Neurons are the
the most important type of nerve cells. There are billions of other neurons and they process information to one another and transmit it to other neurons.
The neuron or nerve cell has 2 parts
1. nerve fibers
2. the soma, or cell body
The core of the body is called the
Nucleus, the cell body is covered with a membrane. The axons and dendrites are projections of the cell body and specialize in receiving and conducting stimuli.
Each single cell has a single ____ which is wrapped in a ____________
axon, myelin sheath
Axons are longer fibers than dendrites and have
terminal/end buttons at the tip
Axons send out
impulses generated within the neuron; these impulses are sent away from the cell body to other neurons
Neurons communicate with each other through junctions called _____
It is a chemical process of information exchange at the level of the synapse.
It is a chemical contained within the terminal buttons, helps make contact between two cells by diffusing itself across the synaptic space
_____ and _____ are 2 important neurotransmitters in the motor system.
dopamine and acetylcholine
The 3 basic types of neurons are:
1. motor neurons
2. sensory neurons
These neurons carry sensory impulses form the peripheral sense organs toward the brain.
These neurons transmit impulses away from the central nervous system.
motor/efferent neurons (They cause glandular secretions or muscle contractions)
The most common type of neuron in the nervous system that link neurons with other neurons and help control movement
Many axons, especially the Larger axons of the central nervous system and those in the PERIPHERAL nervous system, have a white insulating sheath called
myelin sheath (Schwann cells and oliodendroglia provide the myelin sheath around the axon. The myelin has breaks at the junction between the cells to facilitate the impulse transfer
The peripheral, autonomic, and central nervous systems are collectively referred to as the
The central building blocks of the nervous system that are composed of a cell body, dendrites, and an axon is a
Some of these nerves have ____________ around them. Various types of nerves transmit impulses to and from the central nervous system