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Select the best answer. (A)  The nucleus of an atom contains [n] (B)  electrons are located [e] the nucleus (C)  The charge on the proton is [np] (D)  The charge on an electron is [ce]

Acetylcholine is actually a class of neurotransmitters that are essential for skeletal muscle contractions.

Which of the following is the threshold membrane potential of a general neuron?

Select the type of bond that will occur between these atoms: (A)  N and O  [A] (B)  K and Cl  [B]  

Which of these is the reason an action potential will only propagate in a single direction?

During which sleep stage do human vital signs decline?

Which of the following is NOT a degree of consciousness?

In the spinal cord, the gray matter is in the center and the white matter on the periphery.

Taste buds are found where?

Which neuroglial cell is responsible for immune functions in the central nervous system?