Skeletal Muscle and Cholinergic Synapse Quiz

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What type of receptor is the Nicotinic AChR?

Heterotrimeric

G-protein coupled

Ionotropic (correct)

Metabotropic

Which subunits surround the pore of the Nicotinic AChR?

α, β, γ, δ, θ

α, β, δ, ε, ζ

α, β, γ, ε, η

α, β, γ, δ, ε (correct)

What type of receptor is the Muscarinic AChR?

Heterotrimeric

Metabotropic (correct)

Ligand-gated

Ionotropic

What is the function of an agonist?

To bind to a receptor and initiate a signaling event Signup and view all the answers

Which substance acts as an antagonist for Nicotinic AChR?

Curare Signup and view all the answers

What is the effect of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

Treatment of bradycardia (slow heart rate) Signup and view all the answers

What is the exception in the sympathetic nervous system (SNS) mentioned in the text?

Adrenal medulla Signup and view all the answers

What is responsible for the widespread effects of epinephrine and norepinephrine mentioned in the text?

Chromaffin cells Signup and view all the answers

Which functional unit of the nervous system is based on neurons?

Reflex arc Signup and view all the answers

Which division of the nervous system is specialized for fast transmission and always excitatory?

Somatic motor neurons Signup and view all the answers

Which part of the nervous system relies completely on circulating catecholamines?

Sympathetic nervous system Signup and view all the answers

Where do preganglionic neurons synapse in the exceptional case of the sympathetic nervous system?

Adrenal medulla Signup and view all the answers

What type of cells secrete epinephrine and norepinephrine into circulation?

Chromaffin cells Signup and view all the answers

What is the structural unit of the nervous system?

Neurons Signup and view all the answers

What is the function of Nicotinic AChR?

Rapid ionotropic receptor Signup and view all the answers

Which subunits surround the pore of Nicotinic AChR?

α, β, γ, δ, ε Signup and view all the answers

What characterizes the Muscarinic AChR?

Metabotropic receptor Signup and view all the answers

What is the role of the hypothalamus in the autonomic nervous system?

Initiates fight-or-flight response and regulates body temperature, food intake, and water balance Signup and view all the answers

Which centers are involved in the regulation of breathing, heart rate, and blood pressure?

Medulla oblongata Signup and view all the answers

What are the criteria for a substance to be classified as a neurotransmitter?

It is synthesized in neurons and released at the presynaptic membrane following depolarization Signup and view all the answers

What is the role of an agonist?

It binds to a receptor and initiates a signaling event Signup and view all the answers

Which substance acts as an antagonist for Muscarinic AChR?

Atropine Signup and view all the answers

What are the effects of curare, an antagonist for Nicotinic AChR?

Suppression of breathing Signup and view all the answers

What is the function of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

Treatment of bradycardia (slow heart rate) Signup and view all the answers

What is the primary function of an antagonist?

Interfering with the binding of the natural ligand Signup and view all the answers

Which substance acts as an agonist for Muscarinic AChR, causing bronchoconstriction and bradycardia?

Muscarine Signup and view all the answers

What is the effect of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

Bronchiole dilation Signup and view all the answers

What role does the hypothalamus play in the autonomic nervous system?

Initiates fight-or-flight response and regulates body temperature, food intake, and water balance Signup and view all the answers

Which centers are involved in the regulation of breathing, heart rate, and blood pressure?

Medulla oblongata Signup and view all the answers

What are the criteria for a substance to be classified as a neurotransmitter?

Synthesized in neurons, released at presynaptic membrane following depolarization, and recognized by postsynaptic receptors Signup and view all the answers

What is the functional unit of the nervous system, based on neurons?

Reflex arc Signup and view all the answers

Which division of the nervous system relies completely on circulating catecholamines?

Sympathetic nervous system Signup and view all the answers

What characterizes the role of chromaffin cells in the exceptional case of the sympathetic nervous system?

They secrete epinephrine and norepinephrine into circulation Signup and view all the answers

What is the key system for the neural control of bodily function?

Autonomic nervous system (ANS) Signup and view all the answers

Skeletal Muscle and Cholinergic Synapse Quiz

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Questions and Answers

What type of receptor is the Nicotinic AChR?

Which subunits surround the pore of the Nicotinic AChR?

What type of receptor is the Muscarinic AChR?

What is the function of an agonist?

Which substance acts as an antagonist for Nicotinic AChR?

What is the effect of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

What is the exception in the sympathetic nervous system (SNS) mentioned in the text?

What is responsible for the widespread effects of epinephrine and norepinephrine mentioned in the text?

Which functional unit of the nervous system is based on neurons?

Which division of the nervous system is specialized for fast transmission and always excitatory?

Which part of the nervous system relies completely on circulating catecholamines?

Where do preganglionic neurons synapse in the exceptional case of the sympathetic nervous system?

What type of cells secrete epinephrine and norepinephrine into circulation?

What is the structural unit of the nervous system?

What is the function of Nicotinic AChR?

Which subunits surround the pore of Nicotinic AChR?

What characterizes the Muscarinic AChR?

What is the role of the hypothalamus in the autonomic nervous system?

Which centers are involved in the regulation of breathing, heart rate, and blood pressure?

What are the criteria for a substance to be classified as a neurotransmitter?

What is the role of an agonist?

Which substance acts as an antagonist for Muscarinic AChR?

What are the effects of curare, an antagonist for Nicotinic AChR?

What is the function of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

What is the primary function of an antagonist?

Which substance acts as an agonist for Muscarinic AChR, causing bronchoconstriction and bradycardia?

What is the effect of isoproterenol, an agonist for Adrenergic Receptors (SNS)?

What role does the hypothalamus play in the autonomic nervous system?

Which centers are involved in the regulation of breathing, heart rate, and blood pressure?

What are the criteria for a substance to be classified as a neurotransmitter?

What is the functional unit of the nervous system, based on neurons?

Which division of the nervous system relies completely on circulating catecholamines?

What characterizes the role of chromaffin cells in the exceptional case of the sympathetic nervous system?

What is the key system for the neural control of bodily function?

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