Nodes of ranvier - Study guides, Class notes & Summaries

Final Exam Review - PSYC 375 Questions With 100% Correct Answers The term saltatory conduction refers to the fact that - answeraction potentials occur only at the nodes of Ranvier of axons. If you inserted a micropipette into a neuron without harming the cell, and pumped in a small quantity of calcium ions, each of which carried two positive charges, how would this affect the membrane potential? - answerThe membrane potential would become depolarized relative to the resting potential. Al...

LIFSCI 7B XL - Animation: Reading Phylogenies Copy Questions and Answers Rated A+ What is the role of the axon hillock in neural signaling? The axon hillock integrates incoming signals and determines whether to initiate an action potential. How does myelination affect the speed of action potential propagation along an axon? Myelination increases the speed of action potential conduction by enabling saltatory conduction, where the signal jumps between nodes of Ranvier. Why do vo...

HUBS 191 Progress Test II Latest Version Graded A Nervous system cells neurons and glia Neuron input zone dendrites and cell body Neuron summation zone axon hillock Neuron conduction zone axon Neuron output zone axon terminals Axon hillock decides whether to pass on information Tract axon bundles in CNS Grey matter cell bodies in CNS White matter myelinated axons in CNS; commissural, projection, and association tracts Ganglion groups of cell bodies in PNS Nerv...

Aqa A Level psychology- Biopsychology exam questions and answers 2024 100% pass What components make up the Central Nervous system - Answer-The brain and spinal cord The peripheral nervous system has two divisions, what are they? - Answer-Autonomic nervous system and Somatic Nervous system Which division of the Peripheral Nervous System contains the sympathetic and parasympathetic divisions? - Answer-Autonomic What is the somatic nervous systems role? - Answer-To communicate with sense ...

Which of the following does NOT correctly match a term with its description? Depolarization --- Period during which sodium ions diffuse out of the neuron due to a change in permeability for these ions. Repolarization --- The interior of the cell becomes more negative due to the opening of potassium ion gates. Relative refractory period --- An exceptionally strong stimulus can trigger a response (action potential). Absolute refractory period --- Period during which the neuron cannot respond...

Metastatic calcification - Calcium infiltration into *normal tissue* (Hypervitaminosis D) Dystrophic calcification - Calcium infiltration into *abnormal tissue* (atherosclerosis, atheroma) Caseous degeneration - Degeneration associated with tuberculosis Enzymatic degeneration - Degeneration associated with the pancreas Fatty degeneration - This degeneration is seen in the liver (nutmeg liver)and heart (tabby cat heart). In blood vessels, it begins as a fatty dot -> fatty streak -&...

How do local anesthetics block the nerve impulse from reaching the brain? By permanently depolarizing the nerve cell membrane By overwhelming influx of fluoride ions By blocking sodium channels, thereby preventing nerve cell depolarization and impulse propagation By causing massive neurotransmitter release without uptake. By blocking sodium channels, thereby preventing nerve cell depolarization and impulse propagation How do local anesthetics stop working? By diffusion of the lo...

Pathophysiology: Nervous System Exam Questions with 100% Verified Correct Answers What are the 2 types of cells in the nervous system - Correct Answer Neurons and neuroglia (glial cells) Where are dendrites and what do they do? - Correct Answer Come off of the cell body; receive signals from other cells Where is the axon terminal - Correct Answer Other side of the cell body The axon is the - Correct Answer Long part that connects the cell body to the axon terminal Cell bodies packed...

TEAS Science Test Questions With Verified Answers. Which of the following are parts of a neuron? A) brain, spinal column, and nerve cells B) autonomic and somatic C) dendrites, axon, and soma D) sympathetic and parasympathetic - answerC Which of the following organelles is NOT involved in protein translation or processing? A) ribosome B) rough ER C) mitochondrion D) Golgi apparatus - answerC Which of the following is primarily absorbed in the ileum? A) vitamin K ©BRAINBARTER 2024/...

intercellular ground substance is composed of protein carbohydrate complexes What RNA virus is associated with the common cold? Rhinovirus Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen Brainpower Read More Which generalization is correct about proximal contact areas? Anterior teeth have contact areas that are generally centered faciolingually Slightly damaged tissues completely returns to its normal structure and...