
To explain:
The reason that why the defective protein results in a thick sticky mucous outside the cells rather than a loose fluid covering in cystic fibrosis genetic disorder.
Introduction:
The cystic fibrosis transmembrane conductance regulator (CFTR) protein is expressed when an individual inherits a pair of the recessive allele of the cystic fibrosis gene. This gene then expresses and translates into nonfunctional proteins (cystic fibrosis). This protein then forms a transmembrane conductance regulator which forms the chlorine channels that surrounds the membranes, which produce mucus, sweat and tears. Any mutation in genes of CFTR cause the cystic fibrosis disorder and affect the transmembrane protein functioning.

Explanation of Solution
Chlorine channels present on the cell membrane are necessary for the transport of chloride ions that helps in the water movement which is essential for the production of mucus. Mucous is a mixture of water and glycoproteins. The balance between water and volume of mucous is maintained by the release and absorption of ions and water across the cell membrane. This mucus protects the epithelial lining of lungs and
But in a genetic disorder cystic fibrosis, improper folding of the cystic fibrosis proteins affects the functioning of the chlorine channels which prevents the efflux of chloride ions outside the cell. Thus, chlorine ions are accumulated inside the cells that results in less water movement outside and formation of mucous outside the cell. Due to closure of channels, the water movement outside the cell is prevented and the water content of mucous decreases. This results in more thick and sticky mucus accumulation instead of fluid outside the cell. This causes entrapment of bacteria as the cilia of epithelial cells are unable to remove excess mucous from the surrounding of cell. This causes the chronic respiratory infections.
The prevention of efflux of chloride ions outside the cell disturbs the balance between water and mucous volume as water does not leave cells and causes more thick mucus formation instead of fluid.
Want to see more full solutions like this?
Chapter 5 Solutions
BIOLOGY (LOOSELEAF)
- You intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forwardDescribe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forwardThe following table is from Kumar et. al. Highly Selective Dopamine D3 Receptor (DR) Antagonists and Partial Agonists Based on Eticlopride and the D3R Crystal Structure: New Leads for Opioid Dependence Treatment. J. Med Chem 2016.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?arrow_forwardWhat protein is necessary for packaging acetylcholine into synaptic vesicles?arrow_forward1. Match each vocabulary term to its best descriptor A. affinity B. efficacy C. inert D. mimic E. how drugs move through body F. how drugs bind Kd Bmax Agonist Antagonist Pharmacokinetics Pharmacodynamicsarrow_forward
- 50 mg dose of a drug is given orally to a patient. The bioavailability of the drug is 0.2. What is the volume of distribution of the drug if the plasma concentration is 1 mg/L? Be sure to provide units.arrow_forwardDetermine Kd and Bmax from the following Scatchard plot. Make sure to include units.arrow_forwardChoose a catecholamine neurotransmitter and describe/draw the components of the synapse important for its signaling including synthesis, packaging into vesicles, receptors, transporters/degradative enzymes. Describe 2 drugs that can act on this system.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. a) Which has a higher potency? b) Which is has a higher efficacy? c) What is the approximate Kd of capsaicin in uM? (you can round to the nearest power of 10)arrow_forwardWhat is the rate-limiting-step for serotonin synthesis?arrow_forwardWhat enzyme is necessary for synthesis of all of the monoamines?arrow_forward
- 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





