Concept explainers
To determine:
The molecules that diffuse across the plasma membrane of cells lining capillaries.
Introduction:
Cells lining the capillaries are known as endothelial cells. Diffusion is the process of movement of a solute from an area of higher concentration to an area of lower concentration.
Explanation of Solution
• Oxygen and glucose concentration are higher in the blood, which must diffuse out of the cells leaving capillaries into the interstitial fluid.
• On the other hand, carbon dioxide levels are high in the interstitial fluid as the carbon dioxide diffuses out from the tissue cells.
• In the blood plasma, carbon dioxide concentration is lower; hence, carbon dioxide diffusion occurs across the capillary walls.
• In the blood plasma, small molecules that are water soluble like glucose amino acids, etc. diffuse into the intercellular clefts which are present between the endothelial cells in a continuous fashion in the capillaries.
• Oxygen and steroid hormones that are lipids soluble diffuse easily through the plasma membrane of endothelial cells.
Carbon dioxide, water-soluble substances like amino acids, glucose, etc. diffuse across the plasma membrane of endothelial cells.
Want to see more full solutions like this?
Chapter 12 Solutions
BIO 212 HUMAN BIOLOGY LAB NOTEBOOK
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education