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

smog - london smog and photochemical smog, The word 'smog' consists of two...

The word 'smog' consists of two words 'smoke' and 'fog'. This name was given because Fog in the atmosphere Condense on the carbon particles of smoke to form smog. There are two typ

Explain about central nervous system, Central Nervous System (CNS) Cove...

Central Nervous System (CNS) Covering of the brain and spinal cord is called Meanings (membranes which cover and protect brain and spinal cord are called meanings) There is flu

What are the coverings of the body, Q. Besides the skin what are the other ...

Q. Besides the skin what are the other coverings of the body? Besides the skin there are other covering tissues made of epithelium over other tissue layers. They are the tissue

Determine some methods of blood glucose estimation, Determine some Methods ...

Determine some Methods of Blood Glucose Estimation? The various types of methods for estimation of blood glucose can be grouped under two groups: a) Chemical methods b) E

How can amine groups be classified, How can amine groups be classified? ...

How can amine groups be classified? Amines can be classify into primary amines, those to which one -R (variable radical) is attached to a -NH2, secondary amines, those where on

Infective endocarditis, A) Definitive Infective Endocarditis 1) Patho...

A) Definitive Infective Endocarditis 1) Pathological Criteria • Micro organism: demonstrated by culture or histology in a vegetation; or in a vegetation that has embolize

Disorder of skeleton and joints, DISORDER OF SKELETON AND JOINTS - 1 ...

DISORDER OF SKELETON AND JOINTS - 1 .      Sprain - It involves a stretching or tearing of tendons or ligaments. 2.      Arthritis - It is infalmation of joints.

Define pacinian corpuscules, Q. Define Pacinian corpuscules? Pacinian ...

Q. Define Pacinian corpuscules? Pacinian corpuscules are an example of sensory receptors scattered deep in the subcutaneous tissue underlying skin or in viscera.  These mech

Determine the intracellular concentration of trva, Determine the intracellu...

Determine the intracellular concentration of TRVA Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectly c

Traits, What happens to traits in a species that is evolving over time?

What happens to traits in a species that is evolving over time?

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