OCCTH 585 Final Exams Practice Questions with
Complete Answers
collateral sprouting - ✔✔the process by which axons of some healthy neurons
adjacent to damaged cells grow new branches
collateral sprouting steps - ✔✔1. no input to neuron
2. dendrites start to retract
3. healthy nerve in the area sends out new inputs
4. form new connections on the dendrites
activity dependent - ✔✔a property of neural plasticity such that changes in a
neuron's functioning will occur only if that neuron is active (firing) at the same time as
another neuron
neurogenesis - ✔✔the development of new neurons
neurogenesis locations - ✔✔1. sub ventricular zone (olfactory bulb)
2. dente gyrus of hippocampus
fetal cells - ✔✔basic cells that can be turned into any other cella
activity dependent steps - ✔✔1. neural activity (the firing of APs in neurons
2. release of NT at synapses
3. cell has to be active to take up the signal
4. produce collateral sprouts in neurone that are active
, neurotrophins - ✔✔used to stabilize the position of the synapse
axonal guidance - ✔✔the process by which immature neurons migrate out and axons
grow out towards their target
growth cone - ✔✔growing tip of an axon with filopodia that grow out in many
different directions
growth cone steps - ✔✔1. target cell releases a signal that promotes or inhibits
growth
2. growth cone responds to signal
3. filopodia extend out trying to reach signal
4. filopodia grows towards target
guide cells - ✔✔cells within a growing embryo that produce a chemical signal for
growth that bridge gaps to our target
guide cell steps - ✔✔1. guide cell releases appropriate chemical messenger
2. neurone reaches guide cell
3. guide cell shuts off
4. next guide cell turns on
growth cone collapse - ✔✔occurs when the growth cone comes in contact large
repellant signal and the growth cone retracts
growth cone collapse steps - ✔✔1. growth cone comes near a repellant signal
Complete Answers
collateral sprouting - ✔✔the process by which axons of some healthy neurons
adjacent to damaged cells grow new branches
collateral sprouting steps - ✔✔1. no input to neuron
2. dendrites start to retract
3. healthy nerve in the area sends out new inputs
4. form new connections on the dendrites
activity dependent - ✔✔a property of neural plasticity such that changes in a
neuron's functioning will occur only if that neuron is active (firing) at the same time as
another neuron
neurogenesis - ✔✔the development of new neurons
neurogenesis locations - ✔✔1. sub ventricular zone (olfactory bulb)
2. dente gyrus of hippocampus
fetal cells - ✔✔basic cells that can be turned into any other cella
activity dependent steps - ✔✔1. neural activity (the firing of APs in neurons
2. release of NT at synapses
3. cell has to be active to take up the signal
4. produce collateral sprouts in neurone that are active
, neurotrophins - ✔✔used to stabilize the position of the synapse
axonal guidance - ✔✔the process by which immature neurons migrate out and axons
grow out towards their target
growth cone - ✔✔growing tip of an axon with filopodia that grow out in many
different directions
growth cone steps - ✔✔1. target cell releases a signal that promotes or inhibits
growth
2. growth cone responds to signal
3. filopodia extend out trying to reach signal
4. filopodia grows towards target
guide cells - ✔✔cells within a growing embryo that produce a chemical signal for
growth that bridge gaps to our target
guide cell steps - ✔✔1. guide cell releases appropriate chemical messenger
2. neurone reaches guide cell
3. guide cell shuts off
4. next guide cell turns on
growth cone collapse - ✔✔occurs when the growth cone comes in contact large
repellant signal and the growth cone retracts
growth cone collapse steps - ✔✔1. growth cone comes near a repellant signal
