a.Would an action potential travels faster in an axon with a wide diameter or a small diameter? b. Would an action potential travel faster in an axon that is myelinated or unmyelinated?

Q: - The spatial summation is the arrival of: a- Two action potentials at the same time at two…

A: When many presynaptic neurons operate together to release neurotransmitters such as acetylcholine…

Q: Based on the graph, how soon could another action potential be easily initiated (at the end of the…

A: Nerve cells or muscle cells have a tendency to transmit impulses. The changes in the electrical…

Q: If you increase the amount of neurotransmitter in the synaptic cleft, how would you expect the…

A: Neurotransmitter These are defined as the chemical messengers that carry chemical signals from one…

Q: neuron

A: An action potential is triggered by a graded potential that causes the membrane to depolarize until…

Q: When the neuron’s membrane is at rest, where are the sodium ions and potassium ions most…

A: Answer is b.) Sodium is mostly inside and potassium is mainly outside.

Q: Receptors for serotonin and many other neurotransmitters (a) are voltage-activated ion channels (b)…

A: Neurotransmitters like serotonin are responsible for the conduction of the impulses across the…

Q: Which of the following combinations of spatial summation of postsynaptic potentials (PSP) would…

A: The graded potential achieved by dendrites of a neuron while receiving synapses from other cells is…

Q: gradient is responsible for both the resting membrane potential and the action potential in the…

A: resting  neuron has a certai. voltage across its membrane called the resting membrane potential.

Q: When a neuron is inactive, more of which of the following exist OUTSIDE the neuron? A. Myelin…

A: Neuron is the fundamental unit of brain and nervous system. Neurons transmit signals from brain to…

Q: Which one of these is an example of an excitatory postynaptic potential in a typical neuron? a) A…

A: Introduction EPSPs Are Connected With A Transmitter-induced Increase In The Synaptic Membrane's Na+…

Q: Describe how action potentials are conducted by unmyelinated nerve fibers. Why is saltatory…

A: Introduction :- Conductability is the capacity to conduct the electrical along it's pathway. The…

Q: f the absolute refractory period of a neuron is 0.7 milliseconds, what is the maximum frequency of…

A: The trick used by the nervous system is that the intensity of the stimulus is encoded into the…

Q: Which of these is least likely to trigger an action potential in a post-synaptic cell?  A)EPSPs and…

A:

Q: a)Explain how the presynaptic cell "knows" when to release its neurotransmitter into the synaptic…

A: Neurotransmitters are often referred to as the body’s chemical messengers. They are the molecules…

Q: ou observe that a neuron treated with a metabolic inhibitor which prevents ATP generation still can…

A: Neurons are the basic unit of the nervous system. The lipid bilayer is selectively permeable and is…

Q: Describe how following a threshold stimulus, a action potential is carried along an unmyelinated…

A: Myelination refers to the presence of a myelin sheath on the axons. Myelin sheath is composed of…

Q: What is the point A on the graph? Define this term. B) What ions are moving at B on the graph, what…

A: Action potential An action potential is defined as the sudden rise and fall in the membrane…

Q: Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What…

A: Neurons are the basic functional unit. It is a specialized cell that is designed to transfer…

Q: Consider the image.  The neuron labeled number _____ in the figure is a motor neuron; its function…

A: Motor neurons carry signals from the central nervous system to the outer parts such as muscles,…

Q: In the hippocampus, when glutatmate is released into the synaptic cleft, but the postsynaptic cell…

A: Neurons are the basic structures and functional units of the nervous system. The axon or the…

Q: Saltatory conduction is a term applied to the "jumping" movement of action potentials Multiple…

A: Saltatory conduction is the movement of the action potentials along the myelinated axons from one…

Q: Describe how depolarization occurs along an unmyelinated neuronal axon

A: Propagation of action potential leads to the depolarization of neuron.

Q: How do neurotransmitters directly affect the postsynaptic neuron? A)They cause a change in the…

A:

Q: During an action potential _______    A. Na+ flows out of cell and causes depolarization  B. K+…

A: A characteristic pattern of rapid rise and subsequent fall in voltage or membrane potential across a…

Q: What guarantees that there are unidirectional action potential? A. threshold B. depolarization…

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: Explain how myelin helps speed up the conduction speed of action potentials along the axon of the…

A:

Q: On the graph above, when do the sodium ion channels close? Select one: a. between 0.2 ms and 0.5 ms,…

A: When the stimulus is provided, the Sodium ion VGIC's (Voltage-gated ion channel) move from resting…

Q: a. Explain how a graded membrane potential is created when a neurotransmitter is bound by a…

A: When a neurotransmitter is bound by a postsynaptic cell, there is a change in the resting membrane…

Q: Why is that if A, B, and D neurons were all activated, an action potential in neuron C would not…

A: Because A and D are excitatory neurons and when B is activated it suppresses the activity of A which…

Q: Starting with the action of a neurotransmitter at the postsynaptic end of a neuron, what happens to…

A: Introduction: Neurotransmitters is the chemical messengers our  body can't function without it…

Q: Suppose you want to cause the presynaptic terminal of an axon to release its transmitter. How could…

A: Synapse was name given by Sherrington. Synapse is junction between two neurons where information is…

Q: Which is the correct order of the firing of a neuron?

A: Neurons are structural and functional unit of the nervous system. Neurons control the activity of…

Q: Explain what will happen in an axon undergoing an action potential but which is unable to utilise…

A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…

Q: Refer to the graph showing the course of an action potential. Which of the numbered points along the…

A: As the membrane potential is increased, sodium ion channels open, allowing the entry of sodium ions…

Q: Imagine you are studying the activity of neurons in a mouse that is awake and interacting with other…

A: Neurons are the fundamental units of the nervous system. These are responsible for receiving sensory…

Q: Use Figure Q1(b) of an action potential to answer questions (1) until (iv) below. Choose the correct…

A: Nerve impulse refers to an electrical or chemical signal that is transmitted along  a fibre. The…

Q: How much of a change in the membrane potential is necessary for the summation of postsynaptic…

A: Resting membrane potential of a cell is the electrical potential difference existing across the…

Q: Assume a neuron's membrane potential is -60 mV, what's the net consequence on the membrane potential…

A: Action potentials are produced by axons and transmitted to local neurons. When a local neuron gets…

Q: One EPSP from neuron A depolarizes the initial segment of a neuron by +2 mV, one EPSP from neuron B…

A: 4) Mechanism of nerve conduction : • The action potential in pre synaptic neuron reaches its…

Q: What part of the membrane composition of a neuron is most important for the permeability of the…

A: b: There are proteins embedded in the membrane

Q: If a postsynaptic cell has synapses from five different cells, and three cause EPSPs and two of them…

A: Postsynaptic potentials are membrane potential changes of a chemical synapse’s postsynaptic…

Q: Which of the following would occur if a neuron was experimentally stimulated simultaneously at both…

A: Intercellular fluid (ICF) is the plasma that has left the capillaries and streamed into the spaces…

Q: Which statement is true? Select one: a. All axons, dendrites, and cell bodies are myelinated b. Some…

A: Neurons are called as the structural and functional unit of the nervous system as they receive and…

Q: We know the action potential threshold regulates whether a neuron fires an action potential or not.…

A: Action potential refers to the rapid increase followed by decrease in the voltage or membrane…

Q: Sequence the following list of events of a neuronal action potential by placing 1 next to the first…

A: Action potentials are those electrical impulses that send certain specific signals around your body…

Q: Match the description with the statement that best describes the following neural circuits. a single…

A: Neural circuits are groups of neurons interconnected by synapses to carry out a specific function…

Q: what letter represents dorsal white column b) what letter represents structure that carrys motor…

A: In the given transverse section of the spinal cord  A :  dorsal root ganglion  B : dorsal root…

Q: Describe how an action potential in a presynaptic neuron causes a) an excitatory postsynaptic…

A: At the chemical synapse the presynaptic and postsynaptic cells are not in physical contact but are…