PSYCH 1106 Questions and Answers Latest (Verified Answers)
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Course
PSYCH 1106
Institution
PSYCH 1106
The area where neutrons receive most of their information
- Contain receptors designed to pick up signals from other nerurons - these
signals are interpreted in the Soma - Dendrites
- Cell body
- Contains nucleus
- Takes all info from dendrites and puts it together in the Axonhillock - Soma
A...
PSYCH 1106 Questions and Answers
Latest 2024 - 2025 (Verified Answers)
- The area where neutrons receive most of their information
- Contain receptors designed to pick up signals from other nerurons - these
signals are interpreted in the Soma - ✔✔Dendrites
- Cell body
- Contains nucleus
- Takes all info from dendrites and puts it together in the Axonhillock - ✔✔Soma
Axon - ✔✔A signal will be sent to the ______, a part of the neuron, if the signal
is strong enough
Axon potential - ✔✔Signal
Travels down the axon, covered in Myelin - ✔✔Axon potential
Insulatory material that prevents the signal from degrading - ✔✔Myelin
"Synaptic buttons"
- When the signal reaches the axon terminals, it can cause the release of NT -
✔✔Axon terminals
Neurotransmitter - ✔✔When a _____ is released from axon terminals, it
interacts with the receptors of the dendrites of the next neuron, and the process
repeats with the next neuron
- Neuron-to-neuron connection, fluid filled space
- An area where 2 neutrons come close enough together that they are able to
pass chemical signals from one cell to another - ✔✔Synapse
The narrow gap that separates the presynaptic neuron from the postsynaptic
neuron (<40 nanometers wide) - ✔✔Synaptic cleft
,The neuron where the signal is initiated - ✔✔Presynaptic neuron
The neuron that receives the signal - ✔✔Postsynaptic neuron
Presynaptic neuron - ✔✔The _________ contains neurotransmitters packaged
into small sacs called vesticles
Vesticles - ✔✔Each ____ contains 1000s of Neurotransmitter molecules
Synaptic cleft - ✔✔When the presynaptic neuron is excited by the axon potential
, the vessel fuses with the presynaptic membrane and releases their contents
into the ______________
Axon potential - ✔✔Electrical signal
Postsynaptic membrane - ✔✔Neurotransmitters interact with the the receptors
of the __________ after reaching the presynaptic cleft
Neurotransmitters - ✔✔Neurotransmitters bind with _____, which can cause an
action to occur in the postsynaptic cell
Postsynaptic - ✔✔Action may involve increasing the likelihood that the
__________ cell will become activator and fire an action potential, or decrease it
Diffusion - ✔✔Some neurotransmitters "drift away" by ______ in order to clear
the synaptic cleft
Reuptake - ✔✔Sometimes the neurotransmitter is taken back up into the
presynaptic neuron through _______
Recycled - ✔✔After reuptake, the neurotransmitter can be _____
Synaptic cleft - ✔✔Sometimes enzymes break down the NT within the
_________, and then the component parts of the NT can be sent into the
presynaptic neurone to make more nT
Soma - ✔✔Integrates/evaluates incoming information from other neurons
,Neurotransmitter - ✔✔Chemical substance, alters activity of receiving neuron
Neurotransmitter communication - ✔✔- Electrical charge builds up in neurbody
- If action potential is big enough, charge is sent down the Axon (tail) toward the
synapse
- Myelin sheath on axon speeds up firing
- Messages cross the gap via NT, charging the adjacent neuron
Myelin sheath - ✔✔Speeds up firing on axon
Synaptic vessels - ✔✔Tiny sacs of specific chemicals in axon terminal
Depolarization - ✔✔_____________ occurs in the neuron if sufficiently excited
- Action potentil > 40 millivolts
Hyperpolarization - ✔✔Inhibitory input
Refractory period - ✔✔Decrease intercellular level to below normal resting
potential level
Chemicals - ✔✔________ bind to receptor sites
Electrical state - ✔✔Receiving neurone's _________ changes during synapse
Axons - ✔✔_____ conduct electrical activity
Axon terminal - ✔✔_________ releases NT in synapse
Resting potential of a neuron - ✔✔-70 millivolts
Depolarization - ✔✔__________ occurs when NT bind to the receptors of
Dendrites
, Threshold membrane potential - ✔✔The neuron reaches its _______________
through repeated depolarization of a neuron
Sodium - ✔✔When threshold is reached, a large number of _________
channels open allowing positively charged sodium ions to enter the cell
Positive - ✔✔Threshold causes massive depolarization of the neuron as the
membrane potential reaches 0 and then becomes ________ (Rising phase)
Axon potential - ✔✔Influx of ions creates ________, which then travels down the
neuron
Potassium channels - ✔✔Eventually action potential reaches its peak, and
sodium channels close, allowing ___________ to open and let potassium flow
out of the cell
Potassium - ✔✔Loss of ____________ ions promotes repolarization (Falling
phases)
Refractory period - ✔✔The neuron returns to resting membrane potential but
overshoots, and the cell becomes hyper polarized (_______________)
Refractory period - ✔✔It is difficult to cause the neuron to fire again during the
_____________
Neurotransmitters - ✔✔_________ have a fundamental biological role in
thoughts, feelings, actions
Glutamite, Serotonin, GABA, Dopamine, Norepinephrine, Acetylcholine - ✔✔6
KEY NT
Glutamite - ✔✔Excitartory throughout brain, especially learning and memory
GABA - ✔✔- Inhibitory throughout brain, especially anxiety and motor control
- Schizoprehnia/seizures (deficient G receptors)
Acetylcholine - ✔✔Excitatory, especially memory and muscle control
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