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

Inter phase - cell cycle, The period of life cycle of cell (cell cycle) bet...

The period of life cycle of cell (cell cycle) between two consecutive divisions is termed as the Interphase or misleading called resting phase. It is a period

Explain disease dengue, Dengue Dengue fever is a viral disease transmi...

Dengue Dengue fever is a viral disease transmitted by mosquito bites that occurs worldwide in tropical and subtropical areas. Major epidemics have occurred in recent years in

Define effect of nutrition on the immune system, Define Effect of Nutrition...

Define Effect of Nutrition on the Immune System? Nutrition has a strong influence on the immune system of the elderly. Ageing induces dysregulation of the immune system, mainly

Allow the natural capital from one country to be utilized, In today's globa...

In today's global economy, goods flow from one country to another like never before, allowing the natural capital from one country to be utilized in many other countries. Some have

Genetics, What is the term for the pattern of base pairing between one DNA ...

What is the term for the pattern of base pairing between one DNA strand and its partner in a duplex?

What is biodiverse ecosystems, What are some economic applications that can...

What are some economic applications that can be generated by very biodiverse ecosystems? Very biodiverse areas show enormous economic potential. They can be a source of raw mat

Classification of different agro-industrial by-products, Classification of ...

Classification of Different Agro-Industrial By-Products The agro-industrial by-products can be grouped according to the content of nutrients namely: (i) Energy rich supplem

Diseases of neonates - calf scour, D i se a s e s of Neonates Ca...

D i se a s e s of Neonates Calf scour It is also known as dietary diarrhoea and is characterized by foul smelling liquid faeces, and weight loss. E t iolo

Explain the treatment options after endodontic failure, Explain the Treatme...

Explain the Treatment Options after Endodontic Failure a) Non-surgical retreatment "re-endo", b) Root-end surgery "if there is a will detected mistake as separated instrumen

Monounsaturated fatty acids required for dyslipidemia, Q. Monounsaturated f...

Q. Monounsaturated fatty acids required for dyslipidemia? Polyunsaturated fatty acids also have a cholesterol decreasing effect. Omega 3 fatty acids are excellent for the heart

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