Bio 348 Drexel Exam Questions with Correct
Answers
axon hillock
The decision of whether or not to fire the an action potential results from the cumulative
integration of all the inputs to a given neuron. Which region of the neuron performs this
complutational function?
Phrenology (bumps on skull)
Franz Joseph Gall
Cajal
Neuron doctrine-nervous system is composed of individual cells
Occipital lobe
Most caudal region of the brain
2 classes of cells in nervous system
neurons and glia
What makes neurons unique?
polarized cells
Examples of glia cells
ogliodendrites, Schwann cells, Microglia, astrocytes, NG2 cells
Which cell types would produce a reduction in white matter?
Oligodendrocytes
, What is the refractory period of an action potential caused by?
a maximum frequency at which a single neuron can send action potentials
Which ion is most important for neural inhibition?
Chloride
Example of afferent neuron, arriving from pns to cns
sensory neurons
Example of efferent neuron, away from cns?
motor neurons
Interneurons
Betwee same structure, relay between different regions, connections between afferent to
efferent
What is the neurotransmitter that is excitatory?
glutamate
What type of neuron does an excitatatory signal need?
projection neurons because excitatory signals are sent to distant regions
What is the neurotransmitter that is inhibtory?
GABA
Which type of neuron does an inhibitory signal need?
Interneuron neurons because inhibitory signals are sent to neighboring cells
What is the funcion of neuromodulatory signals?
Answers
axon hillock
The decision of whether or not to fire the an action potential results from the cumulative
integration of all the inputs to a given neuron. Which region of the neuron performs this
complutational function?
Phrenology (bumps on skull)
Franz Joseph Gall
Cajal
Neuron doctrine-nervous system is composed of individual cells
Occipital lobe
Most caudal region of the brain
2 classes of cells in nervous system
neurons and glia
What makes neurons unique?
polarized cells
Examples of glia cells
ogliodendrites, Schwann cells, Microglia, astrocytes, NG2 cells
Which cell types would produce a reduction in white matter?
Oligodendrocytes
, What is the refractory period of an action potential caused by?
a maximum frequency at which a single neuron can send action potentials
Which ion is most important for neural inhibition?
Chloride
Example of afferent neuron, arriving from pns to cns
sensory neurons
Example of efferent neuron, away from cns?
motor neurons
Interneurons
Betwee same structure, relay between different regions, connections between afferent to
efferent
What is the neurotransmitter that is excitatory?
glutamate
What type of neuron does an excitatatory signal need?
projection neurons because excitatory signals are sent to distant regions
What is the neurotransmitter that is inhibtory?
GABA
Which type of neuron does an inhibitory signal need?
Interneuron neurons because inhibitory signals are sent to neighboring cells
What is the funcion of neuromodulatory signals?
