Answer:
Explanation:
Action potential
It is the potential or power or electrical energy required to generate impulses and provides communication between the neurons is called action potential. Normally cell membrane consists of potential is called resting membrane potential() -70mV. The action potential is due to exchange of different ions across the membrane.
Phases of the action potential in a neuron are
i. Depolarization- it is caused by the influx of sodium and calcium ions through the opening of voltage-gated sodium and calcium channels. sodium ion influx is rapid than the calcium ions membrane potential -70mV to +30mV.
ii. Repolarization - It causes the efflux of potassium ions into the cell through the opening of potassium channels. the membrane returning to resting membrane potential.
iii. After- Hyper polarization - in this stage the potassium channels remain open and causes re polarization and comes to normal membrane potential.
The generation of impulses(depolarization) in neuron mainly depends on influx sodium and calcium ions without these ions, no action potential developed and neuron firing does not occur.
If the drugs inhibit these channels, no depolarization, no action potential, no neuronal firing or communication.
The channels involved in an action potential are voltage-gated sodium channels, potassium channels, and calcium channels.
The action potential is required for transmission of information one are to another area in the body.
The responses to different stimuli is due to action potential.
Alexander Hamilton was very concerned about what might occur if the
Constitution wasn’t adopted. He had seen firsthand the difficulties this
country faced with the weak plan of government created by the Articles
of Confederation. He worried that our financial issues would make it
difficult for us to succeed as a country. He worried about our
government being able to keep order at home. He feared we would continue
to be viewed as a weak..
Answer:
This is not true Muhammad did not travel when he was young man
He was a child when he was moving around with his relatives caravans
He worked as a caravan trader with his family.
Explanation:
He worked as a caravan trader with his family.
is the
correct answer
Answer:
the ability to travel off the plantation
Explanation:
its the only one that makes sense
Answer:
The correct answer is -
1. Europe
2. Africa
3. Europe
4. 1900 to 1990
Explanation:
In the given question it is shown in the table Region of Birth of Foreign-Born Population of the U. S. from Europe, Asia, Africa, and, Latin America and on the given data the answer of the question asked is as follows:
1. Europe is the region from the largest population of immigrants come to the United State in the year 1990 with 8,881,548
2. Africa is the region that shows the biggest increase from 1930 to 1990 with 18,326 to 363,819.
3. Europe has an immigrant population of from was about half of the population from Latin America in 1990.
4. The immigrant population from Asia nearly doubled from 1900 to 1990.
