Neuron Classifications
This neuron type is most abundant in the body
Multipolar Neurons
This type of electrical signal occurs primarily on dendrites and the cell body.
Graded Potentials
This type of postsynaptic potential makes a neuron more likely to generate an action potential.
EPSP
This lobe is primarily responsible for vision.
Occipital Lobe
Name the outermost meninx.
Dura Mater
This neuron is structurally classified as one dendrite and one axon, but no myelin
Bipolar neuron
A signal reaches threshold at the axon hillock and travels down the entire axon without decreasing in strength. What type of signal is this?
Action Potential
This type of postsynaptic potential makes the membrane potential more negative and decreases the likelihood of reaching threshold.
IPSP
This structure serves as the major relay station for sensory information.
Thalamus
CSF is primarily produced by this structure.
Choroid Plexus
This structural classification contains a single process that splits into peripheral and central branches
Unipolar or Pseudounipolar Neurons
Two neurons receive identical stimuli. Neuron A generates a graded potential of 10 mV, while Neuron B generates a graded potential of 20 mV. Both reach threshold and fire an action potential. Which neuron produces the larger action potential?
The Action potential will be the same due to the all or none response.
An EPSP causes the membrane potential to move in which direction relative to the threshold?
Closer to threshold
A patient can understand language but cannot produce meaningful speech. Which area is likely damaged?
Brocas Area
In which space does CSF circulate in the brain and spinal cord?
Neurons of the retina and olfactory epithelium are commonly classified as this structural type.
Bipolar Neurons
A neuron receives a weak stimulus that causes a membrane potential change of only 5 mV. What type of potential is this?
Graded Potential
An IPSP often occurs when channels for this ion open and leave the cell, making the inside more negative.
Potassium or Chloride channels
Potassium out
Chloride in
Damage to this structure would most likely result in poor balance and coordination.
What is the primary function of the blood-brain barrier?
To prevent harmful substances from entering the blood
Which functional neuron type is most likely to be structurally multipolar and located in the spinal cord?
Multipolar Neurons
A toxin prevents a neuron from reaching threshold. Which type of signal can still occur and which cannot?
Graded potential may occur
Action potential will not
A neuron receives one EPSP of +8 mV and one IPSP of -8 mV simultaneously. What is the likely result?
The charges cancel out
AP will not likely happen
This structure regulates body temperature, hunger, and thirst.
Hypothalamus
A blockage prevents CSF from draining properly. What condition may result?
Hydocephalus