Which of the following statements are true with regards to the differences between a neuromuscular junction, and a standardcentral nervous system (CNS) synapse? Select all that apply.O The neuromuscular junction is a synapse between a neuron (alpha motor neuron) and a muscle fibre. CNS synapses connect two neurons.The graded potential generated by a neuromuscular junction has a much larger voltage than that of a CNS synapse.The structure of the neuromuscular junction ensures that an action potential in the alpha motor neuron always results in an action potential inthe post-synaptic muscle fibre. CNS synapses do not guarantee this.The neuromuscular junction always uses Acetylcholine as a neurotransmitter, whereas CNS synapses may use a variety of neurotransmittersdepending on their location and function

Which of the following statements are true with regards to the differences between a neuromuscular junction, and a standard central nervous system (CNS) synapse? Select all that apply. The neuromuscular junction is a synapse between a neuron (alpha motor neuron) and a muscle fibre. CNS synapses connect two neurons. The graded potential generated by a neuromuscular junction has a much larger voltage than that of a CNS synapse. O The structure of the neuromuscular junction ensures that an action potential in the alpha motor neuron always results in an action potential in the post-synaptic muscle fibre. CNS synapses do not guarantee this. O The neuromuscular junction always uses Acetylcholine as a neurotransmitter, whereas CNS synapses may use a variety of neurotransmitters depending on their location and function

Which of the following statements are true with regards to the differences between a neuromuscular junction, and a standard central nervous system (CNS) synapse? Select all that apply. The neuromuscular junction is a synapse between a neuron (alpha motor neuron) and a muscle fibre. CNS synapses connect two neurons. The graded potential generated by a neuromuscular junction has a much larger voltage than that of a CNS synapse. O The structure of the neuromuscular junction ensures that an action potential in the alpha motor neuron always results in an action potential in the post-synaptic muscle fibre. CNS synapses do not guarantee this. O The neuromuscular junction always uses Acetylcholine as a neurotransmitter, whereas CNS synapses may use a variety of neurotransmitters depending on their location and function

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 3TAHL

See similar textbooks

Similar questions

Stellate cells initially process sensory input to the cortex, whereas pyramidal cells send fibers from the cortex to terminate on efferent motor neurons. (True or false)
hen an action potential arrives at the nerve terminal of a neuromuscular junction, which of the following statements best describes the events that occur? Depolarisation of the nerve terminal causes the release of ACh which activates nicotinic receptors on the skeletal muscle membrane to cause Ca2+ entry and muscle contraction. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores causing the release of ACh which activates voltage-gated Na+ channels at the end-plate. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores causing the release of ACh which binds to muscarinic receptors at the end plate. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores…
The axon of neurons contains microtubules with the minus end situated toward the cell body and the plus end situated toward the end of the axon. Neurotransmitters are transported in vesicles carried by motor proteins. A neuron missing which of the following motor proteins would be unable to secrete neurotransmitters in this way? Group of answer choices: Myosin Kinesin Dynein
When an action potential arrives at the neuromuscular junction, acetylcholine is released into the synaptic cleft and binds to receptors in the postsynaptic membrane. Which of the following represents the correct order of the next series of events? A. An action potential travels down the T tubules, depolarization spreads through the T tubules, Ca2+ is released from the sarcoplasmic reticulum, and myosin binds to actin. B. Ca2+ is released from the sarcoplasmic reticulum, an action potential travels down the T tubules, depolarization spreads through the T tubules, and myosin binds to actin. C. An action potential travels down the T tubules, depolarization spreads through the T tubules, Ca2+ is taken up by the sarcoplasmic reticulum, and myosin binds to actin. D. T tubules are depolarized, Ca2+ is released from the sarcoplasmic reticulum, an action potential is created in the muscle cell, and myosin bonds to actin. E. An action potential travels…
The electrochemical gradient of a muscle cell at rest or its resting membrane potential is slightly negative inside the plasma membrane and slightly positive just outside the plasma membrane and has an ionic gradient of more potassium ions inside the cell and more sodium ions outside the cell. Therefore, a muscle cell at rest is said to be __________________ and has membrane potential. about to exocytose synaptic vesicles containing acetylcholine polarized experiencing an action potential about to allow an influx of potassium ions into the cell depolarized
A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels,and it also contains voltage-gated Na+ channels of the type found in neurons. Intheory, could a muscle cell get away with having only acetylcholine-gated cationchannels, which would serve the dual purpose of receiving neurotransmitter signalsand propagating action potentials? Why or why not?
Muscle Contraction In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle ﬁbre is observed in this experiment. One end of the muscle ﬁbre is attached to a mass. The following data were obtained from the experiment. Number of Trials Strength of Stimulus (mV) Mass Lifted by Muscle Contraction (g) 1 20 0 2 40 0 3 60 50 4 80 50 5 100 Not Tested 6 120 50 *note that the voltage applied is positive in order to raise potential from resting to threshold Identify the manipulated, responding and controlled variables in the experiment described above. Strength of Stimulus Number of Muscle Fibre Stimulated Mass Lifted by Muscle Contraction
Which of the following statements about action potentials and information transmission in the synaptic cleft is FALSE? 1. Action potentials determine the amount of neurotransmitters that are released into the synaptic cleft 2.Action potentials ultimately result in more calcium leaving the target cell at the postsynaptic membrane 3. Action potentials determine the duration that neurotransmitters are released into the synaptic cleft 4. Action potentials ultimately result in more calcium entering the neuron at the axon terminal
During synaptic transmission, neurotransmitters help to open gates on the postsynaptic skeletal muscle cell. When those gates open, what passes through them to trigger an action potential in the skeletal muscle cell? sodium potassium calcium acetylcholine
The venom of some cobras contains a mixture of substances that have a variety of physiological effects. One substance in the venom works by preventing acetylcholine from binding to muscle receptors. Which of the following describes the effect of the venom on the prey of the cobra? Question 5 options: Muscle contractions are prevented, causing paralysis. Muscle contractions occur, but refractory periods would be longer. Action potentials are continuously generated, causing tetanus. Weak muscle contractions occur but are limited by ATP production by glycolysis.
An effector neuron is a motor neuron that transmits impulses from the CNS to an effector (muscle or gland).In an experiment, it was determined that the effector neuron for muscle fibre 1 had a threshold level of –5 mV. The effector neuron for muscle fibre 2 had a threshold level of –16 mV. An electrical probe was used to stimulate these two effector neurons of the muscle fibres. Which of the following rows correctly identifies the reaction of each muscle fibre based on the applied stimulus voltage? Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Relaxed Contracted b. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Contracted Relaxed c. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Contracted Relaxed d. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Relaxed Contracted
Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse? a) they inhibit the action potential causing it to stop b) Calcium channels have no role in this process c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft