what is myelin sheath?

Q: When a neuron is at resting potential, what is the internal charge of the neuron?

A: Neurons are a type of cells and a functional unit of the nervous system which is used to transmit…

Q: What is the resting membrane potential, and what is responsible for generating it?

A: The imbalance in a voltage differential between the internal and the external of a cell membrane is…

Q: What are the cells thatproduce the myelin sheath? Ofwhich substance is the myelinsheath formed?

A: Myelin is a fatty membrane which wraps around the nerve exon in a spiral fashion to serve to…

Q: The approximate protein:lipid ratio in the plasma membrane of a myelin cell is: a) 1:10 b) 3:1 c)…

A: Ans - The approximate protein:lipid ratio in the plasma membrane of a myelin cell is 1:4. (a)  #…

Q: What is one reason why most neurons are amiotic?

A: Neurons or nerve cells are cells within the nervous system that transmit information to other nerve…

Q: What is secreted at axon terminals?

A: Axon terminals are present at the end of the axon of a neuron. These are tiny swellings that are…

Q: What is a neuron? How does its structure enable it to perform its functions?

A:

Q: What determines the activity of the voltage-gated Na1 channel?

A: Cell membrane channels are transmembrane channels. These channels are present in the bilayer of the…

Q: Describe how a myelin sheath forms.

A: Myelin sheath refers to as an insulating layer that surrounds the axonal part of the Nerve cells.…

Q: What happens to the membrane potential inside and outside of the cell when Cl- channels are open?

A: Ion channels are integral proteins that provide for the regulated transport of a specific ion, or…

Q: hen a neuron opens voltage-gated Na+ channels, what happens to the membrane potential?

A: Introduction: Voltage-gated Na+ channels initiate and propagate action potentials in neurons and…

Q: What is the function of themyelin sheath? Do all axonspresent a myelin sheath?

A: The insulating covering around the nerve cell is termed as the myelin sheath. The myelin sheath is…

Q: How do depolarization and repolarization occur in the conductive segment of a neuron?

A: When the electrical potential difference surrounding the plasma membrane of neuron caused action…

Q: Why is Myelin made up of Lipids and protein macromolecules?

A: Myelin is a sheath-like substance that surrounds nerve fibres, insulating & protecting them.…

Q: Why are synaptic vesicles present in axon but not in dendrites

A: There is a sac-like structure present in the neurons, called synaptic vesicles. The function of the…

Q: Which of the following glial cells provide myelin in the central nervous system?

A: The central nervous system is composed of the brain and the spinal cord. The brain is a complex…

Q: What happens to the membrane potential inside and outside of the cell when K+ channels are open?

A: Potassium Channels are actually membrane proteins that allows  K+ ions to come in across the cell…

Q: What types of ion channels are most important for conduction of a nerve impulse?

A: The neurons form the structural and functional unit of the nervous system. The central nervous…

Q: Describe the general structure of a neuron and explain their functions -axons, dendrites, cell body,…

A: Nervous system coordinates and controls the activities of the animals. It is responsible for…

Q: What is Somatic receptors?

A: Receptors are the proteins which are embedded on the cell membrane of both prokaryotes and…

Q: Which two types of neuroglia form insulating coverings called myelin sheaths?

A: Neuroglia refers to the nervous system's non-neuronal cells (both central nervous system and…

Q: What two factors generate the resting membrane potential?

A: Resting potential can be defined as the imbalance of the electrical charge between the interior and…

Q: What is the functional advantage of myelination?

A: The neuron or nerve cell is the fundamental unit of the nervous system. This is divided into three…

Q: What is the function of myelin sheaths? Where are they found?

A: The nervous system is the network of neurons and nerve fibers that functions to transmit nerve…

Q: What happens to the membrane potential when a nerve cell is stimulated?

A: The human nervous system consists of billions of nerve cells and supporting cells, neuroglial cells.…

Q: What is an important characteristic of ion channels?

A: Introduction: Ion channels are membrane proteins that form pores for ions to pass through the pore…

Q: What is the effect of Cl-Cl¯-channel opening on the excitability of a neuron?

A: Membrane potential occurs due to the ion movement in one direction. The changes in membrane…

Q: What is the resting membrane potential? How does electrical activity change during an action…

A: Neurons are the fundamental units of the nervous system. A neuron is made up of three important…

Q: What happens to the neuronal cell if the Na+-K+ ATPase pump is damaged?

A: The nervous system is one of the vital systems of a body. It is a system of nerves which carry…

Q: When does the membrane gets depolarized?

A: The presence of opposing electrical charges on either side of a cell membrane is referred to as…

Q: What role does potassium play in the action potential process.

A: The action potential is caused when the membrane potential of a specific cell rises and falls. This…

Q: Which component of the neuron sends action potentials away from the cell body?

A: A neuron is a building block of the nervous system. There are millions of neurons present in our…

Q: How is synaptic transmission terminated in the synapse or at the terminal button?

A: INTRODUCTION: The process through which a neuron can communicate with a target cell across a synapse…

Q: What kinds of changes in ion conductance may be expected in an action potential? And how do ion…

A: An action potential takes place if the membrane potential of a particular cell location rises and…