The transmission of action potentials down a myelinated axon is faster but "saltatory" because of which of the following?   A. the passive transmission of action potentials is faster but degrades the action potential   B. voltage-gated sodium channels are only found in the Nodes of Ranvier   C. active transmission of action potentials does not degrade the action potential but is slow   D. A and C are correct   E. all of the above are correct

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: After the action potential reaches its peak, the potential across the membrane falls toward its…

A: The action potential is defined as the electrical signaling, which occurs in the neuronal cells, due…

Q: A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then…

A: Plasma membrane always try to maintain potential difference between the sides of the extracellular…

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: Suppose axon A enters a ganglion (cluster of neurons) and axon B leaves on the other side. Shortly…

A: A ganglion is a group of neuron cell bodies in the peripheral nervous system of the Human Nervous…

Q: Choose the item in column 2 that best matches each item in column 1…

A: The nervous system of our body is concerned with the functions of sensory reception, processing, and…

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: 1.2 Reducing extracellular [Na+] in the solution surrounding a squid giant axon would be expected to…

A: Squid giant axon - It is very large, it's function is, in squids it control part of water jet…

Q: what happens when an antagonist binds to an inhibitory neurotransmitter receptor? a) it would…

A: When an antagonist binds to an inhibitory neurotransmitter receptor it would decrease inhibitory…

Q: Which of the following would increase the speed of a nerve impulse along an axon?A. Decreasing the…

A: The Speed of conduction of nerve impulses is increase by the presence of a myelin sheath . The…

Q: I. These forms the specialized junctions called synapse. A. Cell body B. Glial cells C. Synaptic…

A: Introduction :- The point of transmission of electric nerve impulses between two nerve cells…

Q: А X Information given: An EPSP from neuron A causes a 10 mV change (from RMP); an IPSP from neuron B…

A: A stimulus is generated due to the sudden environmental changes which can excite a nerve or an…

Q: At maximal stimulation, much above threshold, how long will it be until an axon fires the next AP?…

A: The action potential is defined as the quick variation in the membrane potential that occurs when a…

Q: Most human axons have a myelin sheath that_____ . a. prevents action potentials from moving backward…

A: The complex body of human being functions in a systemic and coordinated way, and this…

Q: Calcium ions a)Help control the membrane threshold voltage. b)Reduce axon permeability to Na+.…

A: sensory input-afferent information travels from the outside environment to brain environment.

Q: An action potential at a given stretch of a neuron's axon does not re-stimulate the neighboring…

A: Action potential It is defined as the rapid rise and subsequent fall in membrane potential across a…

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

A:

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: Which of the following statements is TRUE of the action potential?

A: Sodium –potassium pump is one of the major biochemical pathways leading to critical physiological…

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: 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: Given what you already know about the sensation of pain, what is the expected change in membrane…

A: The mechanism of pain involves three events;—transduction, transmission and modulation Transduction…

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: 1) What is responsible for returning the cell to its normal resting membrane potential following the…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: How do neurotransmitters directly affect the postsynaptic neuron? A)They cause a change in the…

A:

Q: In SA nodal cells the upstroke of the action potential: A)is characterized by a substantial…

A: The sino atrial node is the pacemaker of the heart. The cells of the sea node have a particular…

Q: When an action potential happens: OA Sodium rushes into the cell in the first stage creating…

A: A nerve cell is a specialized cell for the communication to transmit information between neuron…

Q: a. ng the charge of a neuron b. Changing the polarity of a neural membrane c. Initiating the…

A: A nerve impulse is the way nerves communicate with one another, these are usually the electrical…

Q: During a relative refractory period of an action potential   A. Another action potential can be…

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

Q: 1. Action potentials are generated in a region called the _______ which includes the axon hillock…

A: Action potentials are generated in a region called the initial segment  which includes the axon…

Q: The presynaptic portion of a neuron marked A is most likely: a) An excitatory axon b) An inhibitory…

A: An excitatory synapse is a synapse in which an action potential in a presynaptic neuron increases…

Q: The equilibrium potential for K* in neurons is ordinarily nearest- A. the equilibrium potential for…

A: The correct option is B - resting potential

Q: The made-up drug leakyhose degrades myelin resulting in myelin becoming more porous and therefore a…

A: The longest cell in the human body is called the neuron or nerve cell. This cell transmits the…

Q: If your index finger had to be amputated as a result of a freak what would happen to your S1…

A: Introduction S1 somatotopic maps refers to spatial patterns within the functional organization of…

Q: ing of potassium (K+) channels on dendrites of a postsynaptic neuron will have what effect?  A)…

A: Opening and closing of ion channels on the membrane leads to the Hyperpolarisation and…

Q: a) How does a CAP differ from a single action potential? b) Action potentials are said to be all or…

A: a*A compound action potential (CAP) is a signal from a nerve trunk which is made of  numerous axons.…

Q: Post-synaptic acetylcholine receptors are blocked by   A.Calcium ions B.Atropine  C.Nerve gases…

A: Acetylcholine is the chief neurotransmitter of the parasympathetic nervous system that controls the…

Q: Which statement is true? Select one: a. All axons, dendrites, and cell bodies are myelinated b. Some…

A: Neurons are called as the structural and functional unit of the nervous system as they receive and…

Q: Which of the following statements about the intensity of a nerve response is true? Select one: a. A…

A: Third, the frequency of action potentials is used by nerve cells to code the strength of…

Q: During saltatory conduction, action potentials are generated: a. along the entire length of the…

A: A neuron is the functional unit of the nervous system. Neurons are excitable cells that transmit…

Q: Let’s examine a neural pathway that involved three (3) neurons in sequence: one propagates an action…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

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.