EL FUTBOL, EL DEPORTE DE SIEMPRE, PARA SIEMPRE
Enviado por Breet19 • 24 de Abril de 2015 • 401 Palabras (2 Páginas) • 167 Visitas
What are the functions of the nervous system?
Collects information about the body’s internal and external environment, processes that information and responds to it
What is the peripheral nervous system?
Consists of nerves and supporting cells, collects information about the body’s external and internal environment.
What is the central nervous system?
Consists of the brain and spinal cord, processes the information and creates a response that is delivered to the appropriate part of the body through the peripheral nervous system.
What is the function of neurons?
Nervous system impulses are transmitted by cells
What is a neuron?
The basic unit of the nervous system
What are dendrites?
Spreading out from the cell body are short, branched extensions
What are the functions of sensory neurons?
Carry impulses from the sense organs, such as eyes to the spinal cord and brain
What are the functions of motor neurons?
Carry impulses from the brain and the spinal cord to muscles and glands.
What are the functions of interneurons?
Do the high-level work
What is a cell body?
Largest part of a typical neuron
What is an axon?
The long fiber that carries impulses away from the cell body
What is myelin sheath?
An insulating membrane
How does a nerve impulse begin?
An impulse begins when a neuron is stimulated by another neuron or by the environment
What is a threshold?
Is the minimum level of a stimulus that is required to cause an impulse in a neuron
What is synapse?
Is the point at which neuron transfers an impulse to another cell
What are neurotransmitters?
Are chemicals that transmit an impulse across a synapse to another cell
Where does processing of information occur in the nervous system?
Each of the major areas of the brain – cerebrum, cerebellum, brain stem- are responsible for processing
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