What is the point A on the graph? Define this term. B) What ions are moving at B on the graph, what direction are they moving and what type of channel is it? C) What ions are moving at C on the graph, what direction are they moving and what type of channel is it? D) If we used a chemical on the nerve at point B that prevented the channels for C from opening what would happen to the action potential?

Q: c) Draw a diagram indicating how the ion concentrations will change during the repolarization phase…

A: All cells generate an electrical potential known as membrane potential across the plasma membrane.…

Q: b) Draw a diagram indicating how the ion concentrations will change during the depolarization phase…

A: During the generation of a nerve impulse the neuronal cells send an action potential to the next…

Q: List four ways in which an action potential is different from a local potential.

A: SOME BASIC INFORMATION ABOUT A NEURON  NEURON   It is the longest cell inside the human body. It is…

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: Label the structures in the following diagram of a neuron. (a) ______________ (b) ______________(c)…

A: The neuron is the building block or fundamental unit of the nervous system. It is a relay system of…

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

A: The neurons have the capability of generating and transmitting nerve impulses throughout the body.…

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: You are recording the resting membrane potential from a neuron placed in a petri dish. The following…

A: The correct answer to this question is option C i.e. increase concentration of K+.

Q: What kind of graded potential describes a change in membrane potential from  70 to  60 mV? From  70…

A: The membrane potential is the difference between the two electric potentials the interior and the…

Q: myelination of an axon is decreases the speed of actio potential. a) true  b) false

A: The myelinated axon can be compared to an electrical wire (the axon) with protecting material…

Q: saltatory conduction.

A: Saltatory conduction occurs widely in the myelinated nerve fibers of vertebrates. It involves the…

Q: Multiple axons in the peripheral nervous system bundled together by layers of connective tissue form…

A: The nervous system is like the central control unit of the body and controls and responds to stimuli…

Q: Which statement is true regarding the neuron synapse? A) the preganglion and post ganglionic Neurons…

A: The cells of nervous system are called neurons. They have 3 distinct parts, including the body of…

Q: You generate action potentials in a neuron bathed in solution in a petri dish by applying a…

A: An action potential is a rapid sequence of changes in the voltage across a membrane. This action…

Q: 2) Draw a typical neuron and the relative ion concentrations (high or low) for Na+ and K+ inside and…

A: Neurons are specialized cells responsible for transmitting information throughout the nervous…

Q: A new drug is developed that prevents the demyelination occurring in the progress of multiple…

A: The objective of the question is to identify the type of cell in the central nervous system that is…

Q: When a neuron is polarized, O a) both positive and negative ions are concentrated inside the neural…

A: The word polarized means that there is a charge difference which is responsible for the occurrence…

Q: If extracellular [Na1] is elevated, how would the resting potential and action potential of a neuron…

A: The nervous framework is a profoundly intricate piece of a creature that facilitates its actions and…

Q: he neuron labelled "D" in the figure is what class of functional neuron?: 3rd-order? lower motor…

A: The neuron is the structural and functional unit of the nervous system. Neuron helps in the…

Q: In the introduction section the authors wrote “In general, the polarity-dependent mechanisms are…

A: Anodal stimulation is a type of electrical stimulation that involves passing a positive electric…

Q: The concentration of ions in the chemical environment surrounding the neurons must be tightly…

A: Neurons are the basic structural unit of the nervous system. The concentration around neurons has to…

Q: Ethosuximide is a drug used to treat epilepsy, particularly absence seizures. It blocks ion channels…

A: Ethosuximide is the drug that is used to control the seizure. It helps to control the absence of…

Q: After the depolarisation phase of an action potential, the resting potential is restored by ______.

A: Introduction An action potential is defined as a sudden fall or rise in the potential of the…

Q: Is an action potential transmitted faster between cells connected by anelectrical synapse or by a…

A: In neurophysiology, the term action potential is used to describe the electrical form of messages…

Q: What is a typical speed of action potential propagation in the absence of myelination?  (Not the…

A: Brain cells called neurons send data and guidelines all through the cerebrum and body. The data is…

Q: 13) Draw a graph representing the changes in membrane potential across the axonal membrane before,…

A: The electric signals that flow down the dendrites to form a nerve impulse or an action potential are…

Q: During extreme dehydration, plasma K* can increase to as high as 10 mM. (A) What would the membrane…

A: Introduction  When you use or lose more fluid than you consume, your body becomes dehydrated because…

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: Why is the propagation of action potential unidirectional

A: An action potential is a fast ascent and  fall in voltage or membrane potential across a cell…

Q: Name four types of glial cells in the Central Nervous System, and list a function for ea of these…

A: Glial cells, consisting of microglia, astrocytes, and oligodendrocyte lineage cells as their major…

Q: Depolarization of a neuron plasma membrane will shift the membrane potential toward (a) 0 mV. (b)…

A: The resting potential of neurons is -70 millivolts meaning that the cell’s interior is comparatively…

Q: Name the point of contact between two neurons.

A: Neurons are termed as the basic unit of the brain, they transmit information to other nerves cells,…

Q: A) Bare area of a myelinated axon B) Can propagate without changing its magnitude C) Type of axon…

A: Since we have been instructed to answer only the first three subparts in a question, please post…

Q: The all-or-none principle, associated with the action potential, states that once membrane potential…

A: Neurons transport electrical signals through the action potential. Due to the movement of some ions…

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…

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.