What is the long extension of a nerve cell called?
An axon is a long, hair-like extension of a nerve cell that carries a message to another nerve cell.
Do nerve cells have long cellular extensions?
Neuron Structure The axon is a long extension of the cell body that transmits nerve impulses to other cells. The axon branches at the end, forming axon terminals. These are the points where the neuron communicates with other cells.
What is the fibrous extensions of a nerve cell?
Each axon, within the nerve, is an extension of an individual neuron, along with other supportive cells such as some Schwann cells that coat the axons in myelin. Within a nerve, each axon is surrounded by a layer of connective tissue called the endoneurium….
|Anatomical terms of neuroanatomy|
What is the longest nerve cell in the human body?
Complete answer: Some nerve cells contain axons up to 1 meter long. The neuron which connects the central nervous system (brain and spinal cord) to other parts of the body is the longest cell in the human body.
What are the two types of nerve cells?
Although the nervous system is very complex, there are only two main types of cells in nerve tissue. The actual nerve cell is the neuron. It is the “conducting” cell that transmits impulses and the structural unit of the nervous system. The other type of cell is neuroglia, or glial, cell.
Why do nerve cells have so many extensions?
Dendrites and Axons A nerve cell or neuron has a large cell body with small cytoplasmic extensions branching off from it called dendrites. Your body uses nerve cells and their cytoplasmic extensions as a way to relay ongoing signals to and from your brain, muscles and other tissues.
How many axons does a nerve have?
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.
What is the thickest nerve in the body?
The sciatic nerve is the longest and thickest (almost finger-width) nerve in the body. It’s actually made up of five nerve roots: two from the lower back region called the lumbar spine and three from the final section of the spine called the sacrum.
What do you call the gap between two brain cells?
Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). The typical synaptic cleft is about 0.02 micron wide.
What is the last action potential of a nerve fiber?
-dynein = retrograde transport action potentials are ____________, which means that they do not get weaker with distance. The last action potential at the end of a nerve fiber is just as strong as the first action potential in the trigger zone nondecremental an axon lacking a myelin sheath is said to be _____________
What are the three types of nerve fibers?
Axon dysfunction has caused many inherited and acquired neurological disorders which can affect both the peripheral and central neurons. Nerve fibers are classed into three types – group A nerve fibers, group B nerve fibers, and group C nerve fibers. Groups A and B are myelinated, and group C are unmyelinated.
What is the cytoplasm of an axon called?
Axons are covered by a membrane known as an axolemma; the cytoplasm of an axon is called axoplasm. Most axons branch, in some cases very profusely. The end branches of an axon are called telodendria. The swollen end of a telodendron is known as the axon terminal which joins the dendron or cell body of another neuron forming a synaptic connection.
How to learn more about nervous tissue flashcards?
Learn vocabulary, terms, and more with flashcards, games, and other study tools. HomeBrowse Create Search Log inSign up Upgrade to remove ads Only $2.99/month Chapter 12, Nervous tissue STUDY Flashcards Learn Write Spell Test PLAY Match Gravity Created by Rebekah_Jade Terms in this set (210) signal conduction along myelinated fibers