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www.reference.com/article/services-quizlet-b930bd6e07539986

Quizlet allows users to create and browse over 40 million previously created study sets and quizzes. Study sets contain flash cards, quizzes, audio training and games designed to help individuals study various topics. Quizlet is also available as an app on iPhone and Android mobile devices.

www.reference.com/article/quizlet-cards-6f0889046cdb01b2

Quizlet cards are virtual flash cards created by the users of Quizlet.com. Teachers use Quizlet to provide online study resources for their students. Learners locate relevant study cards to assist in studying particular subjects. To access Quizlet, users must first register through Google, Facebook

www.reference.com/article/things-can-quizlet-app-5ec8d8e1fa8c7af3

The Quizlet app is a mobile version of Quizlet.com, so the app provides the study tools, flash cards, and games that are found on the website. All content on the site and app is user generated.

www.reference.com/article/use-quizlet-flash-cards-eaf4c5dc42c4892b

As of 2015, signing up for Quizlet flashcards is free, although users have the option to add superpowers to their accounts for a modest charge. Once logged in, users create study sets, record voices or study from existing sets. Creating a class group makes group study possible.

www.reference.com/article/can-quizlet-practice-tests-taken-bc235ed3d739759

Quizlet practice tests on many different subjects are available at Quizlet.com. To take these tests, users must first sign up at the website using Facebook, Google or their email address. Quizlet is available on home or school computers as well as through iOS and Android mobile apps.

www.reference.com/article/create-quizlet-flashcards-2116c461d65f7cf3

To create Quizlet flashcards, visit the site at Quizlet.com and click on the icon indicating Create a Set. Next select the language of reception, typically English or Spanish, and then the language to be translated. You can create up to 2,000 pairs of flashcards per set.

www.reference.com/science/sodium-potassium-pump-9f419012a1048ccb

The sodium-potassium pump is an essential cellular membrane protein that functions by pumping out three sodium ions and taking in two potassium ions. This mechanism preserves the electrochemical gradient formed from the varying concentrations of sodium and potassium ions within the cell and its exte

www.reference.com/world-view/causes-low-sodium-potassium-levels-bacdfc1ab5a71925

The causes of low sodium levels include drinking too much water; disorders of the heart, liver or kidney; and certain medications such as diuretics, according to the Mayo Clinic. Conditions that cause chronic vomiting can also lead to low potassium levels.

www.reference.com/world-view/causes-high-potassium-d560232dac6ccc6b

High serum potassium, known as hyperkalemia, can occur when kidneys do not function correctly or when an individual’s diet is abnormally high in potassium. Other causes include the breakdown of red blood cells or muscle tissue, trauma and uncontrolled diabetes, according to WebMD.

www.reference.com/article/potassium-made-94b4aa4878737f45

Potassium is a natural element; therefore, it isn't made. As a highly reactive metal, virtually no potassium occurs naturally in its elemental state. Instead, most potassium is obtained from mines in the form of potassium chloride or sulfate salts. A small amount of potassium that is used industrial