the pigment produced to protect the skin from the effects of ultraviolet run rays is
A. keratin
B. melanin
C. elastin
D. collagen
Select your answer:
Topics:
Cells, Tissues and Organs SCI CH2-1 Immunology IBD First Aid Inflammation and Tissue Repair Stimuli and Responses in Humans MS Neurology RDA Dental Caries Types of Reproduction Adaptive Immune System Paeds Edema Tib/Fib, Knee and Femur Asthma Brain, Neurons and The Nervous System Molecular Genetics Integrated ScienceOther quiz:
Vascular › ViewWhich malformation may be associated with neck swelling post-CEA?
A. pseudoaneurysm
B. hematoma
C. infection
D. all of the above
Cardiorespiratory Endurance › View
Which statement is true?
A. A fit person’s heart may work more efficiently than a nonfit person’s heart because genetics determines the heart’s efficiency.
B. A fit person’s heart may work the same as a nonfit person’s heart because genetics determines the heart’s efficiency.
C. A fit person’s heart works more efficiently by pumping less blood with more beats.
D. A fit person’s heart works more efficiently by pumping more blood with fewer beats.