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

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

Glycine

GABA

Glutamate

2 / 40

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

Dopamine

Glutamate

GABA

3 / 40

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

Thalamus

Medulla oblongata

Cerebellum

4 / 40

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

Parietal lobe

Occipital lobe

Temporal lobe

5 / 40

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

Oligodendrocytes

Astrocytes

Schwann cells

6 / 40

What is the main function of the hippocampus?

Visual processing

Motor control

Memory formation

7 / 40

Which ion is most important for generating an action potential?

Calcium

Chloride

Sodium

8 / 40

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

Amygdala

Cerebellum

Hypothalamus

9 / 40

What happens during repolarization?

Sodium ions enter the cell

Potassium ions exit the cell

Calcium ions enter the cell

10 / 40

What is the function of Schwann cells?

Produce myelin in the PNS

Form the blood-brain barrier

Remove waste products

11 / 40

What happens during depolarization?

Potassium ions exit the cell

Chloride ions enter the cell

Sodium ions enter the cell

12 / 40

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

Neuron fires only partially

Neuron fires in graded manner

Neuron fires completely or not at all

13 / 40

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

Graded potential

Synaptic delay

Refractory period

14 / 40

What is the function of glial cells?

Generate action potentials

Support and protect neurons

Transmit sensory signals

15 / 40

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

Axon hillock

Node of Ranvier

Synapse

16 / 40

What is the main function of the autonomic nervous system?

Process sensory information

Regulate involuntary functions

Control voluntary movements

17 / 40

What happens during hyperpolarization?

Membrane potential becomes more positive

Membrane potential becomes more negative

Membrane potential remains the same

18 / 40

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

Mechanically-gated channel

Voltage-gated channel

Ligand-gated channel

19 / 40

What is neuroplasticity?

Brain's growth rate

Brain's ability to change

Brain's immune response

20 / 40

What is the resting membrane potential of a typical neuron?

0 mV

-70 mV

-30 mV

21 / 40

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

Calcium leak channels

Sodium leak channels

Potassium leak channels

22 / 40

What neurotransmitter is primarily involved in muscle contraction?

Dopamine

Acetylcholine

Serotonin

23 / 40

What is the role of neurotransmitters in the nervous system?

Form the myelin sheath

Maintain resting potential

Transmit signals across synapses

24 / 40

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

Maintain ion gradients

Synthesize proteins

Transmit signals

25 / 40

What is long-term potentiation (LTP)?

Weakening of synapses

Generation of new neurons

Strengthening of synapses

26 / 40

What type of synapse involves direct electrical communication between neurons?

Mixed synapse

Chemical synapse

Electrical synapse

27 / 40

Which part of the neuron receives incoming signals?

Axon

Dendrites

Soma

28 / 40

What is the function of the myelin sheath?

Store neurotransmitters

Support neurons

Increase signal speed

29 / 40

What is the role of the blood-brain barrier?

Produces cerebrospinal fluid

Transmits signals

Protects the brain

30 / 40

What is the synaptic cleft?

Part of the axon

Area within the dendrite

Space between neurons

31 / 40

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

fMRI

EEG

CT scan

32 / 40

Which brain imaging technique measures electrical activity?

MRI

PET

EEG

33 / 40

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

Soma

Dendrite

Axon

34 / 40

What part of the brain controls voluntary movement?

Hippocampus

Motor cortex

Hypothalamus

35 / 40

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

Synaptic delay

Relative refractory period

Absolute refractory period

36 / 40

What is the main role of the thalamus?

Regulate motor activity

Relay sensory information

Control endocrine function

37 / 40

What is the refractory period in neuronal action potential?

Time of signal reception

Time when neuron can't fire

Time of maximum firing rate

38 / 40

What is the function of the cerebellum?

Process emotions

Store memories

Coordinate movement

39 / 40

What type of receptor is involved in fast synaptic transmission?

Nuclear receptors

Metabotropic receptors

Ionotropic receptors

40 / 40

Which neurotransmitter is often associated with mood regulation?

Acetylcholine

Serotonin

Glutamate

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