
A.
To explain: The extracellular signal molecule acetylcholine has different effects on different cell types in an animal and often binds to different cell-surface receptor molecules on different cell types.
B.
To explain: After acetylcholine is secreted from cells, it is long-lived, because it has to reach target cells all over the body.
C.
To explain: How both the GTP-bound α subunits and
D.
To explain: IP3 is produced directly by the cleavage of an inositol phospholipid, without the incorporation of an additional phosphate group.
E.
To explain: Calmodulin regulates the intracellular Ca2+ concentration.
F.
To explain: Different signals originating from the plasma membrane can be integrated by cross-talk between different signaling pathways inside the cell.
G.
To explain: Tyrosine phosphorylation serves to build binding sites for other proteins to bind to RTKs.

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Chapter 16 Solutions
Essential Cell Biology (fifth Edition)
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- Hox1a most likely contributes to (blank) patterning in the developing embryo? Ventral, posterior, limb or anteriorarrow_forwardSelect all of the following that can help establish Hox gene expression boundaries (things that affect Hox and not things that Hox affects). Retinoic acid, anterior/posterior axis, fibroblast growth factors, vagal neural crest, and enhancersarrow_forwardEctopic expression of Hox often results in (blank) phenotypes. (Blank) transformations are characterized by the replacement of one body part/structure with another. Hoxeotic, homealoneotic, joexotic, or homeoticarrow_forward
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