Given that a neuron's action potential moved at a speed of 105 m/sec, would you expect this neuron to be myelinated or non-myelinated? Why? Choose the best answer. O non-myelinated because the absence of myelin tends to allow neurons to transmit signals faster O myelinated because the absence of myelin tends to allow neurons to transmit signals faster O both myelinated and non-myelinated types of neurons are capable of transmitting signals at the rate Next « Previous

Given that a neuron's action potential moved at a speed of 105 m/sec, would you expect this neuron to be myelinated or non-myelinated? Why? Choose the best answer. O non-myelinated because the absence of myelin tends to allow neurons to transmit signals faster O myelinated because the absence of myelin tends to allow neurons to transmit signals faster O both myelinated and non-myelinated types of neurons are capable of transmitting signals at the rate Next « Previous

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

Match the letters with the correct part of the neuron in the picture below: A A V [ Choose ] Axon terminals Myelin Sheath Dendrites Аxon Cell body of the neuron [ Choose ] [ Choose ] E [ Choose ] > B.
A loss-of-function mutation in the ion channel responsible for thegeneration of end-plate potentials results in a diminished permeabilityof the ion channel. 1) How would you experimentally test the effect of the mutation on thefunctional properties of the cell (synapse)? You should discuss the typesof postsynaptic responses and physiological parameters you couldmeasure.
In the autoimmune disease multiple sclerosis, a person's immune system attacks and destroys the myelin sheath cells. What occurs as a result of the destruction of these cells? Action potentials can travel in two directions. None of the answer choices are correct. O The sodium-potassium pumps malfunction. The speed of action potentials decreases. Signals cannot be transmitted across the synapse.
Which of the following are the likely explanations for the failure of a postsynaptic neuron to trigger an action potential? Select all that apply. The EPSPs are neutralized by the neurotransmitter The summation of IPSPs and EPSPs is insufficient to depolarize the cell to threshold The synapses generating the EPSPs are too close to the axon hillock The synapses generating the EPSPs are too far from the axon hillock
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. 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 in the 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 neurotransmitters depending on their location and function
Please help me to reorder the items below to correctly label the numbers in the diagram.
What is the importance of the sodium-potassium pump in neuron function? What do you think would be the effect on action potentials if the sodium-potassium pump stopped functioning due to the lack of ATP?
Which of the following neuronal changes is associated with short term synaptic strength? O a. Changes in the size of neural spines o b. Changes in the shape of neural spines с. Increased production of neurotransmitter vesicles in the presynaptic cell o d. Increased buildup of Ca²+ in the terminal knob of the presynaptic axon О е. Increased expression of postsynaptic neurotransmitter receptors
structures in the following diagram of a neuron. ?do it
The giant squid axon has a diameter = 1mm and 1 = 13mm. Compared to a mammalian neuron with a diameter = 1 um and ^ = 0.2mm, which of the following is correct? graded potentials can generate action potentials in the mammalian axon but not in the squid axon. graded potential of similar magnitude would result in action potentials with larger amplitude in the mammalian axon graded potentials of similar magnitude would result in action potentials with larger amplitude in the squid axon graded potentials of similar magnitude would travel furthest from their point of origin in the mammalian axon graded potentials of similar magnitude would travel furthest from their point of origin in the squid axon
Which of the following situations in a neuron results in action potentials that have extended depolarization phases? O None of these result in extended depolarization phase. O Compromising the inactivation mechanism in voltage-gated Na* channels. O Stimulating the voltage-gated K* channels. O Inhibiting the voltage-gated Na* channels. O Compromising the inactivation mechanism in voltage-gated K* channels.
A theoretical drug blocks Na* leak channels - what effect would this have on a neuron's resting membrane potential and why? Would this drug affect the neuron's ability to generate an action potential and why/why not?