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Transmission Of Nerve Impulse Across Synapse MDCAT MCQs

Transmission Of Nerve Impulse Across Synapse MDCAT MCQs

Welcome to the Transmission Of Nerve Impulse Across Synapse MDCAT MCQs with Answers. In this post, we have shared Transmission Of Nerve Impulse Across Synapse Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Transmission Of Nerve Impulse Across Synapse MCQs in this MDCAT Online Test.

The neurotransmitter that is commonly involved in transmitting nerve impulses across a synapse is:
a) Insulin
b) Serotonin
c) Acetylcholine
d) Glutamate

Answer
c) Acetylcholine

The gap between two neurons where neurotransmitters are released is called the:
a) Axon
b) Dendrite
c) Synaptic cleft
d) Myelin sheath

Answer
c) Synaptic cleft

Which of the following is a process that occurs during neurotransmission?
a) Reuptake
b) Transcription
c) Translation
d) Replication

Answer
a) Reuptake

The enzyme that breaks down acetylcholine in the synaptic cleft is:
a) Acetylcholinesterase
b) Dopamine
c) Norepinephrine
d) Glutamate

Answer
a) Acetylcholinesterase

Which of the following occurs first in the process of synaptic transmission?
a) Neurotransmitter release
b) Action potential arrival
c) Binding to receptor
d) Enzyme degradation

Answer
b) Action potential arrival

The primary role of synaptic vesicles is to:
a) Transport ions
b) Store neurotransmitters
c) Generate action potentials
d) Degrade neurotransmitters

Answer
b) Store neurotransmitters

Which ion is crucial for the release of neurotransmitters from the presynaptic neuron?
a) Potassium
b) Sodium
c) Calcium
d) Magnesium

Answer
c) Calcium

The process by which neurotransmitters are taken back into the presynaptic neuron is called:
a) Diffusion
b) Reuptake
c) Degradation
d) Exocytosis

Answer
b) Reuptake

The neurotransmitter that is primarily involved in mood regulation is:
a) Norepinephrine
b) Acetylcholine
c) Glutamate
d) Serotonin

Answer
d) Serotonin

Which of the following neurotransmitters is excitatory in the central nervous system?
a) GABA
b) Glycine
c) Glutamate
d) Dopamine

Answer
c) Glutamate

The neurotransmitter that inhibits muscle contraction at the neuromuscular junction is:
a) Norepinephrine
b) Acetylcholine
c) GABA
d) Serotonin

Answer
b) Acetylcholine

What happens to neurotransmitters after they bind to their receptors?
a) They are degraded
b) They are reuptaken
c) They remain bound permanently
d) They diffuse away

Answer
a) They are degraded and b) They are reuptaken

The chemical signal transmitted across the synapse is:
a) An action potential
b) An ion
c) A neurotransmitter
d) A hormone

Answer
c) A neurotransmitter

The role of the postsynaptic membrane is to:
a) Release neurotransmitters
b) Generate an action potential
c) Recycle neurotransmitters
d) Store neurotransmitters

Answer
b) Generate an action potential

Which of the following best describes synaptic transmission?
a) Electrical signal only
b) Chemical signal only
c) Both electrical and chemical signals
d) Physical signal only

Answer
c) Both electrical and chemical signals

The neurotransmitter involved in muscle contraction is:
a) Acetylcholine
b) Serotonin
c) Dopamine
d) Norepinephrine

Answer
a) Acetylcholine

The process of neurotransmitter release into the synaptic cleft is called:
a) Endocytosis
b) Exocytosis
c) Phagocytosis
d) Osmosis

Answer
b) Exocytosis

The primary function of neurotransmitters is to:
a) Store genetic information
b) Transfer electrical signals
c) Transmit signals across synapses
d) Regulate blood flow

Answer
c) Transmit signals across synapses

Which neurotransmitter is associated with the “fight or flight” response?
a) Acetylcholine
b) Dopamine
c) Norepinephrine
d) Serotonin

Answer
c) Norepinephrine

Which neurotransmitter is involved in the regulation of sleep and mood?
a) Acetylcholine
b) GABA
c) Serotonin
d) Glutamate

Answer
c) Serotonin

The synaptic cleft is:
a) The space between two neurons
b) The structure inside the neuron
c) The area around the cell body
d) The junction of two axons

Answer
a) The space between two neurons

Which neurotransmitter is known for its role in inhibiting nerve impulses?
a) Glutamate
b) Acetylcholine
c) GABA
d) Dopamine

Answer
c) GABA

The action of neurotransmitters on the postsynaptic neuron is typically:
a) Inhibitory or excitatory
b) Always excitatory
c) Always inhibitory
d) None of the above

Answer
a) Inhibitory or excitatory

Which of the following statements is true regarding neurotransmitter receptors?
a) They are located on the presynaptic membrane
b) They are located on the postsynaptic membrane
c) They are located in the cytoplasm
d) They are found in the synaptic cleft

Answer
b) They are located on the postsynaptic membrane

The reuptake of neurotransmitters is primarily carried out by:
a) The postsynaptic neuron
b) The presynaptic neuron
c) The synaptic cleft
d) The glial cells

Answer
b) The presynaptic neuron

The rapid depolarization of the postsynaptic membrane is caused by:
a) The influx of sodium ions
b) The efflux of potassium ions
c) The influx of calcium ions
d) The efflux of sodium ions

Answer
a) The influx of sodium ions

Which neurotransmitter is primarily involved in learning and memory?
a) Acetylcholine
b) Norepinephrine
c) Serotonin
d) GABA

Answer
a) Acetylcholine

The role of calcium ions in synaptic transmission is to:
a) Stimulate neurotransmitter release
b) Inhibit neurotransmitter release
c) Degrade neurotransmitters
d) Recycle neurotransmitters

Answer
a) Stimulate neurotransmitter release

Neurotransmitters are stored in:
a) Nucleus
b) Synaptic vesicles
c) Mitochondria
d) Ribosomes

Answer
b) Synaptic vesicles

The process of neurotransmitter degradation in the synaptic cleft is necessary to:
a) Enhance signal transmission
b) Prevent overstimulation of the postsynaptic neuron
c) Increase neurotransmitter release
d) Decrease neurotransmitter release

Answer
b) Prevent overstimulation of the postsynaptic neuron

Which neurotransmitter is known to be involved in mood regulation and well-being?
a) Norepinephrine
b) Dopamine
c) Acetylcholine
d) Serotonin

Answer
d) Serotonin

The neurotransmitter that primarily acts as an inhibitory neurotransmitter in the brain is:
a) Glutamate
b) GABA
c) Acetylcholine
d) Dopamine

Answer
b) GABA

The primary function of synaptic vesicles is to:
a) Generate action potentials
b) Transport neurotransmitters
c) Degrade neurotransmitters
d) Facilitate ion exchange

Answer
b) Transport neurotransmitters

Which neurotransmitter is involved in muscle contraction at the neuromuscular junction?
a) Dopamine
b) Glutamate
c) Acetylcholine
d) Serotonin

Answer
c) Acetylcholine

The influx of which ion into the presynaptic neuron triggers neurotransmitter release?
a) Sodium
b) Potassium
c) Calcium
d) Magnesium

Answer
c) Calcium

Which neurotransmitter is involved in regulating alertness and arousal?
a) GABA
b) Acetylcholine
c) Norepinephrine
d) Dopamine

Answer
c) Norepinephrine

The primary function of the synaptic cleft is to:
a) Allow neurotransmitter diffusion
b) Store neurotransmitters
c) Produce action potentials
d) Recycle neurotransmitters

Answer
a) Allow neurotransmitter diffusion

Which neurotransmitter is associated with pleasure and reward?
a) Glutamate
b) Acetylcholine
c) Dopamine
d) Serotonin

Answer
c) Dopamine

The process of neurotransmitter release into the synaptic cleft occurs through:
a) Endocytosis
b) Exocytosis
c) Diffusion
d) Osmosis

Answer
b) Exocytosis

Which of the following neurotransmitters is primarily involved in inhibitory responses in the central nervous system?
a) Glutamate
b) GABA
c) Acetylcholine
d) Serotonin

Answer
b) GABA

The neurotransmitter that increases the likelihood of an action potential in the postsynaptic neuron is:
a) Inhibitory neurotransmitter
b) Excitatory neurotransmitter
c) Reuptake neurotransmitter
d) Degradative neurotransmitter

Answer
b) Excitatory neurotransmitter

The neurotransmitter involved in mood, appetite, and sleep regulation is:
a) Dopamine
b) Serotonin
c) Norepinephrine
d) GABA

Answer
b) Serotonin

The role of neurotransmitter receptors on the postsynaptic membrane is to:
a) Release neurotransmitters
b) Bind neurotransmitters
c) Degrade neurotransmitters
d) Store neurotransmitters

Answer
b) Bind neurotransmitters

Neurotransmitter release from the presynaptic neuron is triggered by:
a) Membrane depolarization
b) Membrane hyperpolarization
c) Ion efflux
d) Cell division

Answer
a) Membrane depolarization

Which neurotransmitter is associated with attention and cognitive function?
a) Serotonin
b) Dopamine
c) GABA
d) Acetylcholine

Answer
d) Acetylcholine

The enzyme that breaks down dopamine in the synaptic cleft is:
a) Acetylcholinesterase
b) Monoamine oxidase
c) Catechol-O-methyltransferase
d) Glutamate decarboxylase

Answer
b) Monoamine oxidase

The reuptake of neurotransmitters primarily occurs in the:
a) Postsynaptic neuron
b) Presynaptic neuron
c) Synaptic cleft
d) Glial cells

Answer
b) Presynaptic neuron

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