ICSE Class 7 > Class 7 Notes > Biology > Visual Worksheet: Nervous System
Visual Worksheet: Nervous System
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| 1. What are the main components of the nervous system? |  |
Ans. The nervous system is primarily composed of two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, while the PNS includes all the nerves that branch out from the CNS to the rest of the body.
| 2. How does the nervous system function in responding to stimuli? | |
Ans. The nervous system responds to stimuli through a process known as signal transmission. When a stimulus is detected, sensory receptors send signals to the brain via sensory neurons. The brain processes this information and sends commands through motor neurons to effectors, such as muscles or glands, resulting in a response to the stimulus.
| 3. What is the role of neurons in the nervous system? | |
Ans. Neurons are the fundamental units of the nervous system, responsible for transmitting signals throughout the body. They consist of three main parts: the cell body, dendrites, and axon. Dendrites receive signals from other neurons or sensory cells, the cell body processes these signals, and the axon transmits the signals to other neurons or muscles.
| 4. What is the difference between voluntary and involuntary actions? | |
Ans. Voluntary actions are those that are consciously controlled by an individual, such as walking or speaking. In contrast, involuntary actions occur automatically without conscious thought, such as reflex actions (like pulling your hand away from a hot surface) and functions regulated by the autonomic nervous system, like heartbeat and digestion.
| 5. How does the brain coordinate body functions? | |
Ans. The brain coordinates body functions by integrating information received from various sensory inputs, processing it, and sending appropriate responses through the nervous system. Different regions of the brain are specialised for specific functions, such as movement, sensation, memory, and emotion, allowing for efficient coordination of complex activities in the body.
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Document Description: Visual Worksheet: Nervous System for Class 7 2026 is part of Biology Class 7 ICSE preparation. The notes and questions for Visual Worksheet: Nervous System have been prepared according to the Class 7 exam syllabus. Information about Visual Worksheet: Nervous System covers topics like and Visual Worksheet: Nervous System Example, for Class 7 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Visual Worksheet: Nervous System.
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