Muscle twitching can be explained by the_________ action of synapse. A. Cell signalling B. Temporal Summation C. Spatial Summation D. All for nothing response
Q: When arm muscles hurt after heavy exercise, the pain is detected bya. neurotransmitters.b.…
A: A nerve cell or neuron is the basic building block of the nervous system. This is known as the…
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: γ-motor neuron discharge to a muscle is inhibited by impulses reaching the γ-motor neurons from all…
A: A gamma motor neuron cell bodies are located in the anterior grey column of the spinal cord. A gamma…
Q: 3. Activation of Golgi tendon organ of a given muscle: a- Activates motor neurons that return to the…
A: *The Golgi tendon organ also called as neurotendinous spindle which is a proprioceptor that was a a…
Q: A student athelete measured his running performance on a treadmill and found the following data: 15…
A: There are two main types of skeletal muscle fibers. They are type I (slow-twitch muscle fibers) and…
Q: h) Depolarization of the T tubule membrane activates the sarcoplasmic reticulum via a) muscarinic…
A: INTRODUCTION In the membrane structure T - tubule membrane is mainly associated with a…
Q: A. Mechanical stimulation (pinching free end of nerves between two glass rods) B. Threshold stimulus…
A: In frog, the sciatic nerve is a collection of nerve fibers present in a single bundle. These fibers…
Q: Which role do gamma (γ) motor neurons play in the function of a muscle spindle? Select one: a.…
A: Gamma motor neurons work in muscle contraction and represent 30 percent of the group A nerve fibers…
Q: ach
A: B. ACH or Acetylcholine is the only neurotransmitter that is present in the somatic muscular…
Q: Motor neurons release what type of neurotransmitter onto the motor end plate of skeletal muscles?…
A: Motor neurons of the spinal rope are essential for the central nervous system (CNS) and interface…
Q: a. Describe the relationship between stimulus voltage and the force of contraction b. What was the…
A: The threshold stimulus voltage is found by varying the stimulus voltage slightly to discover the…
Q: Caffeine prolongs the life span of acetylcholine molecules in the motor junctions. Explain how this…
A: Caffeine is naturally present in tea, coffee and it stimulates the the brain and central nervous…
Q: Describe the functions of gamma motor neurons and explain why they are stimulated at the same time…
A: The gamma motor neurons innervate the muscle spindle at every finish. they permit contraction of the…
Q: While initial control of skeletal muscles occurs with the motor cortex, a successful movement also…
A: The motor movements required coordination of central nervous system that controls the muscle…
Q: Match the component of the neuromuscular junction with the correct terminology. v somatic motor…
A: Neurons are the nerve cells in the human nervous system. The neurons can transmit nerve signals from…
Q: Selective destruction of a motoneurons in the spinal cord will have which of the following effects…
A: Introduction Muscles are soft tissues found in both animals and humans, it is the fibrous tissue in…
Q: Which event listed above is the point at which myasthenia gravis interrupts the process? A. Nerve…
A: A neuron is the structural and functional unit of the nervous system. It helps in the transmission…
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: Describe the roles of ATP in the sliding filament mechanism of skeletal muscle contraction. (b)…
A: Sliding past theory explains the process of various muscle proteins such as actin and myosin sliding…
Q: What is the function of acetylcholinesterase? O a. to prevent undesired continuous contractions O b.…
A: Acetylcholinesterase is an enzyme that is available at the postsynaptic membrane of the…
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: The neurotransmitter that initiates events leading to skeletal muscle contraction is A. creatine…
A: Skeletal muscle can be outlined as the muscles of the body that are voluntary in action. They are…
Q: Number 5 in Graph B represents iand is the result of i The statement above is best completed by the…
A: Need to find what the label 5 represents in the graph given.
Q: Discharge from muscle spindles could be increased by all the following, except :-a- increased…
A: Muscle tissue is soft tissues that provide ability to contract. Cardiac muscle, skeletal muscle, and…
Q: The drug Botox prevents wrinkles by preventing muscles from contracting. Specifically, it prevents…
A: Botulinum toxin is a neurotoxic protein produced by the bacterium Clostridium botulinum.
Q: Explain why the ratio of motor neurons to muscle fibers isgreater in muscles that control eye…
A: The muscle system is responsible for several functions such as maintaining body posture, locomotion,…
Q: a. At what time point did would a nerve begin to fatigue? Comment on the percentage decrease in…
A: Introduction Muscle fatigue:- It is a decrease in maximal force or power production in response to…
Q: In relation to the size principle of motor unit recruitment, the mechanism of recruitment f) order…
A: The process of activating different motor units to achieve a specific level and kind of muscular…
Q: Which of these events occurs when a person steps on a tack with theright foot?a. The right foot is…
A: A direct impact or a penetrating injury, or a fall may cause acute injury or twisting, jerking, or…
Q: What determines the effect of neurotransmitter release on the post-synaptic neurons? a. the size of…
A: Neurotransmitters are chemicals responsible for carrying a signal or an impulse via a synapse. They…
Q: Graph A in this diagram represents A) summation and tetanus of a smooth muscle fibre. C) a simple…
A: Skeletal muscles Skeletal muscles are attached to the body part which is involved in movement like…
Q: What is the role of calcium in muscle contractions? Multiple Choice a) To spread the action…
A: Muscle contraction It is the activation of tension-generating regions in the muscle fibers. It…
Q: Describe the effect of the botulinum toxin, which inhibits the release of acetylcholine at the…
A: Botulinum toxin is also known as the miracle poison. It is defined as a neurotoxin formed by the…
Q: A bacterial toxin is known to block the release of ACh at the motor end plate of skeletal muscle.…
A: (c) the ability to stimulate the muscle is impaired
Q: All motor neurons release acetylcholine as a neurotransmitter except a. Postganglionic sympathetic…
A: The autonomic nervous system acts mostly unconsciously and regulates bodily functions, such as…
Q: Lower motor neurons are _____________ neurons. A. multipolar B. bipolar C. unipolar D. anaxonic
A: Motor neurons These are a part of central nervous system which connect to muscles, glands and…
Q: 1. A receptor absorbs the energy of a stimulh by means of a. Reception b. Transmission c.…
A: Physiology is defined as the study of the way the human body works. It tells the basic and complex…
Q: One tretment for myasthenia gravis is a medication that blocks the activity of acetylcholinesterase.…
A: Myasthenia gravis: It is an autoimmune condition where the immune system attack between muscles and…
Q: In which of these ways does a metabotropic synapse differ from an ionotropic synapse? a. Its effects…
A: The binding of neurotransmitters activates the ionotropic and metabotropic membrane-bound receptors.…
Q: Explain how more than one smooth muscle cell can be influenced by an action potential generated in…
A: Explain how more than one smooth muscle cell can be influenced by an action potential generated in…
Q: A K FL
A: Nervous system coordinates and controls the activities of the animals such as perceptions, behaviors…
Q: Somatic motor neurons have axons the conduct signals from the CNS to _ ; and are usually under _…
A: The nervous system is a complex system of nerves and specialized cells known as neurons. The nervous…
Q: Binding of neurotransmitter to the motor end plate leads to depolarization because the…
A: Events that occur at neuromuscular junction that results in muscle contraction are : Action…
Q: The discharge from Golgi tendon organs initiated by excessive stretch ofa skeletal muscle produces…
A: Introduction Golgi tendon organ are the proprioceptor (sense organ) which receives the information…
Q: When you lift a heavy box, your muscles need to generate a stronger than average contraction. What…
A: Muscle contraction is the mechanism of tightening, shortening, or lengthening of muscles that occurs…
Muscle twitching can be explained by the_________ action of synapse.
A. Cell signalling
B. Temporal Summation
C. Spatial Summation
D. All for nothing response
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Summationa. is caused by combining two or more graded potentials.b. occurs at the trigger zone of the postsynaptic neuron.c. results in an action potential if it reaches the threshold potential.d. can occur when two action potentials arrive in close succession ata single presynaptic terminal.e. All of these are correct.Which of these terms is correctly matched with its definition ordescription?a. depolarization: membrane potential becomes more negativeb. hyperpolarization: membrane potential becomes more negativec. hypopolarization: membrane potential becomes more negativeMatch the description with the statement that best describes the following neural circuits. a single post-synaptic neuron receives input from multiple pre- synaptic neurons causes the stimulation of the post-synaptic neuron continually similar to a positive feedback response A. diverging circuits B. converging circuits C. reverberating circuits causes a longer lasting stimulus of the post-synaptic neuron D. parallel after discharge circuits a single pre-synaptic neuron synapses with multiple post-synaptic neurons Moving to another question will save this response. Photos A39 DEC 3 17 étv
- Determine whether each statement is true or false. If a statement is false, explain why. A. Voltage gated sodium channels are quick to open and slow to close, while voltage gated potassium channels are quick to open and slow to close. 6. Before a second action potential can be generated, the concentration of sodium and potassium on either side of the cell membrane must be fully restored. C. The strength of an action potential is represented by the amplitude of the wave. A stronger stimulus will generate an action potential with a higher peak than a weaker stimulus. D.. Action potentials travel in a non-decremental manner down the axon, with the voltage constantly being regenerated along the way, unlike graded potentials which quickly diminish over short distances. E. Contiguous conduction is faster than saltatory conduction. F. Action potentials originate in the axon hillock and travel down the axon to the terminal boutons (pre-synaptic axon terminals).Regardless of type, all neurons transfer signals between each other or to effectors (muscles or glands) at a synapse. The neuromuscular junction that we talked about with the muscular system is one example of a synapse. The diagram below shows the general features of a synapse Match each term or description with the appropriate letter in the diagram. You may use terms more than once. 1. Synaptic knob in axon terminal of pre-synaptic cell: 2. Synaptic cleft: 3. Neurotransmitter: 4. Dendrite of post-synaptic cell: 5. Cell body of post-synaptic cell: 6. Receptor in plasma membrane of post-synaptic cell: 7. Chemical released by neurons that stimulates or inhibits other neurons, muscles, or glands: 8. Cell that sends the signal: 9. Dendrite of cell that receives the signal: 10. Space between cells that must be crossed by neurotransmitters: 11. Structure that opens, like a "protein door", when neurotransmitters attach to it:An inhibitory presynaptic neuron can affect a postsynaptic neuron bya. producing an IPSP in the postsynaptic neuron.b. hyperpolarizing the plasma membrane of the postsynaptic neuron.
- In the stretch reflex,a. Golgi tendon organs activate contraction in extrafusal muscle fibersconnected to that tendon.b. lengthening of muscle-spindle receptors in a muscle leads tocontraction in an antagonist muscle.c. action potentials from muscle-spindle receptors in a muscle formmonosynaptic excitatory synapses on motor neurons to extrafusal fiberswithin the same muscles.d. slackening of intrafusal fibers within a muscle activates gamma motorneurons that form excitatory synapses with extrafusal fibers within thatsame muscle.e. afferent neurons to the sensorimotor cortex stimulate the agonist muscle to contract and the antagonist muscle to be inhibitedThe resting membrane potential of a neuron or muscle cell is a. equal to the potassium equilibrium potential. b. equal to the sodium equilibrium potential. c. somewhat less negative than the potassium equilibrium potential. d. somewhat more positive than the sodium equilibrium potential. e. not changed by stimulation.A synapse with all of these; a postsynaptic dendrite, an astrocyte end foot, and the presynaptic terminal button/bouton is called..... A. synaptic convergence B. engulfment synapse C. tripartite synapse D. receptor confluence synapse E. astrocytic engulfment
- You are a famous researcher working in your lab. You isolate a piece of muscle (call it Muscle A) and examine its innervations. You find a short preganglionic neuron synapsing onto a long postganglionic neuron, which synapses onto the muscle. Then you examine Muscle B and find a single neuron innervating it. Remembering your favourite physiology class, you instantly recognize what types of neuronal connections you will find on both Muscle A and Muscle B. First give 2 characteristics of the synapse onto Muscle A. Then give 2 ways in which the synapse of Muscle B will be different.A biologist finds that a post-neuron responds to a pre-neuron’s AP in a mammal through a cell membrane pathway involving INTRACELLUAR Ca2+ RELEASE. Define what type of synapse this is and the specific possible mechanism (details!) about how binding the neurotransmitter on the post membrane causes this type of calcium release.During a relative refractory period of an action potential A. Another action potential can be fired, it just takes a greater stimulus for the membrane potential to reach threshold B. Na+ channels are either already open or are inactivated therefore the membrane absolutely can not produce another action potential, no matter how intense the stimulus C. Ca++ flows out of the cell, causing hyperpolarization and a need for a greater stimulus to generate the action potential D. The presynaptic neuron "tells" the postsynaptic neuron about the "relative" strength of signal E. None of the above are correct
