17 Questions
What is the role of acetylcholinesterase at the neuromuscular junction?
It blocks the action of ACh at receptor sites
What is the consequence of black widow spider venom on the neuromuscular junction?
Explosive release of ACh
What effect does botulism toxin have on the neuromuscular junction?
Blocks release of ACh
How does curare impact the function of acetylcholine at the neuromuscular junction?
Blocks action of ACh at receptor sites
Which disease is characterized by the loss of ACh receptor sites at the end plate?
Myasthenia gravis
What is the cause of Amytrophic Lateral Sclerosis (ALS/Jou-Gehrig’s disease)?
Mitochondrial disfunction
What is the function of organophosphates in relation to AChE?
Prevents activation of AChE
What happens when Ion movements depolarize the motor end plate at the neuromuscular junction?
It produces end-plate potential (EPP)
What effect does Myasthenia gravis have on muscle function?
Causes flaccid paralysis
What is the outcome of exposure to organophosphates?
Prevents activation of AChE
Which part of the autonomic nervous system is responsible for dominating in emergency or stressful situations?
Sympathetic nervous system
In the autonomic nervous system, what type of receptors do cholinergic nicotinic receptors bind to?
Acetylcholine
Which of the following is true about the parasympathetic system?
It has a long postganglionic fiber
What is the primary neurotransmitter used by the postganglionic neuron in the sympathetic nervous system?
Norepinephrine
Which receptor is found exclusively in the sympathetic nervous system and binds to norepinephrine and epinephrine?
Alpha receptor
In which scenario would the Beta 2 receptor be involved?
Flattening of the lens for far vision
What is the function of a muscarinic receptor in the parasympathetic nervous system?
Bind to acetylcholine released by postganglionic neurons
Test your knowledge on the Efferent Division of the Peripheral Nervous System, focusing on the Autonomic Nervous System (ANS) including its two divisions - Sympathetic and Parasympathetic. Explore the structure and function of the ANS and its interaction with the Central Nervous System (CNS).
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