"The local anesthetic, novacaine, used by most dentists blocks voltage-gated Na+ channels. Why would it result in numbness (loss of feeling)?" It prevents action potentials from occurring It prevents local potentials from occurring It prevents the membrane potential from returning to normal It prevents exocytosis of neurotransmitter O O

Q: ou studied how neurotransmitter act and their use in medicine. Based on the information answer how…

A: Tetrahydrocannabinol (THC) is a psychoactive substance commonly called marijuana.

Q: This patient's hypokalemia was due to his profuse sweating the previous day and the subsequent loss…

A: Potassium is a mineral, our body cells need this, it regulates our major body parts functions such…

Q: Chemical synapses in the nervous system :-a- allow diffusion of chemical substances form the…

A: An action potential when reaches the terminus of an axon it is transmitted from one another through…

Q: Which of the following would you predict would happen if you limited the amount of ATP to a neuron…

A: We have Na+/K+ ATPase channel that uses ATP to translocate 3 Na+ outside and 2 K+ outside which…

Q: You are recording the electrical activity of a cell body with a resting membrane potential of -70…

A: Given; Resting membrane potential of the cell= -70mV No. of stimuli detected by the cell= 3 from…

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: Which phase in the generation of action potential is represented by N? +30 M N K -55 -70 Time…

A: Whenever a neuron is triggered by a stimulus, it experiences a brief shift in electrical potential…

Q: Repolarization of an axon during an action potential is produced by a. inward diffusion of Na+. b.…

A: A stage of action potential in which the cell undergoes a decrease in voltage, is known as…

Q: receptors have their neurotransmitter binding site and ion channel are components of different…

A: Answer 1: the receptors have their neurotransmitters binding site and ion channels are components of…

Q: oltage-gated channels open only when the membrane potential depolarizes at least up to a O threshold…

A: The action potential travels down the axon as voltage-gated ion channels are opened by the spreading…

Q: An action potential is shown below. Number 4 on the graph is showing which phase? 3 Membrane…

A: Action potential is a brief reversal of membrane potential where the membrane potential changes from…

Q: postsynaptic potential (EPSP) in it. O D. bind to neurotransmitter receptors on the postsynaptic…

A: Synapse is the area of the junction between the two Nerve cells in which the first nerve cell from…

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: Suppose you placed an isolated neuron in a solution similar toextracellular fluid and later…

A: A neuron's resting membrane potential is around -70 mV (mV = millivolt)thismeans the neuron's inside…

Q: Excitatory neurons A and B both synapse with neuron C. Neuron A releasesa neurotransmitter, and…

A: The junction between two neurons is known as a synapse and when a neuron reaches its action…

Q: Which two ideas about ion channels of a neuron at its resting potential are true? O ion channels are…

A: The movement of ions across the plasma membrane is responsible for maintaining the resting potential…

Q: True or False a. When they are at rest, neurons are more positively charged inside than outside the…

A:

Q: Would it be possible to generate a single action potential immediately after adding a chemical that…

A: Sodium potassium pump is major electrogenic pump in animal. It carry out 3 sodium outside the cell…

Q: Depolarization is: ) Is the 2nd step of an action potential O Is the last step of an action…

A: Depolarization is defined as a transition in a cell that occurs when the cell's electric charge…

Q: The postsynaptic potential produced in a neuron will be excitatory or inhibitory depending on the…

A: First let us understand the term Postsynaptic Potential. When a nerve impulse is transmitted…

Q: Which of the following best describes saltatory conduction? A process in myelinated axons where the…

A: In contrast to the slow continuous process of depression extending down an unmyelinated axon,…

Q: Which one of the following statements about the propagation of the action potential is incorrect? O…

A: The action potential is any shift in the membrane potential due to an increase or decrease of…

Q: What do graded and action potentials have in common? O Both cover great distances. O Both may be…

A: The membrane potential is a term used to describe the difference between the electric potential of…

Q: During an IPSP, the postsynaptic membrane becomes more permeable to GABA. O Ca2+. Na+. O K+.…

A: The IPSP stands for Inhibitory postsynaptic potential. It occurs when ion channels open resulting in…

Q: If a neurotransmitter binds to a receptor that opens potassium channels, the result is ... Group of…

A: Postsynaptic potentials refer to the alteration in the postsynaptic terminal’s membrane potential of…

Q: Of the following, which must be true for an action potential? I - Action potentials only occur when…

A: The action potential is a potential that is fired when the voltage-gated sodium ion channels open.…

Q: Sodium (Na*) and Potassium (K+) are equally distributed across the neuronal membrane at resting…

A: BASIC INFORMATION   NEURON   It is the longest cell inside the human body  It is found in the brain…

Q: Potassium leak is a major determinant of resting membrane potential. What happens to the resting…

A: Answer- Option b. The resting memberane potential becomes more negative.

Q: Depolarization is: O Is the last step of an action potential O A reduction in the electrochemical…

A: The action potential is the short-term change in the electric potential on the cell’s surface in…

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: he source of some infant seizures lies in a mutation of a particular type of voltage-gated Na+…

A: Voltage gated Ion channels are present in the membrane and these open and close according to the…

Q: Neurons have an electrical charge across their membranes called the resting potential when they are…

A: Answer : Neurons have an electrical charge across their membranes called the resting potential when…

Q: Neurons have an electrical charge across their membranes called the resting potential when they are…

A: The nerve system and the hormonal system work together to regulate and coordinate the human body.…

Q: A drug is called an agonist if it ________.a. blocks a receptorb. interferes with neurotransmitter…

A: Drugs can be either antagonists or agonists. Antagonist drugs are those exogenous components, which…

Q: 2. Tetrodotoxin, a toxin found in puffer fish, acts by inhibiting voltage-gated sodium channels.…

A: In the animal cell, the plasma membrane expresses different types of ion channels and pumps that…

Q: Which statement is true regarding chemical neurotransmission? O An IPSP closer to the soma will…

A: The cells of the nervous system have a significant functionality i.e. Communication. At the neuronal…

Q: What would happen to action potentials in the brain if a drug blocking ATP were immediately…

A: The Na+-K+ pump moves two potassium ions inside the cell in exchange for three sodium ions by using…

Q: Which of the following statements is correct with regard to ionic concentrations at the normal…

A: Resting potential is the stage when a neuron is not actively signaled. A neuron that is at resting…

Q: Şubthreshold potentials can produce action potentials through it can't occur spatial summation…

A: An action potential is produced in a neuron through stimulation. This produces a nerve impulse that…

Q: Fill in the blank:  An action potential is a rapid sequence of changes involving…

A: Action potential (AP) is the mode through which a neuron transports electrical signals. It is…

Q: Compare and contrast the events that occur at a neuromuscular junction (NMJ) and a neuron-neuron…

A: A chemical synapse is a point where two nerve cells or a neuron and a muscle cell meet. A…

Q: Why does an action potential flow in only one direction? because voltage-gated sodium channels…

A: Neurons or nerve cells are the fundamental units of the nervous system. They are electrically…

Q: B A EPSP EPSP IPSP Y Axon - hillock Axon- Will it be likely to produce an action potential in neuron…

A: As per bartleby guidelines we are suppose to answer only 3 subparts of a particular question please…

Q: A post-synaptic cell receives a signal that causes it to hyperpolarize. Which statement is NOT true…

A: Action potentials are nerve messages. Neurons produce and convey these signals through their…

Q: . Neurons use vast amounts of energy to maintain the [Select ] a. ["polarization", b."resting…

A: The basic functional unit of the nervous system is neurons, It is a specialized cell that conducts…

Q: The resting voltage of the cell membrane: O is a property of the cell O is generated by…

A: Cell membrane It refers to the biological membrane that is involved in the separation of the inside…

Q: Many neurotransmitters trigger depolarisation by binding their receptors and gating an ion channel…

A: Answer: Neurons are like electrical devices, having many channels sitting in the cell membrane(the…

Q: If a biologist wished to cause a depolarization event in a neuron, what action would achieve this…

A: An action potential (AP) appears when the membrane potential of a particular cell location rapidly…

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.