What guarantees that there are unidirectional action potential? A. threshold B. depolarization refractory period  C. absolute refractory period D. relative refractory period

Q: Explain how axon diameter and myelination affect conduction velocity.?

A: Axon is a slender long projection of a neuron or nerve cell. It conducts the electrical impulses…

Q: Although one pinch did not cause a dog to flex its leg, several simultaneous pinches at nearby…

A: The brain is the organ that is Central to the nervous system. The nerves throughout our body carries…

Q: What event triggers an action potential?a. Opening of sodium channelsb. Opening of delayed potassium…

A: 1- Opening of delayed potassium channels 3-High concentration of negative ions outside the cell.…

Q: any choice: What would happen if there were an inactivating mutation in voltage-gated sodium…

A: Pain is a serious medical problem. Pain sensations typically originate in peripheral neurons known…

Q: The Na+/K+ ATPase pump is a. not required for action potential firing. b. important for…

A: Introduction  Chloride is the most abundant anion in the extracellular fluid. Along with Chloride…

Q: For a second action potential to be fired an ......threshold must be reached......... the absolute…

A: An “action potential” occurs when the neuron is sending down an axon. It is an “explosion of…

Q: Where does saltatory conduction occur? Select one: a. From node to node in unmyelinated fibers b.…

A: saltatory conduction in normal term means propagation/movement of action potential from one node of…

Q: increases the probability of producing an action potential, where a ________ decreases the…

A: Depolarization increases the probability of producing an action potential, where a hyperpolarization…

Q: Transmission of the nerve impulse across a synapse isaccomplished bya. the release of Na+ at the…

A: Introduction  Neuron/Nerve: A neuron is a single nerve cell which consists of central cell body,…

Q: A change in the voltage across a neuron’s plasma membranethat makes the neuron less likely to fire…

A: The neuron is the structural and functional unit of the nervous system. The neuron is also known as…

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: A subthreshold stimulusa. produces an afterpotential.b. produces a graded potential.c. causes an…

A: A neuron sends information down their axon to another neuron or other cells and communicates with a…

Q: The difference in charges across the plasma membrane of anunstimulated neuron is calleda. an EPSP.b.…

A: A neuron refers to the structural and functional unit of the nervous system which is involved in the…

Q: What is the conduction velocity of the action potentil in a myelinated axon of the nerve cell?

A: The conduction velocity is the speed in which electrochemical impulse propagates down a neural…

Q: Motor neurons and interneurons are neurons.a. pseudo-unipolar c. multipolarb. bipolar d. afferent

A: Since neurons relay signals between the brain and tissues and regulate their movement or behavior,…

Q: 32) In order for a nerve impulse to be transmitted across a synapse, a neurotransmitter must be…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Explain the propagation of an action potential. 1. Start with a stimulus 2. Follow through two…

A: An action potential is a brief electrical signal that is transmitted along the membrane of a neuron…

Q: Posttetanic potentiation of a synapse increases the amount of in the axonterminal.a.…

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

Q: During the Refractory period of the action potential, the neuron will: Select one: O a. Not respond…

A: Nerve cells or neurons are excitable cells of nervous system. A typical neuron consists of cell body…

Q: Explain the difference between the relative and absolute refractory periods. Briefly describe the…

A: A voluntary muscle fibre contracts when threshold stimulus (optimum stimulus that could generate a…

Q: Which of the following is the plateau stage of the action potential? A. Phase 0 B. Phase 1 C. Phase…

A: The heart is an excitable organ which can spontaneously generate action potentials. There are three…

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: At an electrical synapse, presynaptic and postsynapticmembranes interface througha. neurofibril…

A: Gap junctions

Q: Which of the following changes to an action potential indicates a larger stimulus?  a. Increased…

A: Action potential takes place when the membrane potential of a particular cell location increase and…

Q: A synapse is:   a. a gap between neurons   b. crossed by a chemical   c. separates the axon end…

A: the microscopic gap present between terminal end of axon of one neurone and dendron or axon or cell…

Q: why schwann cells affect the speed of an action potential?

A: Schwann cells is defined as the glial cells that are either myelinated or non-myelinated and aids in…

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 part of a neuron is responsible for receiving information? a. Axon. b. Node of Ranvier. c.…

A: The nervous tissue is made up of basic units of electrically excitable cells called neurons. The…

Q: A synapse with all of these; a postsynaptic dendrite, an astrocyte end foot, and the presynaptic…

A: Introduction :- Synapses are part of the circuit that connects sensory organs in the peripheral…

Q: What is the correct statement about the myelin sheath?   a It is produced by ependymal cells.   b…

A: Nerve is the part of nervous system. The nerve transmits the impulse from brain to body parts or…

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: What effect would a WEAKER stimulus have on C?  a. Greater amplitude (height) b. Lower amplitude c.…

A: This graph represents rhat the action potential of nerves. The potential changes during the…

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: 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: Summationa. is caused by combining two or more graded potentials.b. occurs at the trigger zone of…

A: The action potential is the temporary shifts in the potential of the neuronal membrane which results…

Q: Which best defines depolarization?   A. At first polarity is reversed the continues until the…

A: Polarization is the existence of opposite electrical charges on either side of a cell membrane.…

Q: Where can the Nodes of Ranvier be found? Select one: a. The dendrites of the myelinated neurons. b.…

A: Introduction: Nodes of Ranvier are about 1 micrometer wide and they expose membrane of the nerve…

Q: What does a mechanically gated channel respond to?a. physical stimulusb. chemical stimulusc.…

A: Cell is the smallest structural and, functional unit of life. It is simple machinery that houses all…

Q: Action potentials are conducted more rapidlya. in small-diameter axons than in large-diameter…

A: Under the resting conditions, a neuron has a specific resting potential of -70 mV. This negative…

Q: This tubular structure exiting the neuron transmits information from one neuron to the next neuron.…

A: Neurons are the cells of the nervous system that are responsible for the generation and conduction…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.