Which of the following molecules is least likely to cross a cellular membrane by simple diffusion?
A. carbon dioxide
B. nitrogen
C. potassium ion
D. water
Select your answer:
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Cardiology Asthma Knee Anatomy AEMT EMS Systems Polio Fungi/Bacteria/Biotechnology Cardiovascular System Anatomy Autism Awareness Skin Structure and Growth Skeletal Tissue Genetic Diseases Genes, Genomes & Alleles Biochemistry/Cells Immunology: T cell Development Therapeutic Services RootsOther quiz:
Disease as a Failure of Homeostasis › ViewDescribe how a vaccine protects the body from disease.
A. weakened or dead pathogen is identified by the immune system causing the production of antigens
B. weakened or dead pathogen is identified by the immune system causing the production of antibiotics
C. weakened or dead pathogen is identified by the immune system causing the production of antibodies
D. a live pathogen is identified by the immune system causing the production of antigens
Body System Interactions › View
How does the Circulatory System help the Muscular System?
A. Protects muscles
B. Sends messages to the muscles to contract
C. Brings oxygen into the body
D. Delivers nutrients and oxygen to muscle tissue