Define the postsynaptic 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 less than R and if potassium 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 membrane voltage of neuron A, an increase in the amount of intracellular potassium ions in neuron A, and an inhibitory postsynaptic potential in neuron A

B. 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 the membrane voltage of neuron A, an increase in the amount of intracellular potassium ions in neuron A, and an excitatory postsynaptic potential in neuron A.

C. If the value of E is greater than R and 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 an increase the membrane voltage of neuron A, a decrease in the amount of intracellular chloride ions in neuron A, and an inhibitory postsynaptic potential in neuron A.

 


Related Discussions:- Define the postsynaptic potential in neuron a

Define nitrogen requirements in pregnancy and lactation, Define Nitrogen re...

Define Nitrogen requirements in Pregnancy and Lactation? The nitrogen accretion in the pregnant woman (assuming that the foetus weighs 3.3 kg at term), estimated by the Committ

Explain endoskeleton in detail, Explain Endoskeleton in detail. Support...

Explain Endoskeleton in detail. Supporting structures of the skeleton surrounded by the body tissues. As a consequence, there is living tissue on all sides of endoskeletal stru

Define dietary management for burns, Define Dietary Management for Burns? ...

Define Dietary Management for Burns? Nutritional support is a major part of therapy for a patient with burns in view of the large catabolic losses, essential anabolic demands a

Enzyme-controlled reaction, If an enzyme-controlled reaction normally takes...

If an enzyme-controlled reaction normally takes place at 10ºC, in general terms how will the reaction be affected by  (a) a fall in temperature to 2°C , (b) a rise in temperature t

Define characteristics of prebiotics, Define characteristics of prebiotics?...

Define characteristics of prebiotics? Characteristics of prebiotics Are non-digestible dietary/food ingredients Are not hydrolyzed/absorbed in the upper GIT, reach

Concerning their permeability how are membranes classified, Q. Concerning t...

Q. Concerning their permeability how are membranes classified? Membranes can be classified as permeable, impermeable, selectively permeable or semipermeable. An impermeable

How are the antibodies against the rh factor formed, How are the antibodies...

How are the antibodies against the Rh factor formed? Anti-Rh antibodies are made by humoral immune response. When an Rh- individual makes contact with the Rh factor this is rec

Syngamy - protozoan, Syngamy - Protozoan The two gametes may be morpho...

Syngamy - Protozoan The two gametes may be morphologically similar (isogametes) or dissimilar (anisogametes). The gametes also vary in form, they may be flagellated or amoeboi

What are the causes of constipation, Q. What are the Causes of constipation...

Q. What are the Causes of constipation? The most common causes of constipation are poor elimination habits, a lack of fibre in the diet, insufficient fluid intake, lack of exer

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