What is the structure and function of nerves?
Information from receptors passes along neurones as electrical impulses to coordinators such as the central nervous system (CNS). The CNS is the brain and spinal cord. Muscles contracting or glands secreting hormones are the response of effectors coordinated by the CNS.
What is the basic structural unit of the nervous system quizlet?
The basic structural unit of the nervous system. It is also called a nerve cell. It consists of a cell body containing a nucleus;nerve fibers , called dendrites and a single nerve fiber(axon). A nerve fiber that carries impulses toward the cell body.
What is the basic structural unit of the nervous system called?
The basic unit of the nervous system is a nerve cell, or neuron. The human brain contains about 100 billion neurons.
What are the four main parts of a neuron?
A neuron has 4 basic parts: the dendrites, the cell body (also called the “soma”), the axon and the axon terminal. Dendrites – Extensions from the neuron cell body that take information to the cell body. Dendrites usually branch close to the cell body.
What are the 5 functions of the nervous system?
Central Nervous System – what does the brain and spinal cord do?
- maintaining homeostasis.
- interpreting sensory information.
- creating motor responses (movement)
Which is the functional unit of the nervous system?
Neurons are the structural and functional unit of the nervous system. Each neuron consists of dendrites, axon, and soma. Dendrites are the small extension of nerve cells that receive signals from sensory receptors or other neurons. The long extension of the cell body of the nerve cell is called as axon that serves to conduct …
What is the structure of a neuron in the nervous system?
In order to describe the functional divisions of the nervous system, it is important to understand the structure of a neuron. Neurons are cells and therefore have a soma, or cell body, but they also have extensions of the cell; each extension is generally referred to as a process.
What makes up the nervous system of the human body?
So nervous tissue, comprised of neurons and neuroglia, forms our nervous organs (e.g. the brain, nerves). These organs unite according to their common function, forming the evolutionary perfection that is our nervous system. The nervous system (NS) is structurally broken down into two divisions;
How is the function of the nervous system controlled?
It comprises millions of neurones and electrical impulses pass along them very quickly. The conditions inside our body must be carefully controlled if the body is to function effectively. The conditions are controlled in two ways with chemical and nervous responses.
What are the most basic elements of the nervous system?
The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord . The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body. The nervous system transmits signals between the brain and the rest of the body, including internal organs.
What is the unit of structure in the nervous system called?
Neuron is the unit of nervous system: The structural and functional unit of nervous system is called neuron. It is a special type of cell with a cell body and cell processes.
What are the structures and functions of the nervous system?
The nervous system consists of the brain, spinal cord, and a complex network of neurons. This system is responsible for sending, receiving, and interpreting information from all parts of the body. The nervous system monitors and coordinates internal organ function and responds to changes in the external environment.
What is fundamental working unit of the nervous system?
Neuron can be considered as the basic unit of the nervous system, which processes and transmits information by means of electrochemical signals. Sensory neurons respond to external stimuli that affect the sensory organ cells. Motor neurons, on receiving signals from the central nervous system, bring about responses at the target organs.