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What is the effect of atropine plus acetylcholine on frog heart?
ACh will decrease heart rate/contractile strength, etc. Atropine is a muscarinic ACh receptor (mAChR) antagonist, so blocks the effects of ACh. Adding both together will result in a weak action of ACh that tails off as all the mAChRs become blocked by Atropine.
What is the effect of curare on eliciting an action potential?
it is an alpha-toxin that binds to acetylcholine binding sites on the postsynaptic cell membrane, which prevents the acetylcholine from acting. Curare blocks synaptic transmission by preventing neural impulses to flow from neuron to neuron. It does allow the action potential to travel in the axon, it just doesn't pass it on to the dendrite.
What drugs increase the action of the nervous system?
acetylcholine
Does scopolamine have a cholinergic response?
Scopolamine is an anticholinergic drug, meaning it blocks the action of acetylcholine at muscarinic receptors in the nervous system. As a result, it does not produce a cholinergic response; instead, it inhibits functions typically mediated by acetylcholine, such as salivation and gastrointestinal motility. It is commonly used to prevent motion sickness and nausea.
Does atropine block only nicotinic receptors?
Atropine does not only block nicotinic receptors but also acetylcholine at muscarinic receptors
While Botulinum toxin blocks the release of acetylcholine the tetanoid toxin actually blocks the release of GABA. How would the effects of tetanoid toxin exposure be different from the results of BT?
The blocking of GABA release will cause convulsions, where as the blocking of acetylcholine will cause paralysis.
When an action potential arrives at the neuromuscular junction the most immediate response?
is the release of acetylcholine from the motor neuron into the synaptic cleft.
What is an autoimmune disorder that involves the action of the neurotransmitter acetylcholine?
myasthenia gravis
What is the neurotransmitter of alpha-motor neuron?
Alpha-Motor neurons release the neurotransmitter acetylcholine at a synapse called the neuromuscular junction. When the acetylcholine binds to acetylcholine receptors on the muscle fiber, an action potential is propagated along the muscle fiber in both directions.
What is the agent that blocks parasympathetic nerve impulses?
Atropine is an agent that blocks parasympathetic nerve impulses by inhibiting the action of acetylcholine at muscarinic receptors. It is commonly used in medical settings to increase heart rate and dilate the pupils.
What breaks down acetylcholine?
Acetylcholine is broken down by the enzyme acetylcholinesterase into acetate and choline. This breakdown process is essential for terminating the action of acetylcholine at the synapse, allowing for proper signaling between nerve cells. Excess acetylcholine breakdown can lead to conditions such as myasthenia gravis.
What is a drug that blocks the release of neurotransmitters?
Botulinum toxin, commonly known as Botox, is a drug that blocks the release of acetylcholine at the neuromuscular junction, preventing muscle contractions. This action can help to reduce muscle spasticity, dystonia, and other conditions related to excessive muscle activity.
