NEURON FUNCTION TESTED QUESTIONS
AND COMPLETE SOLUTIONS
◉ Membrane Potential
Answer: The difference in electrical charge between the inside
and outside of a cell
◉ Resting potential
Answer: The potential difference when a cell is at rest or inactive;
about -70 mV in neurons
◉ Depolarization
Answer: A change in a cell membrane potential from rest towards
zero; due to influx of sodium ions
◉ Action potential
Answer: Change of membrane potential in response to a threshold
stimulus that results in transmission of an electrical signal; also
known as an impulse
◉ Repolarization
Answer: Return of the membrane potential to its normally
negative membrane potential after an action potential
, ◉ Refractory Period
Answer: The time after an action potential when another action
potential cannot be generated; ensures that an action potential
goes in one direction
◉ Bipolar neurons
Answer: Type of neuron located in the eyes, nose, and ears with
two extensions out of the cell body
◉ Unipolar neurons
Answer: Type of neuron with one extension that leads into a
peripheral branch and a central branch
◉ Ganglia
Answer: Specialized masses of nervous tissue (cell bodies) which
are located outside the brain and spinal cord
◉ Multipolar neurons
Answer: Neurons with many extensions from the cell body where
only one is an axon
◉ Sensory (Afferent) Neurons
Answer: Neurons that carry impulses from peripheral body parts
into the brain or spinal cord
AND COMPLETE SOLUTIONS
◉ Membrane Potential
Answer: The difference in electrical charge between the inside
and outside of a cell
◉ Resting potential
Answer: The potential difference when a cell is at rest or inactive;
about -70 mV in neurons
◉ Depolarization
Answer: A change in a cell membrane potential from rest towards
zero; due to influx of sodium ions
◉ Action potential
Answer: Change of membrane potential in response to a threshold
stimulus that results in transmission of an electrical signal; also
known as an impulse
◉ Repolarization
Answer: Return of the membrane potential to its normally
negative membrane potential after an action potential
, ◉ Refractory Period
Answer: The time after an action potential when another action
potential cannot be generated; ensures that an action potential
goes in one direction
◉ Bipolar neurons
Answer: Type of neuron located in the eyes, nose, and ears with
two extensions out of the cell body
◉ Unipolar neurons
Answer: Type of neuron with one extension that leads into a
peripheral branch and a central branch
◉ Ganglia
Answer: Specialized masses of nervous tissue (cell bodies) which
are located outside the brain and spinal cord
◉ Multipolar neurons
Answer: Neurons with many extensions from the cell body where
only one is an axon
◉ Sensory (Afferent) Neurons
Answer: Neurons that carry impulses from peripheral body parts
into the brain or spinal cord
