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OCCTH 585 Neuro Exam Questions and Answers | 100% Pass

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OCCTH 585 Neuro Exam Questions and Answers | 100% Pass Information flows through neurons from ____ to ____ in the neuron - Answer- dendrite; axon _____ bring a cell to threshold while _____ bring a cell further from threshold - Answer-EPSPs; IPSPs What 3 main things is neuroplasticity capable...

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  • October 6, 2024
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©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024

OCCTH 585 Neuro Exam Questions and
Answers | 100% Pass

Information flows through neurons from ____ to ____ in the neuron - Answer✔✔-

dendrite; axon

_____ bring a cell to threshold while _____ bring a cell further from threshold -

Answer✔✔-EPSPs; IPSPs

What 3 main things is neuroplasticity capable of? - Answer✔✔-- changing the

properties of neurotransmission

- changes in cell properties

- structural/ anatomical changes of cells

How does neuroplasticity change the properties of neurotransmission? (2) -

Answer✔✔-- change in transmitter size

- change in PSP size or shape

How does neuroplasticity change the properties of cells? (3) - Answer✔✔-- size and

shape

- electrical properties (resistance)

- "leakiness" of membrane

What is unmasking? - Answer✔✔-when an injury, event, or illness eliminates the

inputs that a neuron most commonly responds to (i.e. blue --> blue region of brain), the

neuron will become more responsive to the other inputs on the neuron (i.e. yellow -->

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,EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
yellow region of brain) and that new representation will increase; is immediate, involves

exposure of pre-existing synapses, and creates functional changes in the cell

What is dendritic pruning? - Answer✔✔-when dendrites with no active synapses are

retracted to reduce the amount of resources wasted to keep those useless dendrites

alive; changes cellular properties (size and shape) and creates as 'loss of real estate',

decreases energy expenditure

What is collateral sprouting? - Answer✔✔-when neurons sprout new synapses on

bare dendrites (either after pruning of dead synapses or less used working ones)

leading the cell to become more responsive to those new inputs

What can lead to collateral sprouting? - Answer✔✔-more stimulation; higher

representation is driven by high rates of APs

What are the 6 mechanisms of collateral sprouting? - Answer✔✔-- growth of new bits

- requires time

- fill vacancy OR push less used synapses out of the way

- activity dependent

- produces functional changes

Do neurons have to be close to the "free real estate" in order to make new collaterals?

Do they need to already be involved with it? - Answer✔✔-no, the closest ones will

usually get there first, but the axons can grow out 1-2cm to form a connection (any

further = stuff in the way, would take too long and die); no

What signals to other neurons that there is space to form new collaterals and guides

them to it? - Answer✔✔-neurotrophin (released by dendritic spines through APs)
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, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
What are chemoattractants? - Answer✔✔-neurotrophins and other chemical signals

that signal to a neuron to grow their collaterals in that direction

What are chemorepellants? - Answer✔✔-chemical signals that signal to a neuron to

grow their collaterals away from that direction

What structures release chemoattractants and chemorepellants? - Answer✔✔-guide

cells

What is a growth cone? - Answer✔✔-a specialized structure at the end of the axon

that has filopodia that branch out in multiple directions to look for chemoattractive and

chemorepellant signals

Are neurons always responsive to guidance molecules? - Answer✔✔-no, they are

time-locked based on the developmental clock of the embryo; some guidance

molecules can be both a chemoattractant and a chemorepellant depending on the

embryo's current stage of development

A large chemorepellant signal can lead to ____ ____ ____; exposure can also signal

____________________ - Answer✔✔-growth cone collapse; growth of filipodia off

growth of different spots of the neuron

Where are new neurons produced? (3) - Answer✔✔-- subventricular zone (olfactory)

- dentrate gyrus of hippocampus (memory)

- Cerebral cortex

What are neurons and neurogenesis' roles in learning and memory? (3) - Answer✔✔-

- undergo synaptic plasticity to retain memory


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