The gas nitric oxide has been identified as a signaling...

Name: Problem 6, Chapter 9: Biology for AP Courses
Uploaded: 2019-07-26T01:59:06-08:00
Duration: 2 min 11 s
Channel: Bryan Lynn
Description: The gas nitric oxide has been identified as a signaling molecule. Which of the following mechanisms of action would you expect from a gaseous molecule? a. It binds to a G-protein-linked receptor. b. It binds to a receptor tyrosine kinase. c. It binds to a gated ion channel. d. It binds to an intracellular receptor

The gas nitric oxide has been identified as a signaling molecule. Which of the following mechanisms of action would you expect from a gaseous molecule? a. It binds to a G-protein-linked receptor. b. It binds to a receptor tyrosine kinase. c. It binds to a gated ion channel. d. It binds to an intracellular receptor

The gas nitric oxide has been identified as a signaling molecule. Which of the following mechanisms of action would you expect from a gaseous molecule?
a. It binds to a G-protein-linked receptor.
b. It binds to a receptor tyrosine kinase.
c. It binds to a gated ion channel.
d. It binds to an intracellular receptor

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Key Concepts

Diffusion Across Cell Membranes

The ability to diffuse across cell membranes is a defining feature of gaseous molecules such as nitric oxide. This property enables them to rapidly alter cellular activities by directly interacting with internal targets, contrasting with signaling molecules that depend on receptor binding at the cell surface.

Intracellular Receptors

Intracellular receptors are located within the cell, typically in the cytoplasm or nucleus, and bind signaling molecules that can permeate the cell membrane. This mode of receptor action is crucial for signaling molecules like nitric oxide, which bypasses extracellular receptors to directly activate internal signaling pathways.

Gasotransmitters

Gasotransmitters are small, gaseous signaling molecules that can easily diffuse across cell membranes without the need for conventional membrane-bound receptors. Their unique physicochemical properties allow them to quickly influence target cells and modulate various physiological processes.

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