A cell secretes a product that diffuses through the interstitial fluid and acts on nearby cells. This process is an example of (a) neuroendocrine secretion (b) autocrine signaling (c) paracrine signaling (d) classical endocrine regulation (e) peptide hormone function
Introduction: The endocrine system is the chemical signaling system that uses blood vessels as information channels. The endocrine glands are ductless organs located within the organ systems and contain groups of endocrine cells that secrete their hormones directly into their surroundings.
Answer to Problem 1TYU
Correct answer: A cell secretes a product that diffuses through the interstitial fluid and acts on nearby cells. This process is an example of paracrine signaling. Hence, the correct answer is option (c).
Explanation of Solution
Reason for the correct answer:
Option (c) is given as “paracrine signaling”.
When a cell signals nearby cells by using chemical messengers is known as paracrine signaling. It acts on neighboring cells. In paracrine signaling, the ligands diffuse through interstitial fluid, gap junctions, and extracellular matrix. Hence, the correct answer is option (c).
Reasons for incorrect answers:
Option (a) is given as “neuroendocrine secretion”. The type of endocrine signaling in which neurohormones are secreted by neuroendocrine cells and released into the intestinal fluid is known a neuroendocrine signaling. It acts on specific target cells. Hence, option (a) is incorrect.
Option (b) is given as “autocrine signaling”. When a cell signals itself by using chemical messengers is known as autocrine signaling. Hence, option (b) is incorrect.
Option (d) is given as “classical endocrine regulation”. The type of endocrine signaling in which hormones are secreted by the endocrine glands and are transported to target cells through the blood is known a classical endocrine signaling. Hence, option (d) is incorrect.
Option (e) is given as, “peptide hormone function”. Peptide hormone carries out its action by way of second messengers. This hormone binds with G protein-linked receptor in plasma membrane. Hence, option (e) is incorrect.
Hence, options (a), (b), (d), and (e) are incorrect.
A cell secretes a product that diffuses through the interstitial fluid and acts on nearby cells. This is an example of paracrine signaling.
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Chapter 49 Solutions
Biology (MindTap Course List)
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