During repolarization, __ ions are pumped out of the cell A. Sodium
B. Both sodium and potassium
C. Potassium
D. Calcium

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

What will happen if two of the base pairs of the stand of the dna are switched

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!