The Neuron Flashcards
The neuron (nerve cell) is a …
specialized cell that is directly involved in mental processes and behavior.
In humans, most of the brain’s neurons are …
present at birth.
Neurons die at a rate of about …
10,000 per day.
Because of their enormous initial quantity, …
less than 2% of the original supply of neurons is lost by the age of 70.
There is also evidence that neurons may …
regenerate through adulthood in some areas of the brain.
The creating of new neurons is referred to as …
neurogenesis.
In the human brain, neurogenesis has been observed in the …
hippocampus and caudate nucleus.
Neurons vary in …
shape, size, and function.
Although they vary in shape, size, and function, most neurons consists of three distinct components:
dendrites, cell body (soma), and axon.
The branch-like dendrites …
receive information from other cells and conduct it toward the cell body.
The soma …
integrates information received from the dendrites and passes it on to the axon.
The cell body contains several structures including the …
nucleus, mitochondria, ribosomes, and Golgi complex.
The mitochondria are sites where …
the cell performs its metabolic activities.
Ribosomes are sites at which …
the cell synthesizes new protein molecules.
Where are ribosomes located within the cell?
Some ribosomes float freely within the cell but others are embedded in the smooth endoplasmic reticulum.
