Is neuron a synapses onto neuron b, Biology

Assignment Help:

Is Neuron A synapses onto Neuron B

Consider Neuron B in the frog central nervous system whose plasma membrane has a newly discovered ligand-gated ionotropic receptor, named the LGD receptor.  The channel in the same molecular complex as the LGD receptor is termed the LGD receptor channel and is a monovalent cation channel that, when open, is permeable to both sodium and potassium.  The Nernst equilibrium potential for sodium in Neuron B is +50 mV, and the Nernst equilibrium potential for potassium in Neuron B is -100 mV.  The threshold for an action potential in Neuron B is -55 mV and the resting potential for Neuron B is -75 mV.  LGD is an agonist for the ligand-gated ionotropic receptor.  When LGD binds to its binding site, there is an increase in conductance of both sodium and potassium in the LGD receptor channel.  Neuron A synapses onto Neuron B.  Neuron A's transmitter is LGD.

  A.  Consider the situation that when the LGD receptor channel is open in Neuron B, its potassium conductance equals three times its sodium conductance.  For this situation, in response to an action potential in Neuron A, then there will be a voltage increase and an excitatory postsynaptic potential in Neuron B.

  B.  Consider the situation that when the LGD receptor channel is open in Neuron B, its potassium conductance equals four times its sodium conductance.  For this situation, in response to an action potential in Neuron A, then there will be no change in voltage in Neuron B.

  C.  Consider the situation that when the LGD receptor channel is open in Neuron B, its potassium conductance equals nine times its sodium conductance.  For this situation, in response to an action potential in Neuron A, then there will be a voltage decrease and an inhibitory postsynaptic potential in Neuron B.

 


Related Discussions:- Is neuron a synapses onto neuron b

Subphylum trilobitomorpha, Subphylum Trilobitomorpha Subphylum Trilobi...

Subphylum Trilobitomorpha Subphylum Trilobitomorpha involves the trilobites. All species are extinct and the fossils point out that they were all marine forms belonging to Pal

Phylum arthropoda - classification of multicellular animals, Phylum Arthrop...

Phylum Arthropoda - Classification of Multicellular Animals Earlier you known how the coelom evolved and the body of the coelomates got segmented leading to evolution of segme

Dinoflagellates, Dinoflagellates are single-celled to colonial protistans ...

Dinoflagellates are single-celled to colonial protistans characterized by the two flagella, one girdling cell and the other trailing the cell. Some of the dinoflagellates exist in

How computed tomography helps the doctors, Explain briefly how computed tom...

Explain briefly how computed tomography (CT) helps the doctors in pinpointing the defects in the patient's body

Definition of osmosis, Definition of osmosis A) The best explanation of...

Definition of osmosis A) The best explanation of osmosis is 'The movement of water from a dilute solution to a    concentrated solution across a partially permeable membrane'.

What is meant by the expression infant mortality, What is meant by the expr...

What is meant by the expression 'infant mortality'? Infant mortality refers to the number of babies in a population who die at the age of 1 year or less. It is usually express

Define deuterostomes in animal kingdom, Define Deuterostomes in animal king...

Define Deuterostomes in animal kingdom? Coelomate animals are thought to have separated into two divergent lines of evolution in terms of the way embryos develop. In the embryo

Explain phylum chlorophyta, Phylum Chlorophyta (green algae) 1) The c...

Phylum Chlorophyta (green algae) 1) The chlorophyll is the main photosynthetic pigment. 2) There is little or no cell differention in thallus. Thallus is usually filamento

Eggs of frog, EGG S OF FROG This egg is round & its diameter is of 1-2...

EGG S OF FROG This egg is round & its diameter is of 1-2 mm. It is mesolecithal & has distinct animal pole & vegital pole. The nucleus is found in the centre of the anim

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd