A research scientist is developing a new drug that blocks muscle cellreceptors that, when activated, stimulate a muscle contraction. In her firstexperiment, she used 250 mg of the new drug but saw no effect. In hersecond experiment, she increased the dosage to 750 mg. This dosagewas successful in blocking the muscle stimulation. Explain why increasingthe dosage would affect the outcome of the experiment.

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: This patient was given potassium ions intravenously and regained normal muscle functioning in a very…

A: Potassium is a mineral, our body cells need this, it regulates our major body parts functions such…

Q: Bank: A. Contraction C. Relaxation B. Myosin filament D. Actin filament C. Endocrine E. Contact…

A: A group of cells that have similar structure and that function together as a unit are known as the…

Q: Botox  has become popular for reducing wrinkles.  It is a dilute solution of a toxin which inhibits…

A: Botox injections block specific chemical signals from nerves, for the most part signals prompt…

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: We learned about Telemedicine, including some of its benefits and limitations. Keeping in mind that…

A: Telemdicine refers to the practice of providing medical care and consultation to patient using…

Q: Why is Excitation Contraction Coupling important?

A: Muscles contraction  The contraction of muscle activated by the tension generating sites present in…

Q: In an experiment, the strength of a neural stimulus and the resulting muscle contraction are…

A: The neuron is the basic unit of the complex nervous system. It helps in transmission of information…

Q: Table1.Contractionofsmoothmusclebythreeagonists Contractileresponse(mm) Log[agonist] (M) -10 -9 -8.5…

A: Here, contraction of smooth muscle using increasing concentration of three agonists is given. The…

Q: ted to design a drug that interfered specifically with skeletal muscle, without effecting cardiac or…

A: Drug design regularly alluded to as a rational medication plan or just reasonable plan is the…

Q: Which of these is the proper sequence of these events of muscle contraction 1) Action potential…

A: Based on option, the correct order is 1, 3, 4 and 2. Steps in initiating contraction: Whenever…

Q: How do calcium ionsparticipate in musclecontraction? Why do bothmuscle contraction andmuscle…

A: Muscle contraction is the process of activating tension generating sites in the muscle fibers.…

Q: *When dynamic y-motor neurons are activated at the same time as a-motor neurons to muscle,

A: When dynamic y—motor neurons are activated at the same time as a—motor neurons to muscle, a prompt…

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: You decide to do a series of experiments to determine where the toxin has its effect. You accomplish…

A: The correct option is B. Either the alpha motor neurons ability to conduct action potentials or the…

Q: An unexpected discovery from studies of ameboid movement is that the same proteins found in the…

A: A crucial characteristic of animals is movement. Animal movement takes place in various forms in…

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: 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: Which of the conditions would result in the greatest action potential frequency in afferent neurons…

A: An action potential in neurons happens when a neuron transmits information through the axon to other…

Q: Explain why some domesticated birds, like turkeys andchickens, have mostly fast-twitch fibers in…

A: A muscle fiber is a bundle of cylindrical shaped structure found in the muscle. Their primary…

Q: The following were extracellular recordings obtained from the giant nerve fibers of an earthworm…

A: The correct answer to this question is option A. To calculate the action potential conduction…

Q: Increased γ-motor neuron discharge stimulates muscle spindles, because :-a- it produces stretch of…

A: A gamma motor neuron (γ motor neuron) is a type of lower motor neuron, which takes part in the…

Q: Explain the intracellular mechansim of smooth muscle relaxation of agaonist such as mepyrimine and…

A: Agonists like mepyramine and atropine relax the smooth muscle by activating certain intracellular…

Q: What do you mean by myofibrils?

A: Muscle cells are also referred to as myocytes. These are the cells that made up the muscle tissue.…

Q: How are motor neurons involved in muscle contractions? Select all that apply. The release of calcium…

A: It is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord and…

Q: If ligand-gated K+ channels were to open in an unstimulated muscle fiber,how would this affect the…

A: The ligand-gated channels are those channels that open in response to the ligand which could be…

Q: muscle spidnles are _____ receptors and provide ____ information, whereas golgi tendon organs…

A: The majority of skeletal muscles contain this stretch receptor, which is widely distributed. When a…

Q: In the rare neuromuscular disorder Myasthenia Gravis, autoantibodies are produced which inhibit…

A: Introduction:-  Myasthenia Gravis is a disease of neuromuscular junction in which the acetylcholine…

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: Why is muscle that has sustained significant damageunable to produce the same amount of power as it…

A: The muscle is a type of contractile tissue. It provides contractibility, elasticity, and…

Q: Eventually, the peak will not be able to increase in size even if the stimulation intensity…

A: The compound action potential (CAP) is defined as the summation of each nerve fiber's action…

Q: Acetylcholine-gated cation channels at the neu-romuscular junction open in response to…

A: The term "neurotransmitter" refers to a chemical messenger that binds to receptors on the…

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: You cut the axon of a single motor neuron innervating the biceps muscle. Which of the following is…

A: Motor neurons, often referred to as efferent neurons are the type of neurons responsible for…

Q: The experiment that crossed the nerve from a muscle that had a short contraction time "a fast…

A: b.False Detailed explanation given below ?

Q: When the γ-motor neuron discharge to a muscle decreases, it causes :-a- increased muscle spindle…

A: The nervous system plays a major role in transmitting the reflexes from the tissues to the brain.…

Q: Explain the intracellular mechansim of smooth muscle relaxation of agaonist such as mepyrimine and…

A: There are a few important points : Skeletal muscles will be attached to bones by tendons composed…

Q: Experimenters can separate F-actin thin myofilaments frommyosin thick myofilaments. First they…

A: Muscle tissues can change their length in response to the stimulus.

Q: Please describe the connection between neurotransmitters and sarcomeres

A: Sarcomere is repeating contractile unit of myofibrils. It is the segment between the two Z lines.…

Q: Why is myosin II the only myosin capable of producing contractile force?

A: Introduction Myosins are a group of motor proteins that play a key role in muscle contraction and a…

Q: Whether the statement, "Motor neurons trigger action potentials in muscle cell membranes that open…

A: Introduction Action potentials are means of cellular signal transmission between two and many…

Q: The diagram below represents the terminal cisterna in a muscle. Name and briefly explainthe function…

A: Nerve Impulse: It all starts with a nerve impulse reaching the neuromuscular junction, where a motor…

Q: Pluripotent stem cells undergo a number of changes as they progress through developmental stages to…

A: Self-renewal and potency serve as the basis for the definition of pluripotent stem cells. The…

Q: Now in your own words, EXPLAIN (1) howa neural impulse is transferred to a muscle cell this is the…

A: Neural impulse or a nerve impulse refers to a signal that is transferred along the nerve fiber. It…

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…

Q: An ion that is essential for muscle contraction is Ca2+.  Which of the following statements about…

A: calcium ions play a very important role in muscle contraction. Actin and myosin work together during…

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.