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ᒪEᗩᖇᑎIᑎG ᒍᑌᑎᑕTIOᑎ
CBSE
CLASS 10 SCIENCE
CHAPTER 7: CONTROL AND COORDINATION
NOTES
1. Control and coordination: Control and coordination are essential functions in living organisms to maintain a proper balance in the body and respond to changes in the environment.
2. Nervous system: The nervous system is responsible for control and coordination in humans. It consists of the central nervous system (CNS) and the peripheral nervous system (PNS). The brain and spinal cord make up the CNS, while the PNS includes nerves that connect the CNS to various body parts.
3. Neurons: Neurons are the basic functional units of the nervous system. They transmit electrical impulses and help in the transmission of messages throughout the body.
4. Reflex action: Reflex actions are involuntary and automatic responses to certain stimuli. They do not involve the brain but are controlled by the spinal cord. Reflex actions help in protecting the body from potential harm.
5. Human brain: The brain is the control center of the body. It receives and interprets information from the sensory organs and sends appropriate signals to various body parts for a response. The brain is divided into three main parts: the forebrain, midbrain, and hindbrain.
6. Endocrine system: The endocrine system works alongside the nervous system to control and coordinate body functions. It consists of various glands that secrete hormones directly into the bloodstream. Hormones help regulate growth, development, metabolism, and other physiological processes.
7. Hormones: Hormones are chemical messengers that are produced by endocrine glands and travel through the bloodstream to target organs or tissues. They regulate the activities of these organs and help maintain homeostasis.
8. Coordination in plants: Plants also exhibit control and coordination through various mechanisms. The plant hormone auxin plays a crucial role in the coordination of plant growth, tropism, and other responses to stimuli.
9. Growth movements in plants: Plants show growth movements in response to external stimuli. Tropic movements occur in response to the direction of the stimulus, such as phototropism (response to light) and geotropism (response to gravity). Nastic movements are independent of the direction of the stimulus, such as thigmonasty (response to touch).
10. Photoperiodism: Photoperiodism is the response of plants to the duration of light and darkness in a day. It influences flowering, dormancy, and other developmental processes in plants.
⭐These are some important points to note from Chapter 7: Control and Coordination in Class 10 Science. It is recommended to refer to your textbook and class notes for a more comprehensive understanding of the topic.
