9 public questions tagged with this topic.
The central nervous system (CNS) processes information and coordinates appropriate responses for the body.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Peripheral and Autonomic Nervous System - Cranial and Spinal Nerves
The spinal cord acts as a communication link between the peripheral nervous system and the brain while also mediating reflexes.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Central Nervous System - Spinal Cord Reflex Action and Reflex Arc
The medulla oblongata connects the brain and spinal cord and controls involuntary functions such as breathing and heart rate.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Central Nervous System - Spinal Cord Reflex Action and Reflex Arc
The central nervous system (CNS) consists of the brain and spinal cord, which process and coordinate information.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Central Nervous System - Spinal Cord Reflex Action and Reflex Arc
The pons contains nerve fibers that connect different regions of the brain and relay information between the brain and spinal cord.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Central Nervous System - Brain - Midbrain and Hindbrain
The medulla oblongata extends from the brain and continues into the spinal cord, controlling involuntary functions.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Anatomy - Nervous System Sense Organs and Reproductive System
As explicitly described in Chapter 6 of the NCERT Class 10 textbook, the highly delicate organs of the central nervous system require incredibly robust protection to function without any physical disruption. The human brain, being a phenomenally complex organ responsible for a multitude of vital tasks, sits securely inside a hard, bony box generally called the cranium or skull. To provide further safeguarding, inside this bony structure, the brain is safely enclosed in a fluid-filled balloon. This fluid is known as the cerebrospinal fluid, which serves as a highly effective shock absorber against sudden jolts or physical trauma. Similarly, the spinal cord, which extends downwards from the brain and fundamentally handles reflex arcs as well as nerve impulse transmission, is structurally protected by the vertebral column, commonly referred to as the backbone, preventing any minor impacts from causing severe neurological damage. Therefore, the rigid vertebral column, or backbone, serves as the primary and highly effective protective enclosure for the spinal cord.
Ref: NCERT Class 10 Science chapter 6 control and coordination
the human brain as the highest and most complex coordinating centre of the body. Together with the spinal cord, it constitutes the Central Nervous System (CNS), which receives information from all parts of the body and integrates it. The brain is broadly divided into three major regions: the forebrain, midbrain, and hindbrain. The forebrain acts as the main thinking part, handling complex voluntary actions, interpreting sensory information from various receptors, and storing memories. In contrast, a multitude of involuntary actions are seamlessly controlled by the midbrain and hindbrain. Specifically, the medulla, a part of the hindbrain, manages vital involuntary functions such as blood pressure, salivation, and vomiting. Additionally, another hindbrain structure, the cerebellum, is responsible for the precision of voluntary actions and strictly maintaining body posture and overall equilibrium during activities like walking or riding a bicycle. This essentially means the CNS is formed exclusively by the combination of the highly protected brain and the spinal cord.
Ref: NCERT Class 10 Science chapter 6 control and coordination
reflex actions represent a crucial and fascinating evolutionary adaptation. A reflex is a sudden, involuntary reaction to a potentially harmful stimulus. The specific pathway taken by the nerve impulses in a reflex action is called a reflex arc. Because the conscious thinking process of the brain is relatively slow and involves complex interactions of many millions of neurons, reflex arcs have evolved to facilitate immediate responses. If we were to consciously think about pulling a hand away from a hot object, we might get burnt before the thought process completes. Therefore, reflex arcs are formed in the spinal cord, where incoming sensory nerves meet outgoing motor nerves, allowing the signal to safely bypass the brain for a rapid, life-saving response, while still sending a message to the brain for later processing. Sensory neurons are the exact specialized nerves tasked with carrying these incoming signals from receptors directly to the spinal cord.
Ref: NCERT Class 10 Science chapter 6 control and coordination
