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Nellieger
I am studying psychology
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NEUROSCIENCE
Neuroanatomy
Medium Spiny Neurons
The brain’s most common neuron type quietly controls movement by inhibiting others
7 hours ago
0
How do the two primary types of medium spiny neurons contribute differently to motor control?
Both D1-type and D2-type MSNs facilitate movement by activating the same pathway.
Medium spiny neurons are primarily excitatory and do not influence movement control.
D1-type MSNs facilitate movement through the direct pathway, while D2-type MSNs inhibit movement via the indirect pathway.
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New_User_1
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BIOLOGY
Neuroscience
Blood-Brain Barrier
A microscopic gatekeeper fiercely controls what enters the brain’s sanctuary
20 hours ago
0
What is the primary reason the blood-brain barrier selectively allows some substances to pass while blocking others?
To protect the brain from harmful substances while supplying essential nutrients
To allow all blood components to freely enter the brain
Because the brain does not require nutrients from the bloodstream
S
Steve118
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BIOLOGY
Neuroscience
Tau Protein
Tau protein's role flips from protector to poison in brain diseases
23 hours ago
0
What is the primary consequence of abnormal tau protein phosphorylation in neurons?
Increased production of neurotransmitters enhancing brain function
Complete elimination of tau proteins from neurons
Formation of neurofibrillary tangles that disrupt microtubule stability
S
Stevex
Love life
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BIOLOGY
Neuroscience
Amyloid Beta (Aβ) Plaques
The fierce debate over whether Aβ plaques cause or merely mark Alzheimer's disease progression
24 hours ago
0
What is the primary controversy surrounding Aβ plaques in Alzheimer's disease research?
That Aβ plaques only occur in healthy aging brains without any disease association
That Aβ plaques are formed inside neurons rather than extracellularly
Whether Aβ plaques are the cause of neuronal damage or a byproduct of the disease process
B
Bonbo
Me as you
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SCIENCE
Neuroscience
Spatial Disorientation
The brain’s balance systems can trick you into feeling motion that isn’t real during low visibility.
27 hours ago
0
What primarily causes spatial disorientation during poor visibility conditions?
Complete failure of the visual system alone
Conflicting sensory signals from the vestibular, proprioceptive, and visual systems
Only auditory system malfunction
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Steve2222
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NEUROSCIENCE
Neural Circuits
Brain Circuits
Brain circuits form vast networks that enable learning, memory, and complex behaviors.
28 hours ago
0
How does the interconnection of multiple neural circuits affect brain function?
It enables complex behaviors and cognitive functions by integrating different neural activities.
It causes the brain to function as isolated units without communication.
It only serves to slow down brain processing due to excessive connections.
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Bonbo
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BIOLOGY
Neuroscience
Retinal Ganglion Cells
Retinal ganglion cells act as selective gatekeepers, filtering visual data before it reaches the brain
29 hours ago
0
How do amacrine cells influence the function of retinal ganglion cells in visual processing?
They directly transmit raw photoreceptor signals to the brain without modification.
They create functional subunits that help ganglion cells detect small movements, refining the visual information sent to the brain.
They inhibit retinal ganglion cells from sending any visual information to the brain.
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PeterPan
Interested in JM Barrie and other children’s writers
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BIOLOGY
Neuroscience
Vestibular System
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Inner ear labyrinth orchestrates balance and spatial awareness beyond simple stability
34 hours ago
Contrary to popular belief, the vestibular system is not just about keeping you upright; it is a master coordinator of your body's dance with gravity and motion. Hidden deep within the inner ear, this intricate...
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Nellieger
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BIOLOGY
Neuroscience
Nerve Impulse Transmission
Variations in nerve signal speed reveal hidden neurological disorders
42 hours ago
0
Why does damage to myelin significantly reduce nerve conduction velocity?
Because myelin generates the electrical impulses in nerves.
Because myelin slows down impulses to protect nerve cells from damage.
Because myelin enables rapid impulse transmission by allowing signals to jump between nodes.
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Feefo
Writer, polemicist and truth teller
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BIOLOGY
Neuroscience
Nerve Tract
Brain's hidden highways reveal complex communication beyond simple wiring
46 hours ago
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Which type of nerve tract connects the two cerebral hemispheres at the same level, facilitating interhemispheric communication?
Commissural fibers
Association fibers
Projection fibers
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Bonbo
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NEUROSCIENCE
Neuroanatomy
Angular Gyrus
A single brain region juggles language, math, and spatial skills in a complex neural dance
2 days ago
0
How does the angular gyrus illustrate the brain's ability to integrate multiple cognitive functions?
By functioning solely as a visual processing center without involvement in language or math.
By serving as a hub that connects language, numerical, and spatial processing, enabling complex cognitive tasks.
By being responsible only for motor control and not involved in higher cognitive functions.
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FordMotor
Ford makes good cars for great people. This is the page for our new F1 team.
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BIOLOGY
Neuroscience
Nerve Signal Transmission
The delicate interplay of electrical and chemical signals in nerves can be disrupted by inherited diseases.
3 days ago
0
What is the primary role of the myelin sheath in nerve signal transmission?
To generate neurotransmitters for synaptic transmission
To insulate the axon and speed up the electrical impulse
To convert electrical signals into chemical signals
J
Johnbarrow
John from Bartow
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BIOLOGY
Neuroscience
Neuron
Neurons compute and communicate with chemical sparks, not just electrical wires
3 days ago
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What is the primary way neurons communicate signals to other cells?
By directly passing electrical currents through physical connections
By generating hormones that travel through the bloodstream
By releasing chemical neurotransmitters across synapses
B
Bonbo
Me as you
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NEUROSCIENCE
Visual Perception
Contrast Sensitivity Function
Vision's secret map reveals why some patterns vanish while others pop into focus
3 days ago
0
Why does the contrast sensitivity function peak at intermediate spatial frequencies rather than at very fine or very coarse patterns?
Because the human visual system is most sensitive to mid-sized patterns, balancing detail and overall shape detection.
Because the eye cannot detect any patterns finer than intermediate frequencies.
Because absolute luminance, not relative contrast, determines visual sensitivity at all frequencies.
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112
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BIOLOGY
Neuroscience
Axon
Axons act as nature's lightning-fast communication cables, crucial for every sensation and movement
4 days ago
0
How does myelination affect the function of axons in the nervous system?
Myelination decreases the speed of electrical impulses to conserve energy.
Myelination has no effect on the speed or efficiency of nerve signal transmission.
Myelination increases the speed of electrical impulse conduction along the axon.
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Brewster
Brewster
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BIOLOGY
Neuroscience
Synapse
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Electrical synapses can create chaotic brain activity despite their direct connections
4 days ago
Contrary to popular belief, synapses are not just simple relay points where neurons pass messages like a baton in a race. Instead, they are complex, dynamic junctions that can dramatically shape how signals are transmitted...
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New_User_1
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BIOLOGY
Neuroscience
Dorsal Root Ganglion
Clusters of neurons outside the spinal cord shape how we feel pain and touch
5 days ago
0
How does the dorsal root ganglion influence sensory signal processing before reaching the spinal cord?
By modulating and filtering sensory inputs through its neurons before signals enter the spinal cord
By generating motor commands that control muscle movement
By acting solely as a passive relay station without altering sensory signals
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Nellieger
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NEUROSCIENCE
Sensory Processing
Neural Integration
Sensory conflicts in the brain reveal how perception is a negotiated reality, not a direct reflection
5 days ago
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How does neural integration resolve conflicting sensory inputs to create coherent perception?
By ignoring all but the strongest sensory input to avoid confusion
By dynamically weighting and combining sensory signals based on context and reliability
By processing each sensory modality independently without interaction
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