State about membrane-spanning molecule, Biology

Assignment Help:

State about membrane-spanning molecule

Neuron A is a healthy neuron with all the usual ion channels and with all the usual intracellular and extracellular distributions of ion concentrations.  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 is 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 R is less than E, 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 no change in the chloride conductance of the plasma membrane of neuron A.

 


Related Discussions:- State about membrane-spanning molecule

What are the differences between mitosis and meiosis, Concerning their fina...

Concerning their final products (daughter cells and their ploidies) what are the differences between mitosis and meiosis? In mitosis one cell, for example, with 2n chromosomes,

What do you mean by osseous cavity, Q. What is the osseous cavity where the...

Q. What is the osseous cavity where the pituitary gland is located? The hypophysis or pituitary gland is located in the sella turcica of the sphenoid bone (one of the bones in

Define ascending type of paper chromatography, Define ascending type of pap...

Define ascending type of paper chromatography? The ascending type consists in dipping the lower end of the paper containing the sample spots into the solvent so that it is abov

Describe the external features of the heart, Question 1 Describe the exter...

Question 1 Describe the external features of the heart. Add a note on circulation of blood within the heart Question 2 Discuss the major joints of thorax and pelvis Quest

Define the principle behind cyanmethemoglobin method, Define the Principle ...

Define the Principle behind Cyanmethemoglobin Method? The principle behind the cyanmethemoglobin method is as follow: Principle The haemoglobin is treated with a reagent con

Explain interactions of macrominerals with other nutrients, Explain Interac...

Explain Interactions of Macrominerals With Other Nutrients? Various nutrients interact with minerals thereby affecting their bioavailability. These interactions occur at differ

How does the federal government regulate plant-incorporated, How does the f...

How does the federal government regulate plant-incorporated protectants and ensure their safe use in foods? EPA regulates the manufacture, sale and use of pesticides, containin

How execute the two complementary nucleotide chains, Q. How execute the two...

Q. How execute the two complementary nucleotide chains of the DNA facilitate the replication process of the molecule? The fact that DNA molecule is made of two polynucleotide c

Reproductive cycles, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Difference between open system and closed system, DIFFERENCE BETWEEN OPEN S...

DIFFERENCE BETWEEN OPEN SYSTEM AND CLOSED SYSTEM - S .No. C h arac t er O p en system C losed system

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