What makes the white matter of the spinal cord appear white quizlet?
Myelin is a fatty substance that covers some axons. It appears white under a microscope and is often referred to as white matter.
What is white matter made of quizlet?
What is white matter? White matter is composed of bundles of myelinated axons, which connect various gray matter areas of the brain to each other, and carry nerve impulses between neurons.
What is the purpose of white matter?
Long thought to be passive tissue, white matter affects learning and brain functions, modulating the distribution of action potentials, acting as a relay and coordinating communication between different brain regions. White matter is named for its relatively light appearance resulting from the lipid content of myelin.
What is the gray and white matter of the spinal cord quizlet?
White matter is the outermost part of the spine, mylineated. Gray matter is in the center of the spine, and it looks like the shape of a butterfly. Do meninges cover the brain and spinal cord?
What is the main difference between white matter and grey matter?
The grey matter contains the cell bodies, dendrites and the axon terminals, where all synapses are. The white matter is made up of axons, which connect different parts of grey matter to each other.
What is the function of the white matter quizlet?
White matter in brain is known as the cerebral white matter. The white matter deep to the cortical gray matter is responsible for communication between cerebral areas and between the cerebral cortex and lower CNS.
What structures make up white matter?
White matter areas of the brain mainly consist of myelinated axons, which are long relays that extend out from the soma, and which are whiteish in color due to the relatively high lipid fat content of the myelin protein that sheathes them, These form connections between brain cells, and white matter is typically …
What is gray matter and white matter quizlet?
White Matter. Bundles of axons each coated with a sheath myelin. Gray Matter. Composed of motor neurons and interneuron cell bodies, dendrites, and unmyelinated axons. Spinal Cord.
What are the three main functions of spinal cord?
The main functions of the spinal cord are:
- To conduct reflexes below the neck.
- To conduct messages from the skin and muscles to the brain.
- To conduct commands from the brain to muscles of the trunk and limbs.
What are the 3 functions of spinal cord?
What does the spinal cord do?
- Motor Functions – directs your body’s voluntary muscle movements.
- Sensory Functions – monitors sensation of touch, pressure, temperature and pain.
- Autonomic Functions – regulates digestion, urination, body temperature, heart rate, and dilation/contraction of blood vessels (blood pressure).
What are the two main functions of the spinal cord?
The spinal cord functions primarily in the transmission of nerve signals from the motor cortex to the body, and from the afferent fibers of the sensory neurons to the sensory cortex. It is also a center for coordinating many reflexes and contains reflex arcs that can independently control reflexes.