When curare, a neuromuscular poison, is dropped onto an isolated muscle-nerve preparation in a laboratory, the muscle does not contract when the nerve is stimulated, even though neurotransmitter is released from the nerve cell. Why does this happen? How might this action of curare be lethal to an individual who has been poisoned?

Q: b) scorpion, he felt numbness in his fingers due to the neurotoxin produced by the scorpion which is…

A: Scorpion Venom would affect the duration and amplitude of an action potential.

Q: You discover a mutant mouse whose skeletal muscles do not work properly.  You remove a piece of…

A: Acetylcholinesterase or acetylhydrolase is a cholinesterase enzyme primarily found at neuromuscular…

Q: So named beacause it acts under conscious control?

A: Conscious control means which is under the will or the control of the individual.

Q: "Motor neurons trigger action potentials in muscle cell membranes that open voltage-sensitive Ca2+…

A: Introduction: The contraction of the muscle is significantly influenced by calcium ions. When…

Q: Strychnine blocks receptor sites for inhibitory neurotransmitter substances in the CNS. Explain how…

A: Tetanus can be described as an infection that affects the nervous system and causes painful muscle…

Q: subtractive technique that uses nerve stimulation at two points and subtracting the difference…

A: Nerve impulse  conduction is a complex phenomena and it starts at the point of stimulation which is…

Q: 147 An investigator is examining the effects of various manipulations on the electrical activity in…

A: Acetylcholine, the predominant excitatory neurotransmitter in mammalian gut smooth muscle cells1, is…

Q: In experiment，how would you approach determining the potency of an agonist to the D2 receptor？

A: Dopamine is a neurotransmitter, a chemical messenger that plays a role in a variety of physiological…

Q: In the knee jerk, contraction of quadriceps is accompanied by relaxation of the opposing flexor…

A: A reflex action is an automatic and almost instantaneous reaction in response to a trigger. When an…

Q: hemidiaphragm skeletal muscle preparations. Describe the process of synaptic transmission at the…

A: A neuromuscular junction or NMJ is a specific type of synapse formed between a motor neuron and the…

Q: Correct the following false statement: "Any cell that has the acetylcholine receptor will have the…

A: The given statement is FALSE. Acetylcholine is a neurotransmitter. There are two major classes of…

Q: Which of the following structures has activity like acetylcholine?

A: Acetylcholine is acetylcholine which is an ester of acetic acid and choline. Acetylcholine is a…

Q: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: Certain bacteria, such as those that cause botulism or tetanus, produce toxins that interfere with…

A: Neuromuscular transmission (NMT) is a process that permits the central nervous system to control the…

Q: Explain in detail Muscarinic receptors in regards to the hisamine agonist.  How do they cause…

A: Muscarinic receptors These acetylcholine receptors are found in the cell membranes of certain…

Q: Spastic paralysis (resulting from the failure of muscles to relax), induced by the neurotoxin…

A: Neurotransmitters are referred to as the body's chemical messengers. They are the molecules used by…

Q: Multi-cell recordings from the human motor cortex can be used to guide a robotic arm. Discuss BCI…

A: The paralysed woman controls her arms mentally. Need to discuss how she controls and what…

Q: Myasthenia gravis is a disease that leads to a marked decrease in the number of acetylcholine (Ach)…

A: Given:- Each quantum of Ach opens only 200 Ach receptor-channels instead of the normal 2000.- Each…

Q: Your unfortunate friend Greta has a condition where her Ca2+-ATPase works too fast. She comes to…

A: Calcium ions (Ca2+) play a crucial role in muscle contraction. They are stored in the sarcoplasmic…

Q: Explain the structure of NMJ and name the steps of muscle stimulation in orde

A: Neuromuscular junction a point between the axon and the muscle fiber. Skeletal muscle contraction is…

Q: Muscle contraction is not the only process controlled in temperature-regulating reflexes. True or…

A: Muscle contraction is considered as the process, in which tension develops in the site present in…

Q: Describe in details the biochemical and mechanochemical series of events that enables motor neurons…

A: Muscle contraction means activation of tension-generating sites within our muscle cells and the…

Q: What does rhe binding of ACh to nicotinic receptors of skeletal muscle cells directly cause?…

A: Muscle contraction is the activation of tension-generating sites within muscle fibers. In…

Q: Consider three alpha-motor neurons of different sizes: small, medium and large. All three neurons…

A: Introduction Neurons are the basic building blocks of the nervous system, which is responsible for…

Q: Sarcolemma is the plasma membrane of the muscle fiber. Myosatellite cells, remain closely associated…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: For this question you may use either a neuron or a skeletal muscle fiber (but not both) to answer.…

A: Nerve conduction is a general term for electrical signals carried by nerve cells. A gap called a…

Q: Which of the following statements regarding the motor end plate in the somatic motor division of the…

A: The preganglionic nerve fibres synapse with the post synaptic membrane of the muscle sarcomere at…

Q: The following events happens in neuromuscular junction, putthese events in the correct temporal…

A: In skeletal muscles, cells' contraction occurs after the release of calcium ions by the neural…

Q: Acetylcholine molecules are actively transported from the axon to their receptors on the muscle…

A: The neuromuscular junctions are also referred to as motor end-plates. These are defined as the…

Q: re these True or False? Receptors on the post-synaptic cell membrane that bind the acetylcholine…

A: When two molecules of acetylcholine bind a nicotinic Acetylcholine receptor, a conformational change…

Q: A True OUTSIDE CELL This cell is at rest. False INSIDE CELL E

A: Neurons have the capability of generating and transmitting nerve impulses. The transportation of…

Q: Neurotransmitters, the chemicals used in signaling across synapses, can be either re-absorbed by the…

A: Neurotransmitters can serve as chemical messengers for ion channels, neurotransmitter mainly causes…

Q: Based on what you know about the neuromuscular junction and muscle contraction, describe very…

A: The neuromuscular junction is The portion at which the neuron axon terminal meets the skeletal…

Q: Vitamins B1, B6 and B12 are so-called "Neurotropic" vitamins. They may response to "Wallerian…

A: Nervous system is involved in coordinating and controling the activities in animals. It play very…

Q: John Hughes and Hans Kosterlitz identified the endorphin receptor in frogs, and concluded that…

A: Chemicals known as "neurochemicals" have a role in how the brain as well as the nervous system's…

Q: Most immediate physiological adjustments to exercise occur prior to any change in tissue metabolic…

A: Exercise increases the heart rate, stroke volume and cardiac output. These are accompanied by…

Q: Myasthenia gravis is a disease that leads to a marked decrease in the number of acetylcholine (Ach)…

A: Given that only 200 Ach receptor-channels are opened by each quantum of Ach, and each open channel…

Q: If a patient was bitten by a poisonous spider (black widow) and the effects of its venom occurred at…

A: The neurons are the smallest units of the nervous system. they are the nerve cells that are involved…

Substance Abuse

Substance abuse refers to the use of illegal drugs in excessive quantities, as well as the misuse of legal substances such as prescription or over-the-counter pharmaceuticals or alcohol for purposes other than those intended. Drug addiction, also known as substance use disorder, is a disease that affects the brain and behavior of a person. It leads to a failure to control the use of any drug or prescription, legal or illegal.