Monthly Student Online Competition

Transmission Of Action Potential Between Cells–Synapse MCQs

Transmission Of Action Potential Between Cells–Synapse MDCAT MCQs

Transmission Of Action Potential Between Cells–Synapse MCQs: Welcome to the Transmission Of Action Potential Between Cells–Synapse MCQs with Answers. In this post, we have shared Transmission Of Action Potential Between Cells–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 Action Potential Between Cells–Synapse MCQs in this MDCAT Online Test.

Action potentials are transmitted across synapses via:
a) Direct electrical coupling
b) Chemical messengers
c) Mechanical impulses
d) Light signals

Answer
b) Chemical messengers

In a chemical synapse, action potentials trigger the release of neurotransmitters from:
a) Postsynaptic membrane
b) Presynaptic vesicles
c) Synaptic cleft
d) Axon hillock

Answer
b) Presynaptic vesicles

The primary role of neurotransmitters in the synaptic cleft is to:
a) Increase action potential speed
b) Facilitate electrical impulses
c) Transmit signals to the postsynaptic neuron
d) Inhibit signal transmission

Answer
c) Transmit signals to the postsynaptic neuron

Which ion influx is essential for neurotransmitter release at the presynaptic terminal?
a) Sodium
b) Potassium
c) Calcium
d) Chloride

Answer
c) Calcium

The gap between the presynaptic and postsynaptic neurons is known as the:
a) Axon hillock
b) Synaptic cleft
c) Myelin sheath
d) Node of Ranvier

Answer
b) Synaptic cleft

Neurotransmitters bind to receptors located on the:
a) Axon terminal
b) Synaptic vesicle
c) Postsynaptic membrane
d) Presynaptic vesicle

Answer
c) Postsynaptic membrane

The removal of neurotransmitters from the synaptic cleft can occur through:
a) Exocytosis
b) Reuptake
c) Endocytosis
d) Osmosis

Answer
b) Reuptake

The process by which neurotransmitters are broken down in the synaptic cleft is called:
a) Reuptake
b) Degradation
c) Diffusion
d) Endocytosis

Answer
b) Degradation

Which of the following neurotransmitters is involved in muscle contraction at the neuromuscular junction?
a) Dopamine
b) Acetylcholine
c) GABA
d) Serotonin

Answer
b) Acetylcholine

The enzyme responsible for breaking down acetylcholine in the synaptic cleft is:
a) Monoamine oxidase
b) Acetylcholinesterase
c) Catechol-O-methyltransferase
d) Glutamate decarboxylase

Answer
b) Acetylcholinesterase

In an action potential, the depolarization phase is primarily caused by:
a) Calcium influx
b) Sodium influx
c) Potassium efflux
d) Chloride influx

Answer
b) Sodium influx

Which of the following describes the effect of excitatory neurotransmitters on the postsynaptic neuron?
a) Hyperpolarization
b) Depolarization
c) No change in membrane potential
d) Increased neurotransmitter degradation

Answer
b) Depolarization

The term used for the rapid return to resting membrane potential after an action potential is:
a) Repolarization
b) Hyperpolarization
c) Depolarization
d) Refractory period

Answer
a) Repolarization

In chemical synapses, the action potential causes voltage-gated channels to open, allowing:
a) Sodium ions to leave the cell
b) Potassium ions to enter the cell
c) Calcium ions to enter the cell
d) Chloride ions to leave the cell

Answer
c) Calcium ions to enter the cell

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

Answer
a) Bind neurotransmitters

Action potentials are transmitted across the synaptic cleft by:
a) Electrical currents
b) Chemical neurotransmitters
c) Mechanical impulses
d) Direct ion flow

Answer
b) Chemical neurotransmitters

In the synaptic transmission process, the reuptake of neurotransmitters into the presynaptic neuron helps to:
a) Increase neurotransmitter concentration
b) Prevent prolonged stimulation of the postsynaptic neuron
c) Facilitate neurotransmitter degradation
d) Enhance neurotransmitter release

Answer
b) Prevent prolonged stimulation of the postsynaptic neuron

The period during which a neuron cannot generate another action potential is called the:
a) Resting period
b) Refractory period
c) Hyperpolarization period
d) Depolarization phase

Answer
b) Refractory period

Which neurotransmitter is involved in mood regulation and is often targeted by antidepressant medications?
a) Acetylcholine
b) Dopamine
c) Norepinephrine
d) Serotonin

Answer
d) Serotonin

The synaptic vesicles in the presynaptic neuron contain:
a) Neurotransmitters
b) Ions
c) Receptors
d) Enzymes

Answer
a) Neurotransmitters

The main role of the synaptic cleft is to:
a) Facilitate direct electrical connection between neurons
b) Prevent neurotransmitter binding
c) Allow diffusion of neurotransmitters
d) Store neurotransmitters

Answer
c) Allow diffusion of neurotransmitters

Which of the following best describes the process by which neurotransmitters are released from vesicles?
a) Endocytosis
b) Exocytosis
c) Osmosis
d) Phagocytosis

Answer
b) Exocytosis

The binding of neurotransmitters to postsynaptic receptors can lead to:
a) Decreased action potential frequency
b) Increased action potential frequency
c) No change in action potential frequency
d) Direct neurotransmitter degradation

Answer
b) Increased action potential frequency

Which process involves the reuptake of neurotransmitters into the presynaptic neuron?
a) Diffusion
b) Degradation
c) Endocytosis
d) Reuptake

Answer
d) Reuptake

The neurotransmitter that inhibits the postsynaptic neuron and prevents action potentials is:
a) Glutamate
b) Acetylcholine
c) Dopamine
d) GABA

Answer
d) GABA

The action potential triggers neurotransmitter release by:
a) Depolarizing the presynaptic membrane
b) Hyperpolarizing the presynaptic membrane
c) Increasing neurotransmitter reuptake
d) Decreasing ion channel permeability

Answer
a) Depolarizing the presynaptic membrane

Which of the following neurotransmitters is primarily associated with pain modulation and mood regulation?
a) Acetylcholine
b) Norepinephrine
c) Serotonin
d) Dopamine

Answer
c) Serotonin

The process by which neurotransmitters are removed from the synaptic cleft involves:
a) Vesicle recycling
b) Enzymatic degradation
c) Direct uptake by postsynaptic neurons
d) Passive diffusion

Answer
b) Enzymatic degradation

The action potential traveling along an axon is propagated by:
a) Receptor activation
b) Ion channel opening
c) Neurotransmitter release
d) Synaptic cleft diffusion

Answer
b) Ion channel opening

Which of the following is not a common neurotransmitter?
a) Glutamate
b) Acetylcholine
c) Insulin
d) Norepinephrine

Answer
c) Insulin

The effect of a neurotransmitter on the postsynaptic cell depends on:
a) Its concentration in the synaptic cleft
b) The type of neurotransmitter receptor it binds to
c) Its degradation rate
d) Its rate of release

Answer
b) The type of neurotransmitter receptor it binds to

During the depolarization phase of an action potential, the membrane potential becomes:
a) More negative
b) More positive
c) Unchanged
d) Completely zero

Answer
b) More positive

The presynaptic neuron’s action potential results in:
a) Neurotransmitter reuptake
b) Neurotransmitter release into the synaptic cleft
c) Direct activation of postsynaptic receptors
d) Inhibition of postsynaptic receptors

Answer
b) Neurotransmitter release into the synaptic cleft

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

Answer
c) Acetylcholine

The rapid recovery of the neuron to its resting state after an action potential is known as:
a) Repolarization
b) Hyperpolarization
c) Depolarization
d) Resting phase

Answer
a) Repolarization

Neurotransmitter release is triggered by:
a) Increased potassium concentration
b) Decreased sodium concentration
c) Increased calcium concentration
d) Decreased calcium concentration

Answer
c) Increased calcium concentration

Which ion channel opens in response to an action potential at the presynaptic terminal?
a) Sodium
b) Potassium
c) Calcium
d) Chloride

Answer
c) Calcium

The neurotransmitter that primarily promotes excitatory responses in the central nervous system is:
a) GABA
b) Glutamate
c) Dopamine
d) Acetylcholine

Answer
b) Glutamate

In a synapse, the signal is terminated by:
a) Direct ion flow
b) Reuptake or degradation of neurotransmitters
c) Continued neurotransmitter release
d) Increased calcium concentration

Answer
b) Reuptake or degradation of neurotransmitters

The action potential is propagated along the axon by:
a) Neurotransmitter diffusion
b) Receptor activation
c) Ion channel opening and closing
d) Synaptic cleft transport

Answer
c) Ion channel opening and closing

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

Answer
c) Norepinephrine

If you are interested to enhance your knowledge regarding PhysicsChemistryComputer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.

Was this article helpful?
YesNo
See Also  Ionization Energy MDCAT MCQs with Answers
Facebook
Twitter
LinkedIn
WhatsApp
Pinterest
Telegram
Picture of YFP

YFP

YFP empower the youth with the ability to nurture their communication and leadership skills at a common national platform resulting in greater self-confidence and personal growth.

Leave a Reply

Your email address will not be published. Required fields are marked *