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How is gray matter different from white matter?
White matter consists of neurons that have axons coated in something called myelin, which allows the neuron to fire faster. Gray matter consists of neurons that are not protected by myelin, and fire slower than myelinated neurons.
The axons of some neurons have an insulating coating called?
This is called myelin or myelin sheath. It's made mainly from fat with a few proteins in it, and is produced by oligodendrocyte cells in the CNS and schwann cells in the peripheral nervous system. It speeds up nerve signalling by allowing action potentials (the electric currents that make up nerve impulses) to skip between the gaps in the myelin (nodes of ranvier). In unmyelinated axons, sodium and potassium channels have to create the voltage differences at every single step along the nerve. (Say for example 100 times per nerve). Myelinated neurones only need to create these voltage differences at the nodes of ranvier (where sodium and potassium ion channels are located on myelinated neurones) Say for example there are 10 nodes of ranvier on a myelinated axon. The unmyelinated axon must create this voltage difference 10 times more frequently than the myelinated axon, hence the nerve impulse travels 10 times faster in a myelinated axon. (Based on the random numbers I used. In real life the numbers may be wildly different, but they still work in this way).
Why is the white matter of the spinal cord white?
The white matter of the spinal cord appears white due to the myelin sheaths surrounding the axons of neurons. Myelin is a fatty substance that acts as an insulator, allowing for faster transmission of nerve impulses. The high lipid content of myelin gives the white matter its color.
What class of nutrient produces certain hormones and forms a coating on nerves?
Lipids, specifically phospholipids, are the class of nutrient that can produce certain hormones and form a coating on nerves. These essential fats play a crucial role in cellular structure and signaling, including hormone production and nerve insulation.
At what temperature does fat melt?
Fat melts at a temperature of around 95-113F (35-45C).
What is fat and white and wraps around the fastest axons?
The Myelin sheath is fat and white and wraps around the fastest axons.
Which nutrient is nescessary for production of certain hormone and that forms a coating on nerves?
fat
What is the fatty insulating material that surounds the axons?
The fatty substance around the axons of WHITE MATTER in the brain, and around PERIPHERAL axons is called MYELIN. The axons of GREY matter in the brain are NOT myelinated, nor do they need to be, because the axons travel only short distances. Myelin insulates the axons of neurons so that impulses can travel longer distances along the nerve faster, without losing strength. Without myelin around longer axons (think of it as the rubber coating around electrical wires), the nerve impulses can't travel as fast with constant strength, or may get stopped altogether. Demyelinating diseases such as multiple sclerosis or ALD damage or (for the lack of a better term) dissolve myelin or prevent it from being produced so that nerve signals are unable to travel along the neuron.
The class of nutrient that is necessary for production of certain hormones and that forms a coating on nerves is?
fat
How is gray matter different from white matter?
White matter consists of neurons that have axons coated in something called myelin, which allows the neuron to fire faster. Gray matter consists of neurons that are not protected by myelin, and fire slower than myelinated neurons.
What is the coating on McDonalds chicken nuggets made of?
It's ONLY 30% breading, the ready sugar, oil, and fat
Why is fat located around organs?
Fat is located around organs to protect them.
What is the fat ring around a worm?
the fat ring around a worm is where its heart is.
Am I fat if im around 5'1 and around 100 lbs?
of course your not fat your normal
What percent of a human brain comprises fat?
The myelin insulation around neural axons and glial cells, which is mostly lipid, brings the fat content of an animal brain to about 60%.
In a neuron the myelin sheath serves to insulate?
This insulation acts to increase the rate of transmission of signals. The Myelin Sheath of a neuron consists of fat-containing cells that insulate the axon from electrical activity.
What is excess fat?
It is stored into fat deposit cells around the waist line.
