Neuroscience PY 346 Exam 1 IU Practice Questions
with Correct Answers
Neuronal Doctrine - Answer neurons are NOT continuous/communicate by CONTACT
functional unit of the brain - Answer neuron
Lobes of the brain - Answer frontal, parietal, occipital, temporal
glial cells - Answer support, nourish, and protect neurons
glial cell types - Answer astrocytes, oligodendrocytes, microglia, schwann
Astrocytes - Answer help with synapses/control chemical comp of fluid around neurons located in CNS
Oligodendrocytes - Answer Form myelin sheath in CNS
Mircoglia - Answer phagocytosis in CNS
Schwann cells - Answer guides growth of myelin in PNS
ion channels - Answer channel proteins that transport ions
concertration gradient - Answer ions move from high to low conc. thru diffusion
electrical gradient - Answer difference in electrical charges between the inside and outside of the cell
(opposite charges attracts)
, Voltage - Answer great difference between +/- charges, the greater the
movement of current (ions); electrical potential
Ohm's Law - Answer V=IR or Electrical Current (I) = V (diff. of +/-) / Resistance
membrane potential (Vm) - Answer Difference in voltage across the plasma membrane; unevenly
distributed
resting membrane potential - Answer -65 mV
equilibrium potential (Eion) - Answer electrical and concentration gradient for a specific ion
are balanced
sodium-potassium pump - Answer 3 Na+ out, 2 K+ in
action potential - Answer a neural impulse; a brief electrical charge that travels down an axon
how do neurons encode infomation - Answer through frequency and pattern of spikes
phases of action potential - Answer 1 - resting state (-65 mv)
2 - depolarization phase (Na+ channels open)
3 - overshoot (1ms)
4- falling (hyperpolarized; K+ open)
5 - undershoot (depolarize a bit to -65mv) (2ms)
threshold - Answer -40mv; all or none
voltage-gated sodium channels - Answer voltage dependent activation, shifts gates up as it reaches -
40mv
with Correct Answers
Neuronal Doctrine - Answer neurons are NOT continuous/communicate by CONTACT
functional unit of the brain - Answer neuron
Lobes of the brain - Answer frontal, parietal, occipital, temporal
glial cells - Answer support, nourish, and protect neurons
glial cell types - Answer astrocytes, oligodendrocytes, microglia, schwann
Astrocytes - Answer help with synapses/control chemical comp of fluid around neurons located in CNS
Oligodendrocytes - Answer Form myelin sheath in CNS
Mircoglia - Answer phagocytosis in CNS
Schwann cells - Answer guides growth of myelin in PNS
ion channels - Answer channel proteins that transport ions
concertration gradient - Answer ions move from high to low conc. thru diffusion
electrical gradient - Answer difference in electrical charges between the inside and outside of the cell
(opposite charges attracts)
, Voltage - Answer great difference between +/- charges, the greater the
movement of current (ions); electrical potential
Ohm's Law - Answer V=IR or Electrical Current (I) = V (diff. of +/-) / Resistance
membrane potential (Vm) - Answer Difference in voltage across the plasma membrane; unevenly
distributed
resting membrane potential - Answer -65 mV
equilibrium potential (Eion) - Answer electrical and concentration gradient for a specific ion
are balanced
sodium-potassium pump - Answer 3 Na+ out, 2 K+ in
action potential - Answer a neural impulse; a brief electrical charge that travels down an axon
how do neurons encode infomation - Answer through frequency and pattern of spikes
phases of action potential - Answer 1 - resting state (-65 mv)
2 - depolarization phase (Na+ channels open)
3 - overshoot (1ms)
4- falling (hyperpolarized; K+ open)
5 - undershoot (depolarize a bit to -65mv) (2ms)
threshold - Answer -40mv; all or none
voltage-gated sodium channels - Answer voltage dependent activation, shifts gates up as it reaches -
40mv
