Motor neurons are cells that carry information from the central nervous system to the muscles and glands, while sensory neurons send signals from body parts to the central nervous system. Sensory neurons are found over the body, such as in the skin, ears, eyes, nose and tongue. Interneurons in the central nervous system allow information to flow between motor and sensory neurons.Know More
The cell body of a neuron holds a nucleus and organelles that carry out basic cell functions, such as protein synthesis, transporting materials and producing energy. A neuron also has special parts that allow information to move. Dendrites are branch-like structures that receive signals. The axon, which often resembles a long tail, takes messages away from the cell. The axon ends in a terminal containing a chemical called a neurotransmitter, which allows the signal to move across the space between the cell that sends information and the cell that receives it. When axons and dendrites of different cells are bunched together, they create nerves. Ganglia are groupings of many neurons' cell bodies.
The processes conducted by nerve cells happen incredibly fast, in thousandths of a second. That is why the human body reacts so quickly to stimuli in the environment. A hand touching a hot stove is removed almost immediately so that serious injury does not occur.Learn more about Nerves
The nervous system functions to process input from sensory receptors, transfer and interpret impulses and to control the functions of body's muscles and organs. The nervous system is comprised of nerves made up of specialized cells known as neurons.Full Answer >
Psychologists study the brain and the nervous system because these parts of the body are essential to the way that people behave, think and feel. Psychology is the scientific study of people's behavior and their mind so studying the brain and nervous system is always going to be a crucial element for psychological study.Full Answer >
The nervous system works by absorbing information through the senses, processing that information through a central brain, and using the information to trigger reactions throughout the rest of the body. The billions of nerve cells, called neurons, that are connected to each other and to other cells in the body transmit the information. In terms of function, the nervous system can be separated into the voluntary and involuntary nervous systems.Full Answer >
According to the ALS Association, amyotrophic lateral sclerosis is a progressive, neurodegenerative disease that destroys motor neurons in the brain and spinal cord, preventing signals from being sent to voluntary muscles. ALS is also commonly referred to as Lou Gehrig's Disease.Full Answer >