CBSE students who are preparing for their class 11 final exam will get a detailed overview along with the contents of this chapter. Biology is an important subject with a vast syllabus, including Chapter 21, Neural Control and Coordination. This chapter discusses the coordination and understanding of neural control. In our human body, the neural system and endocrine system jointly coordinate and integrate all the activities of the organs so that they can function in a synchronised way. The neural system provides an organised network of point-to-point interrelation for rapid coordination.
This content will help you focus on the important areas that will help you clear your concepts, doubts, and the technique to score highest in this topic. The content table for this topic is mentioned below:
|2||Human Neural System|
|3||Neuron as Structural and Functional Unit of Neural System|
|4||Central Neural System|
|5||Reflex Action and Reflex Arc|
|6||Sensory Reception and Processing|
Coordination is the harmonious functioning of connected organs and body parts. It is applied especially to the process of the motor apparatus of the brain that provides for the association of the groups of muscles. For example, when we do physical exercises, the supply of oxygen increases to maintain increased muscular activity. The increased amount of oxygen facilitates the increased amount of respiration in the body. Along with the increased rate of respiration, heartbeat increases, along with increased blood flow in blood vessels. And when all the physical activities are stopped, the lungs, heart, muscles, nerves, and other organs return to their original state.
The endocrine system or neural system provides chemical integration through hormones. In this chapter, you will learn about concepts and the working of the neural system in the human body, mechanism of neural coordination, transportation of nerve impulses, reflex action, central neural system, sensory reception, and processing.
The neural system consists of highly specialised cells called neurons. Neurons can determine, collect, and transfer different forms of stimuli. The neural arrangement is very simple in lower invertebrates (spineless). For example, worms have dual nerve cords running along the length of the body and merging at the tail and the mouth. Even the simplest organism like Hydra is composed of a network of neurons. The vertebrates have a more developed neural system, where a brain and several ganglia and neural tissues are present.