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:
World Health Day Pathophysiology Circulatory System - Pathway of Blood All About Bacteria Neurological Concepts Muscular System Movements Nutrient Cycling The Brain Genetics Fluid and Electrolytes Health and The Environment Genes, Chromosomes and Genome Entomology Molecular Basis of Inheritance Metabolic SauverOther quiz:
Respiratory and Circulatory › ViewWhich is NOT a function of the respiratory system?
A. Deliver oxygen to the blood through the lungs
B. Remove carbon dioxide from the blood through the lungs
C. Deliver oxygen to the body
D. Produce sound and allow us to speak
Your Body › View
What is the function of the nervous system?
A. Controls all parts of the body; sends signals between the brain, spinal cord, and nerve endings
B. To fight off diseases
C. What happens when you get nervous to do something
D. To carry oxygen, nutrients, and blood throughout the body