From the following choices, choose the THREE, that would result in prevention of muscle contraction (in other words, which three descriptive changes below would result in flaccid paralysis of a muscle).   exocytosis of acetylcholine is constant, even without action potential   injection of botulinum toxin   calcium cannot be pumped back into the terminal cisternae   acetylcholine receptor remains open to sodium   active sites on actin a permanently exposed   dramatically increase the activity of acetylcholinesterase

Q: In your own words, describe the main events occurring between the arrivalof an action potential at a…

A: The chemical synapse that favors the transmission of the signal from the motor neurons to the muscle…

Q: A mutation in troponin that increased its affinity for its ligand would lead to

A: Troponin protein helps to make muscle in rest Condition with the help of tropomyosin protein

Q: Therefore, a muscle cell at rest is said to be __________________ and has membrane potential.

A: An abrupt, quick, transient, and propagating shift in the resting membrane potential is referred to…

Q: Actin is sometimes called the "thick" filament. It splits ATP and is responsible for the "power…

A: The movements of different body parts are attributed to the systemic contraction and relaxation of…

Q: Neurons supplying smooth muscle secrete histamine display receptors only on the dendrites create…

A: Smooth muscle are cells that do not have striations. These muscles are present in the walls of…

Q: Discuss the similarities and differences by which Ca2+ activity is involved in initiating muscle…

A: "Muscles" perform various functions as movement, which is the fundamental purpose of muscles is to…

Q: Action potential ente from adjacent cell. 1 Ca2+ 2 K* 3 Na* Ca2+ ЕCF ATP NCX ICF 3 Na* RyR Ca2+…

A: The muscle contraction of myocardial cells is activated with the help of specific stimulus that…

Q: Why is it important to remove acetylcholine from its binding to acetylcholine receptors once the…

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

Q: The specialized post-synaptic portion of a neuromuscular junction is called a pick one: motor…

A: Individual motor units, each of which contains a single motor neuron and all the muscle fibers it…

Q: An action potential travels down the 13. Ахon of the motor neuron until it reaches the presynaptic…

A: An action potential can be defined as a rapid increase and decrease in the membrane potential of the…

Q: The flushed appearance of skin is due to the hemoglobin in blood. True False

A: Tissue is a part of structural organization of the body which is formed of various cell . Tissue is…

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: In theory, could a muscle cell get away with having only acetylcholine-gated cation channels, which…

A: Voltage-gated ion channels are a crucial component of generating and propagating action potentials…

Q: * :Muscle troponin protein provides.22 Contraction Elasticity Extensibility None of the above

A: Troponins are a group of proteins that can be found in striated muscle. Its levels are low in the…

Q: The motor unit firing patterns are measured in a human hand muscle using an electromyography (EMG)…

A: The EMG pattern observed as the individual voluntarily attempts to make a low-level force of…

Q: Muscle spindles are the sensory receptors that monitor the length of skeletal muscles. When the…

A: The muscles are involved in movements happening in an organism. These movements can be voluntary or…

Q: Why is it important to remove acetylcholine from its binding to acetylcholine receptor once neural…

A: Acetylcholine : It is an organic chemical which functions in the brain and body of many types of…

Q: The following is an oscilloscope tracing displaying the muscle twitch of an intact, viable frog…

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: Release of calcium from the terminal cisternae Binding of acetylcholine to the acetylcholine…

A: Adenosine triphosphate is a natural compound and hydrotrope that gives energy to drive many cycles…

Q: The motor end plate is extensively folded to allow for greater number of what structure? Terminal…

A: Motor end plates are called Neuromuscular junctions, are specialized chemical synapses formed at the…

Q: Botulism is a disease that was associated to eating out of cans that had been contaminated by a…

A: Introduction: The muscle contraction occurs when a neural signal reaches the neuromuscular junction…

Q: Predict the consequence if presynaptic action potentials in an axonrelease insufficient…

A: Acetylcholine is an organic chemical that functions in the brain and body of many types of animals…

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: Use choices from the following word bank to fill in the blanks 13 - 22: Calcium ions Myosin Action…

A: A muscle is a smooth tissue in animals. On the basis of structure, contractile properties, and…

Q: • Myosin pulls the actin strands • An action potential arrives at the neuromuscular junction •…

A: The muscles in the body in association with the skeleton system provide us with the desired…

Q: The binding of myostatin to its corresponding receptor on the plasma membrane of cells leads to…

A: The body is made up of large amount of muscles. These muscles are responsible for generating heat…

Q: During synaptic transmission, neurotransmitters help to open gates on the postsynaptic skeletal…

A: Excitation in pre-synaptic membrane => opening of calcium ion VGIC (voltage gated ion…

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: Both the withdrawal reflex and the Golgi tendon reflex involve sensory signals that ultimately…

A: The reflex arcs can be of two types called the somatic reflex arc and the autonomic reflex arc. The…

Q: Which of the following statements are true with regards to the differences between a neuromuscular…

A: The following statements are true with regards to the differences between a neuromuscular junction…

Q: If acetylcholinesterase fails to function properly at the neuromuscular junction, which of the…

A: The neurons are specialised cells of the human nervous system. The neurons of the nervous system…

Q: Which of the following pairs of terms is correctly matched?   Voltage-gated calcium channels :…

A: Correctly matchedTransmission of chemical synapses occurs when a nerve impulse reaches the…

Q: Using pyramidal motor tract as a template, describe the voluntary control of skeletal muscles being…

A: Pyramidal tracts consist of the corticospinal tract and corticobulbar tract.  The tracts are…

Q: The following is an oscilloscope tracing displaying the muscle twitch of an intact, viable frog…

A: The phenomenon shown in the graph is wave summation because the second wave has more amplitude as…

Q: sarcolemma Ex 201 ion channel Nas myosin cross bridge Nat acetylcholine axon axon sarcolemma ion…

A: Ans. The neuromuscular junction (NMJ), a synaptic connection, is created when the terminal ends of a…

Q: High blood K+ concentrations cause depolarization of the restingmembrane potential. Predict and…

A: Potassium is an important electrolyte needed for various functions in the body like muscle movement…

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: When compared to normal muscle, the response of the denervated muscle to electrical stimulation…

A: Normal muscle fibers appear polygonal in shape whereas denervated muscle appears angular and…

Q: Acetylcholinesterase is the enzyme that breaks down and inactivates acetylcholine. Some nerve gases…

A: Nerve gas binds to acetylcholinesterase enzyme but only at 1 site. Nerve gas has a phosphorus group…

Q: In muscles, acetylcholine is released by the _________________________and opens specific channels…

A: Answer : Motor  neuron , Sodium Ion

Q: How is the muscular contraction stopped (i.e.: how does a muscle relax after contraction)? 1. The…

A: Muscle Contraction is triggered when an action potential travels along the nerves to the muscles.…

Q: Neuromuscular Junction: -Activation of nicotinic ACh receptors in the motor end plate results in…

A: The junction between a motor neuron and a muscle fiber by which the nerve can communicate with…

Q: Succinylcholine act as adepolarising agent that prevents repolarization of the somatic motor neuron.…

A: Introduction: The functioning of the muscles gets hampered by the disturbance of the motor neuron…

Q: Why does damage to upper motor neurons cause spasticity and muscle cramps? Extracellular calcium is…

A: Spasticity is defined as a condition or state in which the muscles will stiffen or tighten thus,…

Q: Interruption of spindle discharge from a muscle causes contraction of the muscle to become jerky and…

A: Muscle spindle is small, spindle-shaped sensory receptors located in skeletal muscle tissue and they…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.