LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 4, Problem 9CR
Summary Introduction
To determine:
The reason that gaps junctions are important to cardiac muscle cells.
Introduction:
The muscles that are found in the heart are called cardiac muscles. The cells that form cardiac muscles are known as cardiac muscle cells. It has been observed that cardiac muscle cells have a junction called gap junction present between them.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What are the two major Contractile Proteins? Which of the proteins is "bound" and "anchored" to the cell membrane? The other protein essentially "floats" within the cytoplasm; which contractile protein "floats".
Analogs of hemidesmosomes are the focal contact sites, which are also sites where the cell attaches to the extracellular matrix. These junctions are prevalent in fibroblasts but largely absent in epithelial cells. on the other hand, hemidesmosomes are prevalent in epithelial cells but absent in fibroblasts. In focal contact sites, intracellular connections are made to actin filaments, whereas in hemidesmosomes connections are made to intermediate filaments. Why do you suppose these two different cell types attach differently to the extracellular matrix?
During a histological examination of muscle tissue you see a cell that is striated. You determine that it is a cardiac myocyte because it
Possesses multiple nuclei per cell
O Contains neuromuscular junctions
Has intercalated disks with one nucleus per cell
Is spindle shaped with a single nucleus
Lacks intercalated disks
Chapter 4 Solutions
LooseLeaf for Human Anatomy
Ch. 4 - Prob. 1WYLCh. 4 - Prob. 2WYLCh. 4 - Prob. 3WYLCh. 4 - What two main characteristics are used to classify...Ch. 4 - Why is one epithelium referred to as...Ch. 4 - What are the two basic parts of a multicellular...Ch. 4 - Prob. 7WYLCh. 4 - What is the extracellular matrix? What are its...Ch. 4 - What three categories are used to classify...Ch. 4 - Identify the three types of protein fibers in...
Ch. 4 - Prob. 11WYLCh. 4 - What is the function of mucous membrane?Ch. 4 - Prob. 13WYLCh. 4 - What type of muscle tissue has long, cylindrical,...Ch. 4 - Prob. 15WYLCh. 4 - What general name is applied to the supporting...Ch. 4 - Match each numbered item with the most closely...Ch. 4 - Prob. 1MCCh. 4 - Prob. 2MCCh. 4 - Prob. 3MCCh. 4 - Prob. 4MCCh. 4 - Prob. 5MCCh. 4 - Prob. 6MCCh. 4 - Prob. 7MCCh. 4 - Prob. 8MCCh. 4 - Prob. 9MCCh. 4 - A gland that releases its secretion from secretory...Ch. 4 - What are some common characteristics of all types...Ch. 4 - Prob. 2CRCh. 4 - List the epithelial type that is found a lining...Ch. 4 - Prob. 4CRCh. 4 - What characteristics are common to all connective...Ch. 4 - What are the main structural differences between...Ch. 4 - In what regions of the body would you expect...Ch. 4 - Prob. 8CRCh. 4 - Prob. 9CRCh. 4 - Prob. 10CRCh. 4 - Prob. 1DCRCh. 4 - Prob. 2DCR
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- During a microscopy exercise in the anatomy laboratory,a student makes the following observations about a tissuesection: (1) The section contains some different types ofscattered protein fibers—that is, they exhibit differentwidths, some are branched, some are long and unbranched,and their staining characteristics differ (some are seenonly with specific stains). (2) Several cell types withdifferent morphologies are scattered throughout the section,but these cells are not grouped tightly together. (3) Theexamined section has some “open spaces”—that is, placesbetween cells and the observed fibers in the section thatappear clear with no recognizable features. What type oftissue is the student observing? Where might this tissue befound in the body?arrow_forwardThe trans epithelial electrical resistance (TEER) is a characteristic property of an epithelium. Which of the following statements best describes the TEER? a.) A high trans epithelial electrical resistance (TEER) is an indicator of a leaky epithelium in which paracellular diffusion of solute is likely to be high b.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight attachment between the epithelium and the basement membrane in which diffusion of solute across the basolateral surface is likely to be low c.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight epithelium in which paracellular diffusion of solute is likely to be lowarrow_forwardHow does NaCl and adding water change the size of ameoba and size of contractile vacules under microscope?arrow_forward
- Why are adherins junctions so rigid?arrow_forwardIn cells, actin filaments form bundles or networks. How do cells form such structures, and what specifically determines whether actin filaments will form a bundle or a network?arrow_forwardDoes skeletal muscle, like cardiac muscle, have gap junctions between adjacent cells? Why or why not?arrow_forward
- Which cellular function may be disrupted because of a malformation of the intermediate filaments?arrow_forwardWhat are the three major types of protein fibers in the extracellular matrix? Describe briefly.arrow_forwardWhich type(s) of cell junctions contain actin filaments? Which contain(s)intermediate filaments? Which contain(s) integrins? Which contain(s) cadherins?arrow_forward
- Define syndesmosisarrow_forwardThe contraction of cardiac muscle cells results from the increase in calcium ion levels in the cytosol. For the cells to relax, an antiport removes calcium ion from the cytosol for every sodium ion that is taken in. Digitalis is a drug that is used to make the heart contract more strongly. This drug partially inhibits the Na+-K+ ATPase in the cardiac cells. Applying the concepts about membrane transport, answer the following: a. Propose an explanation for the drug’s effect.b. What will likely happen if too much of the drug is taken in? Why?arrow_forwardOne way to characterise biological tissue is to send a small electrical current through the tissue and measure the opposition to flow of that current through the tissue. In humans, the resistivity of fat is considerably greater than for muscle, which in turn is considerably greater than for blood and other body fluids. This can be used to analyse body composition, in particular, to estimate body fat percentage. (a) Using a simple model of fat versus non-fat tissue, draw a circuit diagram to represent the possible flows of current through the tissue. (b) Why would the analysis of body composition need to take into account the height and weight of the person? (c) How could the level of hydration or electrolyte abnormalities in the person affect the results of the analysis? DII Prt Scn a Home 9 F4 ES F6 F7 2$ & 4 6 7 8. 9arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Types of Human Body Tissue; Author: MooMooMath and Science;https://www.youtube.com/watch?v=O0ZvbPak4ck;License: Standard YouTube License, CC-BY