★ Organic Compounds, Minerals and Enzymes Quiz
Nitrogen is vital to life because it is a key component of:
A. proteins
B. laughing gas
C. carbohydrates
D. lipids
Select your answer:
Topics:
Skeleton and Muscles Lungs Brain and Nervous System Nutritional Measurements Mutations, Replication, and Cancer Vision and Light The Musculoskeletal and Integumentary Systems Nutrients in Food Blood Donation Special Senses Health Related Fitness Vaccines Biotherapeutics & Cellular Meat Disabilities Auditory and Vestibular Neurology MicrobesOther quiz:
Cardiorespiratory Endurance › ViewWhich is a specific benefit of physical activity and increased cardiorespiratory endurance for lungs?
A. more efficient respiratory muscles
B. increased stamina
C. sleep improvement
D. better heart
Vision › View
What is the muscle that opens and closes the pupil?
A. food
B. transluscent
C. iris
D. lens