its middle layer is less thick and there are less ...

★ Biology Quiz

its middle layer is less thick and there are less elastic fibers

A. artery

B. vein

C. blood capillary

D. blood platelet

Select your answer:

Topics:

HHB Immunology Circulatory & Lymphatic Diseases Key Terms Body Fluids Blood and Hematology Anatomy & Physiology Gaseous Exchange in Humans First Aid Check up Hygiene and Nutrition Myocarditis Nature of Science Circulatory System and Nutrition Toxicology Musculoskeletal LE Adaptive Immune System

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Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How do these molecules get into the cell?

A. passive transport by diffusion

B. active transport using ATP

C. passive transport by osmosis

D. osmosis

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The immune system functions to protect our bodies by identifying cells or molecules that are foreign, such as:

A. viruses

B. bacteria

C. parasites

D. all of the above