Neurophysics MCQs with Answers

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Neurophysics Online Quiz

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• Test Name: Neurophysics MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Neurophysics

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1 / 40

Which neurotransmitter is often associated with mood regulation?

Serotonin

Glutamate

Acetylcholine

2 / 40

Which ion is most important for generating an action potential?

Sodium

Calcium

Chloride

3 / 40

What neurotransmitter is primarily involved in muscle contraction?

Serotonin

Dopamine

Acetylcholine

4 / 40

Which brain imaging technique measures electrical activity?

PET

EEG

MRI

5 / 40

What is the role of the blood-brain barrier?

Protects the brain

Produces cerebrospinal fluid

Transmits signals

6 / 40

What happens during depolarization?

Sodium ions enter the cell

Potassium ions exit the cell

Chloride ions enter the cell

7 / 40

What part of the brain controls voluntary movement?

Hippocampus

Motor cortex

Hypothalamus

8 / 40

What is the synaptic cleft?

Space between neurons

Part of the axon

Area within the dendrite

9 / 40

What is the main function of the autonomic nervous system?

Control voluntary movements

Regulate involuntary functions

Process sensory information

10 / 40

What is neuroplasticity?

Brain's growth rate

Brain's ability to change

Brain's immune response

11 / 40

What is the resting membrane potential of a typical neuron?

-70 mV

-30 mV

0 mV

12 / 40

What term describes the gap between the axon terminal and the dendrite of the next neuron?

Synapse

Axon hillock

Node of Ranvier

13 / 40

What is the refractory period in neuronal action potential?

Time of maximum firing rate

Time when neuron can't fire

Time of signal reception

14 / 40

What type of synapse involves direct electrical communication between neurons?

Electrical synapse

Mixed synapse

Chemical synapse

15 / 40

What brain structure is involved in regulating sleep-wake cycles?

Amygdala

Hypothalamus

Cerebellum

16 / 40

What is the function of Schwann cells?

Produce myelin in the PNS

Remove waste products

Form the blood-brain barrier

17 / 40

What is the function of the myelin sheath?

Increase signal speed

Store neurotransmitters

Support neurons

18 / 40

Which part of the neuron receives incoming signals?

Axon

Soma

Dendrites

19 / 40

What is the function of glial cells?

Transmit sensory signals

Generate action potentials

Support and protect neurons

20 / 40

What is the role of neurotransmitters in the nervous system?

Form the myelin sheath

Maintain resting potential

Transmit signals across synapses

21 / 40

What is the main function of the hippocampus?

Visual processing

Memory formation

Motor control

22 / 40

What is the role of the sodium-potassium pump in neurons?

Maintain ion gradients

Transmit signals

Synthesize proteins

23 / 40

What is the primary inhibitory neurotransmitter in the central nervous system?

GABA

Dopamine

Glutamate

24 / 40

What is long-term potentiation (LTP)?

Generation of new neurons

Strengthening of synapses

Weakening of synapses

25 / 40

What happens during hyperpolarization?

Membrane potential becomes more positive

Membrane potential becomes more negative

Membrane potential remains the same

26 / 40

What happens during repolarization?

Potassium ions exit the cell

Calcium ions enter the cell

Sodium ions enter the cell

27 / 40

What type of glial cell produces myelin in the central nervous system?

Astrocytes

Schwann cells

Oligodendrocytes

28 / 40

What mechanism ensures one-way propagation of an action potential?

Synaptic delay

Graded potential

Refractory period

29 / 40

Which brain region is crucial for regulating heart rate and breathing?

Thalamus

Cerebellum

Medulla oblongata

30 / 40

What is the term for the brief period after an action potential during which a neuron cannot fire?

Relative refractory period

Synaptic delay

Absolute refractory period

31 / 40

What is the main role of the thalamus?

Regulate motor activity

Relay sensory information

Control endocrine function

32 / 40

What is the function of the cerebellum?

Coordinate movement

Process emotions

Store memories

33 / 40

What area of the brain is responsible for processing visual information?

Temporal lobe

Parietal lobe

Occipital lobe

34 / 40

What is the primary excitatory neurotransmitter in the central nervous system?

Glutamate

Glycine

GABA

35 / 40

What type of ion channel opens in response to a change in membrane potential?

Ligand-gated channel

Voltage-gated channel

Mechanically-gated channel

36 / 40

What does an action potential's all-or-none principle mean?

Neuron fires in graded manner

Neuron fires completely or not at all

Neuron fires only partially

37 / 40

Which ion channel is primarily responsible for maintaining the resting membrane potential?

Calcium leak channels

Sodium leak channels

Potassium leak channels

38 / 40

What is a common method to measure brain activity through blood flow changes?

CT scan

EEG

fMRI

39 / 40

Which part of the neuron transmits impulses away from the cell body?

Axon

Dendrite

Soma

40 / 40

What type of receptor is involved in fast synaptic transmission?

Ionotropic receptors

Metabotropic receptors

Nuclear receptors

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