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Control and Coordination Video Lecture | Science Class 10

FAQs on Control and Coordination Video Lecture - Science Class 10

1. What is the role of the nervous system in control and coordination in living organisms?

Ans. The nervous system plays a crucial role in control and coordination by transmitting signals between different parts of the body. It consists of the brain, spinal cord, and nerves, which work together to process information from sensory organs, determine appropriate responses, and send commands to muscles and glands. This system allows for quick reactions to stimuli, ensuring the organism can adapt to changes in the environment.

2. How do hormones contribute to control and coordination in humans?

Ans. Hormones are chemical messengers produced by glands in the endocrine system. They travel through the bloodstream to target organs, where they regulate various physiological processes such as growth, metabolism, and mood. Hormones provide a slower but longer-lasting method of control and coordination compared to the nervous system, allowing for the maintenance of homeostasis and coordination of complex bodily functions over time.

3. What are the differences between voluntary and involuntary actions in control and coordination?

Ans. Voluntary actions are those that are consciously controlled, such as moving a limb or speaking. These actions are initiated by the cerebral cortex of the brain and involve skeletal muscles. In contrast, involuntary actions occur automatically without conscious control, such as reflex actions or heartbeats, which are regulated by the autonomic nervous system and involve smooth or cardiac muscles. Understanding these differences helps in studying how organisms respond to internal and external stimuli.

4. Can you explain the concept of reflex actions and their importance in control and coordination?

Ans. Reflex actions are rapid, automatic responses to stimuli that occur without the involvement of conscious thought. They are mediated by reflex arcs, which include sensory receptors, sensory neurons, interneurons in the spinal cord, motor neurons, and effectors (muscles or glands). Reflex actions are important for survival as they allow organisms to respond quickly to dangerous situations, such as pulling away from a hot surface, minimizing the risk of injury.

5. What is the significance of plant hormones in their growth and coordination?

Ans. Plant hormones, also known as phytohormones, are essential for coordinating growth and development in plants. They regulate processes such as cell division, elongation, and differentiation. Key plant hormones include auxins, gibberellins, cytokinins, ethylene, and abscisic acid. For example, auxins promote stem elongation and are involved in the plant's response to light (phototropism). Understanding these hormones helps in agriculture and horticulture for improving crop yields and managing plant growth effectively.

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Sep 02, 2025 Last updated

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