Prior to the onset of an action potential which of the following channel proteins are closed Select all that apply.

It takes a muscle longer to contract than to relax

Which of the falling is an infection of the eye

Explain the steps of smooth muscle contraction .

During which sleep stage do human vital signs decline?

Molecules from olfactant bind to receptors found where?

The outer membrane that covers a muscle cell is which?

Which brain wave would we see in someone who is awake but relaxed and calm?

Which of the following would you expect to pass freely through the blood brain barrier?

Select the type of bond that will occur between these atoms: (A)  H and O  (B)  Na and Cl