Topics: Breathing System Quiz
What is the percentage of carbon dioxide in exhaled air?
A. 78%
B. 14%
C. 5%
D. Variable
Select your answer:

Topics:
Surgical tech-safety Skills for Health Brain, Neurons and The Nervous System Gene Cloning Integumentary System Medical Terminology Diseases of Digestive System Eye and Ear Skin Structure Cybersecurity in Healthcare Health & Wellness Vocabulary Circulatory and Lymphatic System Dental Pharmacology Musculoskeletal System Responses to Exercises Human Organ System Cell InjuryOther quiz:
Circulatory / Respiratory › ViewWhich structure prevents the backflow of blood from the ventricles to the atria?
A. AV valves
B. septum
C. sinoatrial node
D. atrioventricular node
E. superior vena cava
Meiosis and intro to Genetics › View
Recessive alleles are-
A. capital
B. lowercase
C. both
D. neither