Control and Coordination Class 10 MCQs
Control and Coordination – MCQs with Answers & Explanations
Class: 10 | Subject: Science (Biology)
Section: Control and Coordination
Based on NCERT & CBSE Board Examination Pattern
Section: Control and Coordination
Based on NCERT & CBSE Board Examination Pattern
1. The basic unit of the nervous system is:
Answer: B. Neuron
Neuron is the structural and functional unit of the nervous system. It transmits electrical impulses between brain, spinal cord and body parts.
Neuron is the structural and functional unit of the nervous system. It transmits electrical impulses between brain, spinal cord and body parts.
2. Which part of the brain controls balance of the body?
Answer: B. Cerebellum
Cerebellum coordinates muscular activity and maintains posture and balance while walking or running.
Cerebellum coordinates muscular activity and maintains posture and balance while walking or running.
3. Reflex actions are controlled by:
Answer: B. Spinal cord
Reflex actions are quick automatic responses processed through the spinal cord without waiting for brain decision.
Reflex actions are quick automatic responses processed through the spinal cord without waiting for brain decision.
4. The gap between two neurons is called:
Answer: B. Synapse
Synapse is the junction where nerve impulses pass from one neuron to another using neurotransmitters.
Synapse is the junction where nerve impulses pass from one neuron to another using neurotransmitters.
5. Which hormone regulates growth in humans?
Answer: C. Growth hormone
Secreted by the pituitary gland, it controls body growth and development of bones and tissues.
Secreted by the pituitary gland, it controls body growth and development of bones and tissues.
6. The master gland of the endocrine system is:
Answer: B. Pituitary
Pituitary controls other endocrine glands by releasing stimulating hormones, hence called master gland.
Pituitary controls other endocrine glands by releasing stimulating hormones, hence called master gland.
7. Insulin is secreted by:
Answer: C. Pancreas
Insulin regulates blood glucose levels. Its deficiency causes diabetes.
Insulin regulates blood glucose levels. Its deficiency causes diabetes.
8. Plant hormone responsible for cell elongation:
Answer: A. Auxin
Auxins promote cell elongation and are responsible for phototropism.
Auxins promote cell elongation and are responsible for phototropism.
9. Tropic movements in plants are:
Answer: A. Growth dependent
Tropic movements involve directional growth in response to stimuli like light or gravity.
Tropic movements involve directional growth in response to stimuli like light or gravity.
10. Hydrotropism is response to:
Answer: B. Water
Roots grow towards moisture showing hydrotropism.
Roots grow towards moisture showing hydrotropism.
11. Adrenaline prepares body for:
Answer: B. Fight or flight
Adrenaline increases heart rate, breathing and blood pressure during emergencies.
Adrenaline increases heart rate, breathing and blood pressure during emergencies.
12. The spinal cord is protected by:
Answer: B. Vertebral column
Backbone encloses and protects the delicate spinal cord.
Backbone encloses and protects the delicate spinal cord.
13. Which gland secretes thyroxine?
Answer: B. Thyroid
Thyroxine regulates metabolism and requires iodine for synthesis.
Thyroxine regulates metabolism and requires iodine for synthesis.
14. Lack of iodine causes:
Answer: B. Goitre
Iodine deficiency enlarges thyroid gland leading to goitre.
Iodine deficiency enlarges thyroid gland leading to goitre.
15. Nastic movements are:
Answer: B. Non-directional response
Example: Touch-me-not leaf folding. Movement does not depend on stimulus direction.
Example: Touch-me-not leaf folding. Movement does not depend on stimulus direction.
16. Receptors detect:
Answer: B. Stimuli
Receptors in sense organs detect changes like light, heat, pain etc.
Receptors in sense organs detect changes like light, heat, pain etc.
17. Which hormone regulates blood sugar?
Answer: A. Insulin
Insulin lowers blood glucose by promoting its uptake and storage.
Insulin lowers blood glucose by promoting its uptake and storage.
18. The longest cell in the human body is:
Answer: B. Neuron
Motor neurons can extend from spinal cord to toes, making them longest cells.
Motor neurons can extend from spinal cord to toes, making them longest cells.
19. Phototropism is growth towards:
Answer: C. Light
Shoots grow towards light due to auxin distribution.
Shoots grow towards light due to auxin distribution.
20. Coordination in plants occurs through:
Answer: B. Hormones
Plants lack nerves; chemical hormones control growth and responses.
Plants lack nerves; chemical hormones control growth and responses.