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: Transmission of the nerve signal across a synapse is accomplishedby thea. movement of Na+ and K+.b.…

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

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: A neuron with a resting membrane potential of -75 mV receives multiple inputs giving rise to the…

A: The action potential is a condition of a nerve impulse or electrical activity when there is a…

Q: When a neuron is stimulated, sodium moves into the cell, causing the inside of the neuron to…

A: Neurons are the functional and structural units of the nervous system. These cells are capable of…

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

A: Neuron:

Q: A perturbation that alters the membrane potential at a site on a neuronal axon will pass to…

A: Ion transport through ion gated channels is an example of passive transport because energy is not…

Q: Action potentials are normally initiated at the axon hillock because a. there is a particularly high…

A: When the membrane potential of a given cell location rapidly rises and falls, an action potential…

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: What guarantees that there are unidirectional action potentials? Choice A threshold  B.…

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

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: synapse includes:   a. a very narrow synaptic cleft   b. a presynaptic neuron with…

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

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: Suppose that gated ion channels for Na+or Ca2+ opened in the plasma membrane of a muscle cell.The…

A: The correct option is (d) All of these.

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: 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: 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: ne: hey insulate portsi of the neuron axon but not the cell body and dendrites. ney increase the…

A: Myelin sheath  is the covering around the nerve cells. It is very important as various diseases may…

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: 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: Which of the following is/are found only in the PNS? a. Nerves b. Astrocytes с. Мyelin d. Lipofuscin…

A: Peripheral nervous system comprises all the nervous tissue outside the central nervous system. There…

Q: Neurotransmitters are released from neurons due to the opening of ____________. Select one: a.…

A: Neuron is the sub unit of nervous system. It helps in coordinating the different body parts via…

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 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: A local potential will only lead to an action potential if is reached O a. depolarization b. resting…

A: A sudden, rapid, transitory, and spreading change of resting membrane potential is an action…

Q: An inhibitory presynaptic neuron can affect a postsynaptic neuron bya. producing an IPSP in the…

A: The communication of neurons with one another occurs at the site of the synapse, where two nerve…

Q: Which of these terms is correctly matched with its definition ordescription?a. depolarization:…

A: The cell membrane has a membrane potential associated with it. The electric potential outside the…

Q: The rate of information transmission from the central nervous system (CNS) to an effector organ will…

A: Nerve impulses or action potentials are electrical signals that travel along the length of a neuron.…

Q: Which of the following statements relating to depolarization is incorrect? a. it is a reduction in…

A: The central nervous system consists of numerous specialized cells called neurons. The neurons are…

Q: When summation of multiple graded synaptic potentials occurs which of the following would…

A: Post synaptic potentials or PSPs are called excitatory (or EPSPs) in case they increase the…

Q: On the graph above, when do the sodium ion channels close? Select one: a. between 0.2 ms and 0.5 ms,…

A: When the stimulus is provided, the Sodium ion VGIC's (Voltage-gated ion channel) move from resting…

Q: Excitatory postsynaptic (EPSP'S) the resting membrane potentials A. have little or no effect b…

A: A current generated in our body in the membranes of the neuron cells. It is due to voltage…

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: 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: 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: O Which of the following is (are) true about the myelin sheath? O a. made of Schwann cells O b.…

A: Oligodendrocytes in the CNS shield the axons of neurons. When an oligodendrocyte mechanism coils…

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: An excitatory postsynaptic potential   a. is only one of several types of graded potential.   b.…

A: Preynaptic cell is the cell or a neuron from where the signal is passed on to the synapse to 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.