Hondros Bio 253 exam 2 with complete
solutions| 2026/2027
Neurons (Chapter 18)
Communicating Cells
Cell body
-contains ribosomes, rough endoplasmic er, Golgi apparatus
-Neurotransmitters are packaged into vesicles
-provide proteins for nerve fibers
Axon
,- each neuron has 1 axon
-carries impulses to target cells
Axon Hillock
Integrates incoming signals
Cytoskeleton
-microtubules of microfilaments, as well as neurofibrils (bundles of neurofilaments)
-allows transport of small organelles
, Classifications of neurons
-Multipolar (motor are typically multipolar)
Bipolar(rare, think of retina)
Unipolar(pseudounipolar)(sensory are usually unipolar
Neurons have a limited capacity to repair themselves
-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
solutions| 2026/2027
Neurons (Chapter 18)
Communicating Cells
Cell body
-contains ribosomes, rough endoplasmic er, Golgi apparatus
-Neurotransmitters are packaged into vesicles
-provide proteins for nerve fibers
Axon
,- each neuron has 1 axon
-carries impulses to target cells
Axon Hillock
Integrates incoming signals
Cytoskeleton
-microtubules of microfilaments, as well as neurofibrils (bundles of neurofilaments)
-allows transport of small organelles
, Classifications of neurons
-Multipolar (motor are typically multipolar)
Bipolar(rare, think of retina)
Unipolar(pseudounipolar)(sensory are usually unipolar
Neurons have a limited capacity to repair themselves
-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
