The first world-class African American tennis player was Althea Gibson. In 1950 she broke the color barrier in tennis by becoming the first black athlete to play in the United States national tennis championship. She was the sportâs top female player in the late 1950s, winning five Grand Slam singles events.
Following is a list of some of the more important ions in the cells and fluids of our bodies: 1  Sodium ions are the principal cations found outside cells in the body. They help regulate and control the level of body fluids. 2  Potassium ions are the principal cations found inside cells in the body. Bananas, orange juice, and potatoes are good sources of Potassium ions help regulate cellular functions, including nerve impulses and heartbeats, and the level of body fluids. Chloride ions are the principal anions found outside cells in the body.
The sodium-potassium pump functions to pump. A) sodium ions out of the cell and potassium ions into the cell. B) sodium ions into the cell and potassium ions out of the cell. C) sodium and potassium ions into the cell.