- Cnidarians (which include jellies, sea anemones and corals) are classified by a unique type of cell, the cnidocyte (see p. 647 for review), which, when discharged, forcibly ejects a toxic barbed spear into prey. These "stinging" cells discharge when a trigger (cnidocil) on the surface of the cell is activated by a prey, causing Ca to rush into the cnidocyte. Water follows the Ca2 resulting is a high osmotic pressure which leads to the explosive discharge of the barbed spear. Researchers have found that physical touch alone isn't enough to induce a cnidocyte discharge. Supporting cells, which can detect prey, are connected to several cnidocytes through neural connections, help regulate groups of cnidocytes. Using the description above, deduce the different types of sensory cells that operate cnidocyte discharge including the mechanisms that induce an action potential.
- Cnidarians (which include jellies, sea anemones and corals) are classified by a unique type of cell, the cnidocyte (see p. 647 for review), which, when discharged, forcibly ejects a toxic barbed spear into prey. These "stinging" cells discharge when a trigger (cnidocil) on the surface of the cell is activated by a prey, causing Ca to rush into the cnidocyte. Water follows the Ca2 resulting is a high osmotic pressure which leads to the explosive discharge of the barbed spear. Researchers have found that physical touch alone isn't enough to induce a cnidocyte discharge. Supporting cells, which can detect prey, are connected to several cnidocytes through neural connections, help regulate groups of cnidocytes. Using the description above, deduce the different types of sensory cells that operate cnidocyte discharge including the mechanisms that induce an action potential.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:* Cnidarians (which include jellies, sea anemones and corals) are classified by a unique type of cell, the cnidocyte (see p. 647 for review), which, when
discharged, forcibly ejects a toxic barbed spear into prey. These "stinging" cells discharge when a trigger (cnidocil) on the surface of the cell is
activated by a prey, causing Ca2* to rush into the cnidocyte. Water follows the Ca2+ resulting is a high osmotic pressure which leads to the explosive
discharge of the barbed spear. Researchers have found that physical touch alone isn't enough to induce a cnidocyte discharge. Supporting cells,
which can detect prey, are connected to several cnidocytes through neural connections, help regulate groups of cnidocytes. Using the description
above, deduce the different types of sensory cells that operate cnidocyte discharge including the mechanisms that induce an action potential.
2. Calmodulin is found in smooth muscle cells and performs a similar function to troponin in striated muscle fibers. However, calmodulin not only gets
activated by Ca2+ but also slows the release of Ca2+ from the sarcoplasmic reticulum. How might this difference relate to the different kinds of
contractions smooth muscles do in comparison to ctria
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