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

Blood salvage and bloodless open-heart surgery, Blood Salvage and Bloodless...

Blood Salvage and Bloodless Open-heart Surgery: At the time of cardio pulmonary bypass, cardiomony suckers suck blood from the chambers or the heart and pericardium back into the

How drug intolerance in tuberculosis, Drug Intolerance For patients wh...

Drug Intolerance For patients who cannot tolerate rifampin, alternative regimens include 9-12 months of isoniazid, ethambutol and pyrazinamide, with or without a fluoroquinolo

Discuss in short about soil, Discuss in short about soil " The collecti...

Discuss in short about soil " The collection of  natural bodies in the Earth's surface, in places modified or even made by man of Earthy materials, containing living matter  an

Importance of pituitary gland, Importance of pituitary gland Pitutar...

Importance of pituitary gland Pitutary gland is very small and it is about the size of a large pea seed. It is very important as it controls the functions of all the othe

Agro industrial-factors affecting vitamin utilization, Factors affecting vi...

Factors affecting vitamin utilization Raw soybean contains enzyme lipoxygenase which can be destroyed by heating for 5 min with steam at atmospheric pressure. Lipoxygenase cata

Respiration, what is the organ of respiration in snaks

what is the organ of respiration in snaks

Basic structural pattern of limbs, Basic structural pattern of limbs ...

Basic structural pattern of limbs The common structural pattern of tetrapod limbs is extremely clear expressed in their skeletal components and in the manner they are organiz

Define primary and somatic sensory area, Q. Define Primary and Somatic Sens...

Q. Define Primary and Somatic Sensory Area? Primary Sensory Area - Located in postcentral gyrus in parietal lobes (just posterior to central sulcus).  Neurons here receive info

Explain the integrity of cells, When lipid is added to a solution of a dete...

When lipid is added to a solution of a detergent in water, the detergent breaks up large globules of the lipid into much smaller globules. What effect do you think a detergent woul

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