Learning about the Nervous System for CBSE Biology Exams

The nervous system plays a vital role in many aspects of our lives. For example, it helps us to move our limbs and breathe. It also helps to control our emotions and thoughts. The nervous system is responsible for managing all the activities of the body. It enables us to think, plan, and reason. It also controls our muscles and our reactions to pain. You must understand the basics for getting a good grasp on biology solutions in class 12

What is the nervous system?

The nervous system controls our body’s muscles, organs, and other methods. The nervous system comprises a series of interconnected cells called neurons. Each neuron sends signals to other neurons through the release of neurotransmitters. The nervous system is located in the brain and spinal cord. The brain controls the entire body, while the spinal cord coordinates movement between the different body parts. The nervous system is critical for our survival because it allows us to communicate with our environment and control our body’s functions.

The Nervous System of the Body

The nervous system controls and regulates the body’s various functions. It consists of a network of nerves that connect different body parts. The nervous system helps to maintain the body’s muscles and organs. The nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is located in the brain and spinal cord. It consists of the brain, spinal cord, and nerves that exit from the brain and travel throughout the body. The PNS consists of sensory nerves, which send information from the body to the CNS.

The Brain and the Nervous System

The brain and the nervous system are two essential parts of the body. They work together to control all the activities of the body. The brain is located in the skull and consists of some different parts. The cerebrum is the most significant part of the brain and is responsible for thinking, planning, and reasoning. The cerebrum is divided into the left and right cerebral hemispheres.

The spinal cord connects the brain to the rest of the body. It contains nerve cells that carry information from the brain to all body parts. The spinal cord also has spinal cord receptors to feel pain. The nervous system is made up of several different kinds of cells. Some cells transmit signals between different parts of the body. Other cells send signals from one part of the body to another.

Sensory Input

One of the ways that the brain receives sensory information is through the senses. There are five primary senses: sight, hearing, smell, taste, and touch. Each mind sends different types of sensory information to the brain. Sight is the sense that humans use most frequently. It is what allows us to see things around us. The sight sends information about light and color to the brain. This information is used to interpret what we are seeing.

Somatosensory Plexus

The somatosensory system deals with the class 12th biology chapter and is responsible for sending information about the body’s location, movement, and sensations to the brain. It includes the five senses of touch, pain, temperature, vibration, and pressure. The most common type of somatosensory input is tactile sensation. This involves feeling something with your hands or feet.

Tactile sensation is essential for things like picking up objects, typing on a computer, and playing the violin. Some other types of somatosensory input include proprioception (knowing where your body is in space), nociception (feeling pain), and exteroception ( sensing the environment around you). The somatosensory system is located in the spinal cord below the brain. It sends signals to different parts of the brain based on what type of input it is receiving.

Sensory Output of the Nervous System

One of the essential functions of the nervous system is to send information about the body’s surroundings to the brain. This information is used to control many aspects of our behavior. There are five senses that the nervous system uses to send information about the environment: sight, smell, taste, touch, and hearing. Each purpose produces a different type of sensory output. The company makes the visual output; smell has olfactory output, bite produces gustatory output, the touch produces tactile output, and hearing produces auditory output.

Different parts of the brain

Each type of sensory output is sent to different parts of the brain. Visual information is sent to the occipital lobe of the brain, which processes images and makes them available for interpretation. Olfactory information is sent to the cerebrum, which processes smells and makes them open to memory and performance. Gustatory information is sent to the insula cortex, which processes tastes and makes them available to emotion and memory.

Tactile information is sent to the somatosensory cortex, which processes touch and makes them available for movement and sensation. Auditory information is sent to the temporal lobe, which processes sounds and makes them available to speech and language.


Some motor signals are transmitted through the spinal cord directly to the muscle cells. Other motor signals are transmitted through nerves that run from the spinal cord down into the muscle cells. This is called innervation.

When we want a muscle to contract, we use a neuromuscular junction (NMJ). This is a point on the nerve where it joins with the muscle cell. The NMJ contains particular proteins that allow electrical impulses to travel directly from the nerve into the muscle cell. When we want a muscle to relax, we use an NMJ that does not contain these particular proteins. Instead, we use neuromuscular transmission. Infinity Learn provides the accurate biology solutions in class 12

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