Threshold for an action potential in neuron a, Biology

Assignment Help:

Neuron A is a healthy neuron with all the usual ion channels.  When at rest with a membrane voltage of R millivolts, neuron A produces no action potentials. 

The voltage threshold for an action potential in neuron A is T millivolts.  T is greater than R; T is less than zero.  In addition, neuron A's membrane includes the membrane-spanning molecule Z with an ion channel that opens when neurotransmitter Y binds to the Y receptor site on the extracellular surface of Z.  The Nernst equilibrium potential for Z's ion channel is E millivolts.  Neuron B synapses on neuron A; neuron B's neurotransmitter is neurotransmitter Y.  Which of the following statements are true when neuron A is initially at rest and neuron B releases neurotransmitter Y?

A. If the value of E is zero and if both sodium ions and potassium ions pass through open Z channels, then Y's binding to its receptor site on Z in neuron A produces an increase in the amount of intracellular potassium ions in neuron A.

B. If the value of E is greater than R and if the value of E is less than T, and if chloride is the only ion that passes through open Z channels, then Y's binding to its receptor site on Z in neuron A produces a decrease in the amount of intracellular chloride ions in neuron A.

C. If the value of E is equal to R, and if chloride is the only ion that passes through open Z channels, then Y's binding to its receptor site on Z in neuron A produces an increase in the chloride conductance of the plasma membrane of neuron A.

 


Related Discussions:- Threshold for an action potential in neuron a

Describe about transposition with large ventricular septal, Describe about...

Describe about Transposition of great arteries with large ventricular septal defect ? Transposition of great arteries with large ventricular septal defect: Usually the intercir

Pathophysiology, The clinical  manifestations of IE result from the ...

The clinical  manifestations of IE result from the local destructive effects of intracardiac infection; the embolization of bland or septic fragments of vegetations to

How to use subcellular fractionation and a western blot, A virus capsid con...

A virus capsid containing vimentin, your protein of interest, gets into the cell nucleus and is broken down with the DNA being released. It is unknown whether the capsids themselve

Nervous system - meninges, Meninges (Singular-Meninx) - Ceverings of...

Meninges (Singular-Meninx) - Ceverings of brain. By infection in meninges meningitis or brain fever is caused. These menings are internally lined by squamous epitheliu

How to care of the ventilated patient, How to Care of the Ventilated Patien...

How to Care of the Ventilated Patient Constant focused attention is required for the patient on mechanical ventilatory support. A good understanding of the problems that can a

Advantages and disadvantages of solar energy, Advantage of solar energy: ...

Advantage of solar energy: 1.         It is renewable: it produce comes from sun, so it is plentiful and will always be there   as long we need it . 2.         Solar

Cleft palate, Cleft Palate: Well you have now learnt about the cleft l...

Cleft Palate: Well you have now learnt about the cleft lip and now let us dicuss and understand what is cleft palate. Cleft palate (CP) is midline fissure of  the palate that

What are the illustrations of the criminal law, What are the illustrations ...

What are the illustrations of the criminal law? Illustrations of crimes' law: Illustrations of crimes are theft, reckless or murder behaviour. The major aim of illegal

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