The urethra is indicated by ________

When ventricular pressure exceeds atrial pressure, the

A. blood is pumped into the atrium. B. ventricle is in diastole. C. atria pump blood into the ventricles. D. AV valves close. E. ejection occurs.

The period from conception until birth is the ________ period.

A. embryonic B. conceptual C. prenatal D. germinal E. fetal

The support and protection of neurons rests with

A. neuroglia. B. dendrites. C. axons. D. trabeculae. E. ligaments.

After being produced, ________ provides the blueprint for assembling proteins.

A. mtRNA B. rRNA C. tRNA D. mRNA