what is the oily secretion that lubricates the skin and preserves the softness of the hair
A. sebum
B. collagen
C. elastin
D. perspiration
Select your answer:
Topics:
Cells & Body Systems Foot Orthosis Vocab Bacteria & Viruses Heredity and Living Cells Skeletal System Vocabulary The Cardiovascular System OCR A-level Integumentary and Musculoskeletal Systems Pulmonology The Digestive System Homeostasis Respiratory Acidosis Cells Pulse Digestion Public Health and Genetic DiseaseOther quiz:
Oral Surgery › ViewThe enzyme secreted by Streptococcus pyogenes which break protein barriers is
A. Streptokinase
B. Hyaluronidase
C. Both a & b
D. None of the above
Adaptive Immune System › View
Once a B cell has been selected via a T Helper cell, it undergoes clonal expansion and differentiation. This means:
A. All B cells that don’t fit the appropriate antigen are destroyed by NK Cells
B. The B Cell is activated and awaits a subsequent encounter with the pathogen before it replicates
C. B cells replicate and produce large numbers of memory cells as well as some plasma cells
D. B cells replicate and produce large numbers of plasma cells as well as some memory cells