travel across a synapse?
Answer: Through the release of chemical substances called neurotransmitters.
49. Why is it advised to use iodized salt?
Answer: To provide iodine for the thyroid gland to produce thyroxine, preventing goitre.
50. What are effectors?
Answer: Muscles or glands which respond to the nerve impulses sent from the nervous system.
Conclusion:
We hope this list of 50 important 1-mark questions from the Control and Coordination chapter helps you feel more confident for your Class 10 board exams. Remember, consistent practice is the key to success. Go through these answers, understand the concepts behind them, and you'll be well-prepared to tackle any question that comes your way.
All the best for your exams! 👍
FAQs
Q1: What is the weightage of the Control and Coordination chapter in the Class 10 board exam?
A: The chapter is part of the 'Life Processes' unit, which carries a significant weightage. Typically, you can expect questions worth 5-6 marks from this specific chapter, including 1-mark short answer questions.
Q2: What is the difference between tropic and nastic movements in plants?
A: Tropic movements are directional growth movements in response to a stimulus (like light or gravity), while nastic movements are non-directional movements that are independent of the stimulus's direction (like the closing of a touch-me-not plant's leaves).
Q3: Which diagrams are important from the Control and Coordination chapter?
A: The most important diagrams to practice are the structure of a neuron, the reflex arc, and the human brain.
