HONDROS BIO 253 EXAM 2 ACTUAL 2025/2026 UPDATE

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HONDROS BIO 253 EXAM 2 ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Neurons (Chapter 18) - Answer -Communicating Cells Cell body - Answer --contains ribosomes, rough endoplasmic er, Golgi apparatus -Neurotransmitters are packaged into vesticles -provide proteins for nerve fibers Axon - Answer -- each neuron has 1 axon -carries impulses to target cells Axon Hillock - Answer -Integrates incoming signals Cytoskeleton - Answer --microtubules of microfilaments, as well as neurofibrils (budles of neufilaments) -allows transport of small organelles Classifications of neurons - Answer --Multipolar (motor are typically multipolar) Bipolar(rare, think of retina) Unipolar(pseudounipolar)(sensory are usually unipolar Neurons have a limited capacity to repair themselves - Answer --If the damage is not extensive, the cell body and the neurilemma are intact, and scarring has not occurred than nerve fibers can be repaired Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com Stages of neuron repair - Answer --after injury distal portion of the axon and myelin sheath degenerate -Macrophages remove debris -remaining neurilemma and endoneurium form a tunnel from the point of injury to the effector -new Shawanna cells can grow in the tunnel to maintain a path of regrowth for the axon Glia - Answer -The supporting cells of the central nervous system / 5 types Astrocytes - Answer --Starshaped, Largest and most numerous type of glia -cell extensions connect to neurons and capillaries -transfers the nutrients from the blood to the neuron. -helps form and operate synapse Microglia - Answer --small usually stationary cells -phagocytes Ependymal cells - Answer --lined fluid filled cavities in the CNS -make and circulate Cerebrospinal fluid Oligodendrocytes - Answer --smaller than astrocytes and have fewer processes -hold the nerve fibers together -producer the myelin sheath Neuroglia: Schwann Cells - Answer --Found only in Peripheral neurons -Supportive nerve fibers and form the myelin sheaths Myelin sheaths - Answer --gaps between the segments and the Nodes of Ranvier -Made is segments by glia cells Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com