HONDROS BIO 253 EXAM 2 FREQUENTLY TESTED
ACTUAL QUESTIONS WITH CORRECT ANSWERS
Question 1.
Neurons (Chapter 18)
ANSWER
Communicating Cells
Question 2.
Cell body
ANSWER
-contains ribosomes, rough endoplasmic er, Golgi apparatus -Neurotransmitters are packaged into
vesticles -provide proteins for nerve fibers
Question 3.
Axon
ANSWER
- each neuron has 1 axon -carries impulses to target cells
1
,Question 4.
Axon Hillock
ANSWER
Integrates incoming signals
Question 5.
Cytoskeleton
ANSWER
-microtubules of microfilaments, as well as neurofibrils (budles of neufil- -allows transport of small
organelles
Question 6.
Classifications of neurons
ANSWER
-Multipolar (motor are typically multipolar) Bipolar(rare, think of retina)
Unipolar(pseudounipolar)(sensory are usually unipolar
2
,Question 7.
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
Question 8.
Stages of neuron repair
ANSWER
-after injury distal portion of the axon and myelin sheath degenerate -Macrophages remove debris
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
Question 9.
Glia
ANSWER
The supporting cells of the central nervous system / 5 types
3
, Question 10.
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
Question 11.
Microglia
ANSWER
-small usually stationary cells -phagocytes
Question 12.
Ependymal cells
ANSWER
-lined fluid filled cavities in the CNS -make and circulate Cerebrospinal fluid
4
ACTUAL QUESTIONS WITH CORRECT ANSWERS
Question 1.
Neurons (Chapter 18)
ANSWER
Communicating Cells
Question 2.
Cell body
ANSWER
-contains ribosomes, rough endoplasmic er, Golgi apparatus -Neurotransmitters are packaged into
vesticles -provide proteins for nerve fibers
Question 3.
Axon
ANSWER
- each neuron has 1 axon -carries impulses to target cells
1
,Question 4.
Axon Hillock
ANSWER
Integrates incoming signals
Question 5.
Cytoskeleton
ANSWER
-microtubules of microfilaments, as well as neurofibrils (budles of neufil- -allows transport of small
organelles
Question 6.
Classifications of neurons
ANSWER
-Multipolar (motor are typically multipolar) Bipolar(rare, think of retina)
Unipolar(pseudounipolar)(sensory are usually unipolar
2
,Question 7.
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
Question 8.
Stages of neuron repair
ANSWER
-after injury distal portion of the axon and myelin sheath degenerate -Macrophages remove debris
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
Question 9.
Glia
ANSWER
The supporting cells of the central nervous system / 5 types
3
, Question 10.
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
Question 11.
Microglia
ANSWER
-small usually stationary cells -phagocytes
Question 12.
Ependymal cells
ANSWER
-lined fluid filled cavities in the CNS -make and circulate Cerebrospinal fluid
4
