Select your answer:
Topics:
Plasmid Bones Anatomy Cells and Organ Systems Leaves The Cardiovascular System OCR A-level Breathing System Urinary System and Fluid Balance Musculoskeletal/Endocrine Systems Cell Structure and Functions Tib/Fib, Knee and Femur Tongue and Skin Anatomy of the Eye Excretion-Dialysis Biological Molecules Blood & Blood VesselsOther quiz:
Anatomy & Physiology: Respiratory › ViewThe driving force regulating breathing is ________.
A. blood O2 levels
B. blood glucose levels
C. blood CO2 levels
D. Both “blood CO2 levels” and “blood O2” levels.
Human Reproduction › View
Where are mature sperm stored, before they are ejaculated?
A. epididymis
B. seminiferous tubules
C. vas deferens
D. seminal vesicles
E. prostate gland