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Neurotransmitters and Receptors in Chemical Synapses

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Questions and Answers

What is required for a neurotransmitter to pass to the postsynaptic membrane?

A minimum of three different receptors
At least two identical receptors (correct)
All receptors in the postsynaptic membrane
Only one specific receptor

What is the function of the enzyme Ach-esterase in the postsynaptic membrane?

To produce more Ach
To activate Ach receptors
To rapidly destroy Ach (correct)
To prolong the lifetime of Ach

What is the effect of anticholinesterase drugs on Ach?

They accelerate the destruction of Ach
They increase the production of Ach
They prolong the lifetime of Ach (correct)
They have no effect on Ach

Why is it essential for each neurotransmitter to have a specific receptor?

To prevent the wrong neurotransmitter from binding to a receptor (D) Signup and view all the answers

What is the result of Ach binding to its receptor in the postsynaptic membrane?

Ach-esterase is activated (D) Signup and view all the answers

What is the characteristic of Myasthenia Gravis as an autoimmune disease?

Type 2 hypersensitivity (D) Signup and view all the answers

What is the primary effect of the pathology of the receptor in the postsynaptic membrane in Myasthenia Gravis?

Normal electrical charge is not established on the postsynaptic membrane (B) Signup and view all the answers

Which muscle groups are typically affected in Myasthenia Gravis?

Skeletal and extraocular muscle (C) Signup and view all the answers

What is the mechanism of action of the Antibodies in Myasthenia Gravis?

They bind to the nicotinic receptor and prevent it from binding to Ach (A) Signup and view all the answers

What is the emergency complication of Myasthenia Gravis?

Myasthenia crisis (C) Signup and view all the answers

What is the outcome of long-term use of anticholinesterase drugs in Myasthenia Gravis patients?

Toxicity and respiratory failure (C) Signup and view all the answers

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