The main functions of the myelin sheath are: 1) It acts as an electrical insulator for the neurone - it prevents electrical impulses travelling through the sheath. 2) The sheath prevents the movement of …

Feb 6, 2025 · The myelin sheath is a protective covering around nerve fibers that helps speed up the transmission of electrical signals in the nervous system. It acts like insulation on a wire, allowing …

Jun 9, 2024 · The function of the myelin sheath is to enhance the speed and efficiency of nerve signal transmission. Myelin insulation insulates nerve fibers by wrapping around them and forming a …

Describe the structure and function of the myelin sheath? The myelin sheath is a fatty substance which surrounds and insulates neuron axons (i.e. it does not allow potassium or sodium ions to pass …

The axon, the long, thin part of the neurone along which the impulse passes, is covered in a fatty myelin sheath, which acts as an electrical insulator. This increases the speed of transmission by forcing the …

Jun 16, 2024 · Nerve impulse is an electrical current, which flows across the axons. So most of the neurons are surrounded by myelin sheath. This sheath gives insulation to the axons. Brain can not …

What important function could be diminished if the cilia on ependymal cells were absent? O circulation of cerebrospinal fluid O formation of myelin sheath around PNS axons O phagocytosis of …

It inhibits neural growth and a smooth, rapid conduction of neural impulses. It aids in decreasing the exchange of cerebrospinal fluid with intracellular fluid. It reduces produc­tion of the chemicals that …

Neurons and Reflexes 1. Describe the function of the: a) dendrite b) axon c) cell body d) myelin sheath e) nodes of Ranvier f) Schwann cells g) motor neuron, interneuron and sensory neuron 2. List some …

The myelin sheath is a layer of insulating, fatty material that encases some neurones. The sheath is composed of Schwann cells that have gaps called nodes of Ranvier between them.