The centripetal force on an object in circular motion is a. in the same direction as the tangential speed. b. in the direction opposite the tangential speed. c. in the same direction as the centripetal acceleration. d. in the direction opposite the centripetal acceleration.

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mm glucose and 1 mm sodium chloride. if the vesicle is placed in pure water, which of the following happens faster? a. na+ diffuses out. b. cl– diffuses out. c. h2o diffuses in. d. glucose diffuses out. e. sodium chloride diffuses out.