Assume a length of axon membrane of about 0.10 m is excited by an action potential...

Assume a length of axon membrane of about 0.10 m is excited by an action potential (length excited = nerve speed

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genius_generous answered 6 months ago

Define resting membrane potential and action potential (1 point). Why is the resting membrane potential negative...

Define resting membrane potential and action potential (1 point). Why is the resting membrane potential negative and close to the K+ equilibrium potential when cells are at rest, and then positive and closer to the equilibrium potential of Na+ when activated (4 points).

There are two properties that affect the conduction speed of an action potential along an axon

There are two properties that affect the conduction speed of an action potential along an axon: the axon's diameter and whether or not the axon is myelinated. Rank the axons from slowest to fastest conduction speed. If two axons have the same conduction speed, place one on top of the other.

At the peak of an action potential, the membrane potential of a human motor neuron reaches...

At the peak of an action potential, the membrane potential of a human motor neuron reaches about +30mV. What value for “alpha”, the ratio of PNa/PK, allows this to occur. Use an online calculator/simulation to find a value for alpha that approximates what happens to reach this membrane potential, and write out the entire GHK equation (the version with just sodium and potassium) that can produce this membrane potential, including normal ion concentrations and temperature.

Describe how an action potential is propagated through an axon, and how neurotransmitters are released in...

Describe how an action potential is propagated through an axon, and how neurotransmitters are released in response to the action potential reaching the synaptic terminal

Why does the action potential spread in only one direction (toward the axon terminal)?

Explain how an action potential when fired spreads to the rest of the axon.Why does the action potential spread in only one direction (toward the axon terminal)?Explain why action potentials are conducted more quickly and effectively (in terms of energy used) in myelinated cells than in unmyelinated cells.

Describe how an action potential is generated across the axon. Make sure to explain the role...

Describe how an action potential is generated across the axon. Make sure to explain the role of Na+ and K+ channels and pump in this process.

Describe how an action potential propagates along a myelinated and an unmyelinated axon, including how the...

Describe how an action potential propagates along a myelinated and an unmyelinated axon, including how the potential is spread along the membrane. How are these two processes similar and how are they different? What two benefits do myelinated axons have over unmyelinated ones? Provide one way in which a myelinated axon is similar to an electrical wire and one way in which an axon is different than a wire. Why does multiple sclerosis (MS) prevent transmission in myelinated axons (that...

When an electrode is stuck inside an intact squid giant axon, the membrane potential registers -70mV....

When an electrode is stuck inside an intact squid giant axon, the membrane potential registers -70mV. When the axon, suspended in a bath of seawater, is stimulated to conduct an impulse, the membrane potential changes transiently to +40mV. For univalent ions at 20oC, the Nernst equation reduces to: V(membrane potential) = 58mV x log10(Co/Ci) Where Co and Ci are the extra and intracellular concentrations of the ion respectively (see table below). Ion [cytoplasm] [seawater] Na+ 65mM 430mM K+ 344mM 9mM...

How does an action potential move in only one direction down an axon? discuss the three...

How does an action potential move in only one direction down an axon? discuss the three conformations or voltage gated sodium channels in the answer.

Describe the events that take place when the action potential spreads throughout the axon terminal leading...

Describe the events that take place when the action potential spreads throughout the axon terminal leading up to the release of neurotransmitters into the synaptic cleft.

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