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C. Territory between Russia and the Ottoman Empire.
Answer:
active on both the state and national levels.
Explanation:
The National Rifle Association is a non for profit organization in United States of America. It was established as a governing institution for shooting sports with pistols and rifles.
The United States Chamber of Commerce is a lobbying group which is business oriented. It supports more than three million businesses in the U.S. of all sectors and sizes.
The Mothers Against Drunk Driving is also a non profit institution operating in United States and Canada which supports people who are affected by the drunk driving, it prevents drunk driving as well as underage drinking.
The National Education Association is the largest union group in the United States. It supports people those who wants to become teachers and educators. It represent the faculties and school teachers.
All of these bodies are active and operate in both national and state levels.
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.
Firstly the United States of America told the president of USSR that they were getting wrongly involved with Afghanistan and they should immediately withdraw. On falling in deaf ears, the United States did not participate in 1980 Summer Olympics that was held in Moscow. After this the United states started supplying arms to the various Afghan resistance groups.
