<p><strong>Step-by-Step Solution:</strong></p><p>1. <strong>Definition of Nodes of Ranvier</strong>: - Nodes of Ranvier are defined as points of discontinuity along the axon of a neuron where the myelin sheath is absent. </p><p>2. <strong>Structure o
Node of Ranvier is a gap between two internodes of an axon. They are periodic gaps within an insulated axon. In other words, nodes of Ranvier can be defined as naked areas of an axon located between internodes. Therefore, an axon is exposed to the extracellular environments at the nodes ...
Define and describe the structure and functions of the mesentery. Define the Sinoatrial node. (a) Define Kupffer cells. (b) What is its function? (a) Define lipase. (b) What is its function? (a) Define ileocecal sphincter. (b) What is its function?
The neurons are long cells that have a cell body, that has a nucleus and most cytoplasm, dendrites that are short extensions and axons that are long extensions with myelin sheath secreted by Schwan cells. Myelin sheath is not continuous but interrupted in between to have a node of Ranvier....
The specific molecular events that underlie the age-related loss of cognitive function are poorly understood. Although not experimentally substantiated, age-dependent neuronal loss has long been considered central to age-related cognitive decline. More recently, age-related changes in brain white matter ...
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is useful on those occasions when unwanted insect visitors settle on the skin. Merkel cells are also in themechanoreceptorsgroup; these receptors adapt much slower than Pacinian corpuscles. When holding a coin in the palm of the hand, the Merkel cells will signal that it is still there after...
What is the difference in function between CNS gray matter and CNS white matter? Where are these tissues located in the brain and spinal cord? What structure is found surrounding axons in both the CNS and the PNS? a. myelin sheath b. neurilemma c. Nodes of Ranvier d. plasma membrane e...
Dendrites are the signal receiving end of the neuron and axons are the signal transduction processes. Axons are surrounded by Schwann cells that produce lipoprotein material called myelin sheaths. Myelin sheath is not a continuous sheath but has gaps called node of Ranvier....