What is a measurement of the specific amount of a drug that will achieve 50% of the maximal response?

Which of the following conditions is associated with hypertension?

A. Anaphylaxis B. Sepsis C. Addison's disease D. Stroke

Each lobule of the testes is filled with ________, which are filled with the spermatogenic cells that give rise to sperm cells.

A. bulbourethral glands B. spermatogonia C. spermatids D. seminiferous tubules E. spermatocytes