A postsynaptic neuron has three presynaptic inputs - from neurons X, Y, and Z. When X and Y are stimulated simultaneously and repeatedly, the postsynaptic neuron reaches threshold and undergoes an action potential. When X and Z

Q: Each of the following contributes to the unidirectional propagation of nerve signals EXCEPT_ A)…

A: If too many mistake are introduced in the chromosomes during DNA replication, the cell will not…

Q: Explain in a presynaptic neuron triggers the membrane depolarization in a postsynaptic neuron and…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: During excitatory synaptic transmission, the electrical signal carried along the axon of a…

A: The point of electric nerve impulse transmission between two nerve cells (neurons), or between a…

Q: In the central nervous system there may be many synaptic inputs on a postsynaptic neurons.  How does…

A: A single axon will have multiple branches, permitting it to create synapses on varied postsynaptic…

Q: Increasing the amount of action potentials that arrive at the presynaptic terminal will: (Can pick…

A: An action potential is generated when there are a rapid rise and fall of membrane potential across…

Q: Postsynaptic receptors include all the following types, except :-a- G-protein coupled receptorsb-…

A: Metabotropic receptors are also referred to as G protein linked receptors or G protein coupled…

Q: You have isolated a neurotoxin from a newly discovered snake species. When you administer the toxin…

A: The presynaptic and post synaptic neuron are the two interconnected neuron which can communicate…

Q: Action potentials are changes in membrane potential that are localized to a small area of the plasma…

A: Answer :  Movements potential travels alongside a neuronal axon: The action capability is pushed…

Q: Compare (consider both similarities and differences), contrast, and give the physiological…

A: Comparison between electrical and chemical synapses are: Electrical synapses are direct connections…

Q: A new drug opens calcium ion channels in the membrane of the postsynaptic neuron. Would this produce…

A: There are many different types of cells in the body which form various organs and organ systems. For…

Q: When ionotropic receptors allow the influx of ions, the postsynaptic cell depolarizes. When they…

A: The neurons are the cells of nervous system that has the conducting capability. The nerve impulse…

Q: Cocaine blocks the removal of dopamine from the synapse, leading to a rapid rise of dopamine in the…

A: A synapse is a gap between two neurons through which electrical impulses pass. The presynapse is the…

Q: Why does neuronal function require the voltage-gated K+ channels to open more slowly than the…

A: Voltage-gated channels are specialized proteins that are essential for the generation and…

Q: A channels opens a postsynaptic membrane that causes a negative ion to enter the cell. What type of…

A: Graded potentials are the short lived changes occurs according to the charge in the membrane. They…

Q: In the resting state, before or long after an action potential occurs, the activation gates of…

A: Voltage-gated Na+ channels have three main conformational states: closed, open and inactivated.…

Q: Spastic paralysis (resulting from the failure of muscles to relax), induced by the neurotoxin…

A: Neurotransmitters are referred to as the body's chemical messengers. They are the molecules used by…

Q: a)Explain how the presynaptic cell "knows" when to release its neurotransmitter into the synaptic…

A: Neurotransmitters are often referred to as the body’s chemical messengers. They are the molecules…

Q: Inhibitory postsynaptic potentials cause what type of change at the post-synaptic membrane?

A: Excitatory  Neuron excites their target post synaptic neurones  or target cells causing it to…

Q: What is a typical value for an inhibitory post synaptic potential?  Why is it inhibitory?

A: An inhibitory post synaptic potential is a kind of synaptic potential that makes a postsynaptic…

Q: Since at any moment a neuron is likely to have thousands of neurons releasing neurotransmitters at…

A: Neurons are communication messengers. They utilize electrical impulses and chemical signals to…

Q: I have stimulated a neuron with dopamine for a second followed by treating it with cocaine and…

A: Homeostasis of calcium ions is essential for survival and neuronal function. In the nerve cells,…

Q: more channels may lead to an even larger depolarization, up to a point. Then the depolarization…

A: Normally the Nerve cell remains in resting stage untill it gets stimulus .Nerve cell regulates…

Q: After an action potential has been initiated, there are two processes that prevent the membrane from…

A: The generation of action potential is very much important characteristics in nerve cells that is…

Q: When they are not being stimulated, neurons have an electrical charge across their membranes called…

A: The control and coordination of the body in humans occur by two systems: the nervous system and the…

Q: Describe how neurotransmitter binding to receptors on apostsynaptic cell causes inhibition or…

A: Neurotransmitters are chemicals responsible for the transmission of a signal or an impulse via a…

Q: From an action potential traveling towards the presynaptic terminal to the potential change in the…

A: Ionotropic synaptic transmission This transmission involves the ionotropic receptors which are also…

Q: ATP is used to power the creation of a neuron's resting potential. True False

A: Resting potential of the neuron is -70 mV.

Q: Neurotransmitter binding to the receptor is transient andreversible. True or false?

A: In human physiology, neurotransmitters are defined as the chemical compound or substances of the…

Q: During the _____ phase of an action potential, the membrane potential is more positive than the…

A: Phases of generation of action potential from resting membrane potential  Depolarisation…

Q: What is a typical value for an inhibitory post synaptic potential? Why is i inhibitory?

A: An inhibitory postsynaptic potential is a kind of synaptic potential that makes a postsynaptic…

Q: Neuroactive drugs, such as the antidepressant fluoxetine, function by affecting the metabolism of…

A: Fluoxetine is a selective serotonin reuptake inhibitor (SSRI) antidepressant.

Q: An action potential has reached the axon terminal of a presynaptic cell. As a result of the action…

A: An action potential can be defined as a short-term change that can be observed in electrical…

Q: You have a neural system with three neurons; two presynaptic (PS1 and PS2) and one postsynaptic…

A: Neurons are the fundamental, structural, and units of both the central and peripheral nervous…

Q: "Hebb's Rule" says, in effect, that   a neuron that is repeatedly activated will have an…

A: Donald Hebb suggested the Hebb's law postulate in 1949 [1]. It's a learning rule that explains how…

Q: Define inhibitory postsynaptic potential (IPSP)

A: The neurotransmitter diffuses across the synapse, combines with the specific receptor sites on the…

Q: In chemical synapses, neurons communicate with other neurons or skeletal muscles via…

A: Following are the steps in the neurotransmission in chemical synapses :- 1) synthesis of…