★ Immune System Quiz
Which of the following prevents pathogens from ever entering the body?
A. skin
B. sneezing
C. immunity
D. antibodies
Select your answer:
Topics:
Mutations, Replication, and Cancer Illness and Symptoms Orthopaedic Neurology Body Structures and Organ Systems Carbohydrates, Proteins and Lipids Living Organisms & Animal Behaviors Discovery of DNA Systematic Bacteriology The Skeletal System Toxicology Immune Cells Faction Coronary Heart Diseases Absorption, Lymphatic System, and Blood Vessels Neurological Disorders Disability Etiquette & Physical ActivitiesOther quiz:
Reproduction › ViewDuring spermatogenesis, which of the following cells is the first to become haploid?
A. primary spermatocyte
B. secondary spermatocyte
C. sperm cells
D. spermatid
E. spermatogonium
Muscle Anatomy › View
____________ attaches to actin to form the cross bridge.
A. Troponin
B. Tropomyosin
C. Myosin
D. Calcium