The axon hillock of a neuron reaches the threshold of excitation and the membrane potential becomes completely reversed. Then, suddenly, the membrane potential begins to return to resting membrane potential. What is the event that triggers this return to resting potential?   A. Na+ channels close in a voltage-dependent manner   B. Na+ channels close in a time-dependent manner   C. Na+ channels close in a chemically-dependent manner   D. Na+ channels open in a voltage-dependent manner

Q: Which of the following sentences is NOT correct? A. Axon can branch B. Afferent neurons are…

A: Axons can divide into many branches called telodendria. At the end of each telodendron is an axon…

Q: Match the description with the statement that best describes the following regions e dendrites +…

A: Neuron:

Q: Charge from depolarization along the axon reaches the axon terminal, but there is a lack of…

A: Neurotransmitters can be defined as a chemical molecules that are involved in the transmission of…

Q: The exocytosis of the synaptic vesicles depends on:

A: Synapse is the junction between two neurons. It is formed between the dendrites of one neuron and…

Q: Which of the following primarily reflects the opening of voltage-gated Na* channels? A. The resting…

A: Voltage-gated Na+ channels are gated, meaning that they can be opened or closed in response to…

Q: Which of the following insulates and protects a neuron’s axon, as well as helps speed along…

A: Introduction:- Nervous system consist of a network of specialized cells called neurons (nerve cells)…

Q: Answer the following questions in regards to voltage-gated channels in the neuron: a. What is the…

A: The neurons are the functional units of the nervous system that helps in sensory and motor…

Q: Voltage-gated Na+ channels are.... (select all that apply).  Group of answer choices: A. Opened by…

A: The channels are basically membrane proteins that act as transport protein through which various…

Q: Why does neuronal function require the voltage-gated K+ channels to open more slowly than the…

A: Voltage-gated channels are specialized proteins that are essential for the generation and…

Q: Which of the following is NOT an example of communication that happens from one neuron to another…

A: Answer: - Option a - Endocrine signalling (ex. hormones secreted into the bloodstream travel and…

Q: In signal transduction in the dark, the cGMP plays what role? a. It promotes an action potential…

A: Cyclic GMP (cGMP) is "Guanosine monophosphate" in which the phosphate group is covalently linked to…

Q: Use what you know about the physiology of neurons to answer the following questions. Treat questions…

A: Resting membrane potential is a state in which normally the neuron remains in, when there is no…

Q: At a chemical synapse, an action potential triggers an influx of Ca2+ which . Select one: O A.…

A: When the action potential reaches the presynaptic neuron terminal, it activates the voltage-gated…

Q: Which of the following statements regarding polarized membranes is incorrect? a. There is a…

A: At rest, the ionic composition of the interior and outside of a neuronal membrane varies. As a…

Q: What membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of…

A: Ans:- the option is (c)-the voltage gated sodium chennel.

Q: The two primary factors that influence the speed of an action potential propagation are axon…

A: The nervous system is an exceptionally complex piece of a creature that arranges its activities and…

Q: Depolarization and repolarization changes that occur during the action potential are produced by…

A: Introduction: Just neurons and muscle cells are fit for creating an action potential and that…

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: Which one of the following is true of the concentrations of ions inside and outside of an…

A: A neuron, also known as a nerve cell, is an electrically excitable cell that communicates with other…

Q: During the action potential, which of the following activity is LIKELY to occur? Select one: a. Na+…

A: An action potential (AP) occurs in physiology when the membrane potential of a given cell location…

Q: Where is the action potential generated initiated in the neuron? Select one: a. Nucleus of the…

A: The action potential is defined as the series of electrical changes that occur in membrane potential…

Q: A channel opens on a postsynaptic membrane that causes a negative ion to leave the cell. What type…

A: Graded potentials are changes in membrane potential that vary in size, as opposed to being…

Q: Using cable theory to describe axon conduction would tell us a. the larger the diameter of the axon…

A: In an ion cascades, action potentials move along neuronal axons. Transmembrane pathways near the…

Q: Neurotransmitters: a. Can only inhibit the postsynaptic cell b. Can be part of a process that…

A: Neurotransmitters are chemical messengers in the body. They transmit signals from neurona to the…

Q: Assume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an…

A: Neurotransmitters are compounds secreted from neurons at the synapse. The neurotransmitters can…

Q: During repolarization, what is the state of the voltage-gated Na+ channels? What about the…

A: Introduction: The brief cascade of changes occurring in membrane potential post excitation is…

Q: Neuron 1 fires an action potential, releasing neurotransmitters to neuron 2.  However, neuron 2 does…

A: The neurons are the nerve impulse generating and transmitting cells in the nervous system. The…

Q: Organophosphate pesticides inhibit the action of acetylcholinesterase. What effect does this have in…

A: Organophosphate pesticides (OP) are broad-spectrum chemical compounds comprised of a phosphate…

Q: an excitatory synapse and inhibitory synapse generate postsynaptic potentials on the same neuron…

A: PSP defines the changes of electric potential in a neuron for a transient period of time. It happens…

Q: Use this illustration to place these events in the order they occur during synaptic communication:…

A: The above image shows the transmission of nerve impulses across a synapse. A synapse is a small…

Q: What's the consequence of glutamate release when the postsynaptic membrane expresses NMDA but not…

A: Glutamate release at normal concentrations is crucial for brain functions such as learning and…

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: List the membrane potential value that would coincide with the following events: a. Resting…

A: The neurons have the tendency to transmit the physical stimulus in the form of an electrical…

Q: Which of the following allows the cell to recover from hyperpolarization during an action potential?…

A: The transmission of signals across the different regions of the body occurs in the form of…

Q: On what part of the neuron are NT receptors typically located?  If the activated NT receptors cause…

A: The correct option is C (action potential).Neurotransmitter receptors are located on the surface of…

Q: What statement about synapse activity is false? A.The input of sodium ions by AMPA receptors is…

A: The actual location where information is passed between neurons is at synapses. The connectors known…

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: Post synaptic neurons membrane potentials

A: Post synaptic neurons membrane potentials:These refer to the electrical charge difference across the…

Q: Post synaptic neurons membrane potentials are less negative than resting membrane potentials when…

A: Post-synaptic neurons are the neurons that receive signals (in the form of neurotransmitters) from…

Q: What causes the inside of a membrane to become positively charged during an action potential?

A: Answer: Action Potential : It is the rapid changes in the membrane potential of cell membrane. This…