Neurons, or nerve cell, are the main structural and functional units of the nervous system. Every neuron consists of a body (soma) and a number of processes (neurites).
Which is the basic structural unit of the nervous system?
The basic unit of the nervous system is a nerve cell, or neuron. The human brain contains about 100 billion neurons. A neuron has a cell body, which includes the cell nucleus, and special extensions called axons (pronounced AK-sonz) and dendrites (pronounced DEN-drahytz).
What is the functional unit of nervous system?
The neuron is the functional unit of the nervous system. Humans have about 100 billion neurons in their brain alone! While variable in size and shape, all neurons have three parts. Dendrites receive information from another cell and transmit the message to the cell body.
What is the structural and functional unit of nervous system name its any two components?
The nervous system structural and functional unit is neuron and its components are dendrite and cell body.
Which is the structural and the functional unit of the nervous system describe with the help of a diagram?
Neurons are the structural and functional unit of the nervous system. … The long extension of the cell body of the nerve cell is called as axon that serves to conduct the nerve impulse away from the cell body. Cyton /soma is the metabolic center of the nerve cell where the metabolic contents are manufactured.
What is nervous system with diagram?
The Central Nervous System is the integration and command center of the body. It consists of the brain, spinal cord and the retinas of the eyes. The Peripheral Nervous System consists of sensory neurons, ganglia (clusters of neurons) and nerves that connect the central nervous system to arms, hands, legs and feet.
What is the main function of nervous system?
The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.
What is the structural and functional unit of life?
The cell (from Latin cella, meaning “small room”) is the basic structural, functional, and biological unit of all known organisms. Cells are the smallest units of life, and hence are often referred to as the “building blocks of life”. The study of cells is called cell biology, cellular biology, or cytology.
What is the structure and function of nervous system?
First, the basic functions of the nervous system are sensation, integration, and response. Secondly, control of the body can be somatic or autonomic—divisions that are largely defined by the structures that are involved in the response.
What are the functional divisions of the nervous system?
Functions of the Nervous System. The nervous system can be functionally divided into 3 actions: sensation, integration, and response. The nervous system is involved in receiving information about the environment around us (sensation) and generating responses to that information (motor responses).
What is the smallest structural and functional unit of nervous system?
1 Answer. The smallest functional unit of the nervous system is a neuron. A neuron is a specialized cell which transmits impulses. … Neurons are the cells that make up the nervous system.
What is the structural and functional unit of the brain?
Neurons. The basic functional unit of the brain is the neuron. … Although there are upwards of 1,000 different types of neurons, they all have the same basic structure and function. Each neuron has a soma, or cell body, that performs all the basic metabolic functions required to keep the cell alive and functioning.
Which is the structural and functional unit of kidney?
Nephron, functional unit of the kidney, the structure that actually produces urine in the process of removing waste and excess substances from the blood. There are about 1,000,000 nephrons in each human kidney.
What are the 4 main functions of the nervous system?
The four main functions of the nervous system are:
- Control of body’s internal environment to maintain ‘homeostasis’ An example of this is the regulation of body temperature. …
- Programming of spinal cord reflexes. An example of this is the stretch reflex. …
- Memory and learning. …
- Voluntary control of movement.