★ Breathing System Quiz
What is the percentage of nitrogen in inhaled air?
A. 78%
B. 21%
C. 0.04%
D. Variable
Select your answer:
Topics:
Homeostasis and Disease Homeotic Genes and Cancer Hematologic System Reproduction Energy, Hydrology, Microbiology Vet Terminology Types of Reproduction Fluid Therapy Teeths Body Systems & Anatomical Terms Sensory Disorder Hazards & Risks Immunity and Vaccines EMS Systems Illnesses and Diseases in CaregivingOther quiz:
Biological Organisms Classification › ViewDivision of organisms in a phylum, noted for common characteristics
A. class
B. kingdom
C. family
D. plantae
E. eukarya
Nervous System › View
How is bacterial meningitis treated?
A. Viatmins
B. Nothing
C. Oxygen
D. Antibiotics