Topics: Human Circulatory System Quiz
__________are structures that close to prevent blood from going backwards.
A. ventricles
B. valves
C. veins
D. arteries
Select your answer:
Topics:
Oral Hygiene Skeleton and Muscles Musculoskeletal Anatomy: Knee Immunity & Cancer Enzymes & Metabolism HL Cells & Body Systems Fluid Therapy Bones and Muscles Corona Nerve Injuries in Oral & Maxillofacial Surgery Respiration Anatomy and Physiology Microbial Growth & Nutrition Stress and Mental Health Histology Health and NutritionOther quiz:
Enzymes › ViewWhat is a substrate?
A. A product formed at the end of a reaction.
B. A tool used by enzymes to increase reaction speed.
C. The chemical substance(s) on which an enzyme acts.
D. A type of enzyme that speeds up chemical reactions.
Covid -19 › View
What is the incubation period for the Corona-virus?
A. 3-5 days
B. 7-10 days
C. up to 14 days
D. 24 hours