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Topics:
Respiration, Immune System, Blood Cells Tissues Vocabulary Cardiovascular System Terminology Cardiovascular Adaptation Refresher Teeth and Microbes Medicinal use of Microorganisims Inflammation and Tissue Repair CV System A&P & Pathology Anatomy Muscles Immunity in Humans Medical Terminology Integumentary System PHE Musculoskeletal/Endocrine Systems How the Eyes workOther quiz:
Musculoskeletal System › ViewEach myofibril is made up of tiny units called:
A. Myofilaments
B. Myosin
C. Actin
D. Sarcomeres
Respiration in Organisms › View
What is the significance of carbon dioxide in respiration?
A. Carbon dioxide is a waste product that has no role in respiration.
B. Carbon dioxide is used to create energy in the form of ATP.
C. Carbon dioxide is only produced during exercise and not at rest.
D. Carbon dioxide is significant in respiration as it regulates breathing and maintains blood pH.