BIOLOGICAL BASES OF BEHAVIOR
BIOLOGICAL PSYCHOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a cell that serves as the basic building block of the nervous system
|
|
|
a layer of fatty tissue that encases the fibers of many neurons
|
|
|
an antagonist molecule that blocks neurotransmitter receptor sites
|
|
|
the extension of a neuron that carries messages away from the cell body
|
Detailed explanation-1: -axon, also called nerve fibre, portion of a nerve cell (neuron) that carries nerve impulses away from the cell body. A neuron typically has one axon that connects it with other neurons or with muscle or gland cells. Some axons may be quite long, reaching, for example, from the spinal cord down to a toe.
Detailed explanation-2: -Dendrites usually branch close to the cell body. Cell body (soma)-the part of the cell that contains the nucleus. Axon-the extension from the neuron cell body that takes information away from the cell body. A single axon projects out of the cell body.
Detailed explanation-3: -Dendrites bring electrical signals to the cell body and axons take information away from the cell body. Neurons communicate with each other through an electrochemical process. Neurons contain some specialized structures (for example, synapses) and chemicals (for example, neurotransmitters).
Detailed explanation-4: -The axon conducts messages away from the cell body.
Detailed explanation-5: -An axon typically develops side branches called axon collaterals, so that one neuron can send information to several others. These collaterals, just like the roots of a tree, split into smaller extensions called terminal branches. Each of these has a synaptic terminal on the tip.