What is the function of the refractory period? What is the difference between the absolute and relative refractory periods?

Which functional division of the nervous system carries commands from the brain and spinal cord to the skeletal muscles?

At the synapse, which cell is releasing neurotransmitter?

A molecule of DNA belongs to the ___________ level of organization.

There is a higher concentration of sodium outside of the cell than inside of the cell. However, some sodium always leaks into the cell via leak channel proteins. Cells must then spend ATP in order to maintain the concentration gradient. In this case, sodium must be transported from ____________ via ____________.

Which of the following is not a property of skeletal muscle cells?

Which of the following statements regarding neurons is true?

How many electrons need to be held in the valence shell for an atom to achieve chemical stability (with the exception of helium and hydrogen)?

The central nervous system is composed of primarily which category of neurons?

Which of the following belongs to the cellular level of organization?