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Chapter 9: Q. 25 (page 252)
What are the differences between internal receptors and cell-surface receptors?
Internal receptors are located within the cell and their ligands enter the cell to attach with receptor. Cell-surface receptors are attached with plasma membrane and their ligands do not enter the cell.
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Pseudomonas infections are very common in hospital settings. Why would it be important for doctors to determine the bacterial load before treating an infected patient?
How does the extracellular matrix control the growth of cells?
The same second messengers are used in many different cells, but the response to second messengers is different in each cell. How is this possible?
The secretion of hormones by the pituitary gland is an example of _______________.
a. autocrine signaling
b. paracrine signaling
c. endocrine signaling
d. direct signaling across gap junctions
A doctor is researching new ways to treat biofilms on artificial joints. Which approach would best help prevent bacterial colonization of the medical implants?
a. Increase antibiotic dosing
b. Create implants with rougher surfaces
c. Vaccinate patients against all pathogenic bacteria
d. Inhibit quorum sensing
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