Which of the following best describes the electrical state of a neuron at rest? a. The inside of a neuron is more negatively charged than the outside. b. The outside of a neuron is more negatively charged than the inside. c. The inside and the outside of a neuron have the same electrical charge. d. Potassium ions leak into a neuron at rest.

Q: Which of the following statements about membrane ion channels is incorrect? a. mechanically gated…

A: Ion channels are located in the membrane. They can be voltage-sensitive, ligand-gated, or…

Q: The release of a neurotransmitter from a terminal button produces an inhibitory postsynaptic…

A: The neurons, also known as the nerve cells, are responsible for conduction of an impulse. The…

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

A: Neuron:

Q: A(n) ________ neuron has one axon and one dendrite extending directly from the cell body. a.…

A: Neurons are the basic structural and functional unit of the nervous system that consists of cell…

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: Which of the following is TRUE regarding the absolute and relative refractory periods of the action…

A: The relative refractory period is that the interval of your time throughout that a second action…

Q: Schwann cells are a type of glial cell found in the nervous system. In addition to the conduction of…

A: Neurilemma is also known as sheath of Schwann is the outermost nucleated cytoplasmic layer of…

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: A neuron without an axon would be unable to     a. conduct nerve impulses     b. divide     c.…

A: A neuron is a structural and functional unit of the nervous system. It is capable of perceiving any…

Q: Schwann cells are a type of glial cell found in the nervous system. In addition to the conduction of…

A: Schwann cells are the major glial cells found in the peripheral nervous system (PNS). They provide…

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: The cell body of a neuron does all of the following except a. release neurotransmitter into the…

A: The Cell body is the neuron's core and it is also called the soma. It carries genetic information,…

Q: This graph shows the relative voltage of a neuron's cytoplasm near the plasma membrane relative to…

A: * There are three stages in membrane potential  Depolarization  Repolarization Hyperpolarisation…

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: When a neuron’s resting potential is occurring, the neuron is __________ charged on the inside. a.…

A: Neuron is a cell present in the nervous system that is accountable for receiving and transmitting…

Q: Local anesthetic is often used in dentistry to lessen the sensation of pain during dental…

A: When membrane is in resting condition, it is only permeable to potassium ions and nearly impermeable…

Q: Select one: a. increased amount of ATP b. movement of chlorine down its concentration gradient c.…

A: Introduction  Information is transmitted via neurons. They communicate between various brain regions…

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: Action potential conduction velocity is more rapid in a myelinated axon than an unmyelinated one…

A: The myelinated and unmyelinated nerve fibers are the two types of nerve fibers.  Myelin is a fatty…

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: In a resting neuron, which of the forces listed below will act to push sodium (Na+) ions into the…

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

Q: What happens to the sodium when the sodium channels open?

A: Sodium channels are basic film proteins that structure particle channels, directing sodium…

Q: When the action potential begins, Na+ gates open, allowing Na+ to cross the membrane. The charge…

A: Membranes potential can be defined as the change in electric potential due to changes in the amount…

Q: At rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron…

A: The nervous system is highly complex among different organ systems in animals. By transmitting…

Q: When an action potential arrives in an axon terminal, synaptic vesicles containing acetylcholine are…

A: Acetylcholine is the main neurotransmitter of the nervous system. It is associated with many…

Q: Which of the following situations correctly illustrates the all-or-none principle? Select one: a. A…

A: The magnitude of the action potential in any nerve fiber is independent of the strength of the…

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: The membrane of a neuron is composed of __________ with __________ embedded in them.     a.…

A: The membrane of a neuron is composed of lipids with  proteins embedded in them. The cell membrane of…

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: There is a type of toxin found in the liver of the puffer fish that prevents the opening of…

A: Introduction  The neurotoxin tetrodotoxin (TTX) is highly toxic. Its name is derived from the group…

Q: What is myelin? A. Projection on a neuron cell body that is sensitive to stimuli B. Another name…

A: The complex organ system present in the human body that functions in organizing all metabolic…

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: nsulate parts of the neuron axon but not the cell ba are fatty menmbranes. are formed by glial…

A: Myelin sheaths are fatty tissue coverings that protect nerve cells. These cells are part of your…

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: Which one of the following statements about gap junctions or electrical synapses is incorrect? A.…

A: Electrical coupling is the transfer of coordinated action potentials from one cell to the next via…

Q: of the following is true of axons?

A: Axons are the distal part of the neuron. There are two types of axons. The myelinated nerve fibres…

Q: In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane…

A: The nerve tissue is made up of many nerve cells called as neurons. These neurons are the structural…

Q: Which of the following is true about the conduction of action potentials?

A: Generation of Action potential occurs in the axon. The action potential is generated due to opening…

Q: Neurotransmitters must pass from an axon terminal to the next dendrite by crossing a fluid-filled…

A: Neurons facilitate communication in the brain. A neuron is made up of dendrites (receives…

Q: During an EPSP, the _____ gates in the membrane open. During an IPSP, the _____ gates open. a.…

A: The nervous system comprises of organs made up of neurons (nerve cells). The nervous system is…

Q: Which of the following is not a structural component of a chemical synapse? A. Presynaptic Knob B.…

A: The synapse is the junction where two neurons communicate with each other. The message is sent from…