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When a sodium channel opens and sodium rushes into a myocyte the cell membrane becomes?
depolarized, which triggers an action potential and leads to muscle contraction.
Which is true of drugs that decrease membrane permeability to sodium ions?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
What suddenly changes Earth's crust?
Earth's crust can suddenly change due to natural events like earthquakes, volcanic eruptions, landslides, or meteorite impacts. These events can cause rapid movements and deformations in the Earth's crust, leading to sudden changes in topography and landforms.
Why is an underground lake an aquifer?
An underground lake becomes an aquifer when it is a permeable layer of rock or sediment that holds and transmits groundwater. Aquifers can store and supply large quantities of water to wells and springs.
In the process of elastic rebound as a rock becomes stressed it first?
In the process of elastic rebound, as a rock becomes stressed it first deforms elastically, storing energy in the form of strain in the rock. Once the stress exceeds the rock's strength, it suddenly breaks and releases the stored elastic energy, causing an earthquake. This sudden release of energy results in the rock snapping back to its original shape, causing the ground to shake.
When a nerve is activated by a threshold stimulus the membrane becomes more permeable to?
Potassium and Sodium
What would happen to the membrane potential if a substance that makes the membrane permeable to ions is added to the cell?
If a subsance is applied to a cell that makes the membrane more permeable to ions, the interior voltage changes. If the interior voltage becomes more positive (say from Ð70 mV to Ð60 mV), this is called a depolarization. If the interior voltage becomes more negative (say from Ð70 mV to Ð80 mV) it's called a hyperpolarization.
What is the effect of heat on beetroot?
Heat causes the cell membrane of beetroot cells to become more permeable, leading to the release of red pigment (betacyanin) into the surrounding environment. This results in the characteristic color change of beetroot from red to a lighter pink or yellow when heated.
Is the cell membrane permeable to ethanol?
Ethanol is a type of alcohol and alcohol breaks apart the weak hydrogen bonds in the lipid bilayers of cell membranes, which in turn, means it's denaturing. Once a membrane denatures, it no longer has a function so it becomes more permeable and it's less selective.
What would happen if the cell wasn't permeable?
the cell membrane is not completely permeable.This allows substances in and out of the cell and only a few substances could get into the cell.If the cell membrane becomes permeable any substance including the bad ones will get in easily this could destroy the cell.
What does the term reversal of fortune mean?
It referrers to when a poor person suddenly becomes rich; or a rich person suddenly becomes poor.
What is the meaning of apere?
Suddenly becomes visible. Appear.
WOULD A SUBSTANCE THAT DECREASES MEMBRANE PROBABILITY TO SODIUM INCREASE OR DECREASE THE PROBABILITY OF GENERATING A NERVE IMPULSE?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
What disorder occurs in juvenile arthritis?
the synovial membrane becomes intensely inflamed. Usually thin and delicate, the synovium becomes thick and stiff, with numerous infoldings on its surface. The membrane becomes invaded by white blood cells
If a resting potential becomes more negative what happens to the cell?
When the membrane potential becomes more negative it is being hyperpolarized. Remember the resting membrane potential is already at a negative state (~70mV). So if you are making a comparison of a membrane potential that is hyperpolarized in comparison to a resting membrane potential, the resting membrane potential is said to be more depolarized.When the membrane potential becomes more positive it is called depolarization.
Honda accord steering becomes hell hard and eps light is on?
suddenly becomes very light on a wet road
A small deviation from the resting membrane potential that makes the membrane more or less polarized?
This small deviation is called a graded potential. It can be either a depolarization, where the membrane becomes less polarized, or a hyperpolarization, where the membrane becomes more polarized. Graded potentials are important for transmitting signals over short distances in the nervous system.
