Cell Homeostasis Quiz
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Questions and Answers

What is the main role of the cell membrane in maintaining homeostasis?

  • Regulation of the passage of materials into and out of the cell (correct)
  • Maintenance of electrochemical gradients
  • Production of insulin and glucagon
  • Synthesis of glucose

    • How does the presence of cholesterol in the cell membrane contribute to homeostasis?

  • It regulates the flow of ions
  • It promotes the synthesis of insulin
  • It helps keep the membrane fluid, allowing materials to move across (correct)
  • It initiates the breakdown of glycogen

    • What is the process of water moving from a high concentration to a low concentration across the cell membrane called?

  • Endocytosis
  • Active transport
  • Exocytosis
  • Osmosis (correct)

    • How does the cell membrane regulate the flow of ions into and out of the cell?

    <p>By controlling the types of channels in the membrane</p> Signup and view all the answers

    What is the main function of aquaporins in the cell membrane?

    <p>Regulating the movement of water</p> Signup and view all the answers

    How does the cell maintain high concentrations of potassium ions inside the cell?

    <p>Through active transport</p> Signup and view all the answers

    What is the primary role of the phospholipid bilayer in the cell membrane?

    <p>Forming the structure of the membrane</p> Signup and view all the answers

    How do proteins in the cell membrane contribute to homeostasis?

    <p>By facilitating the movement of large or charged molecules across the membrane</p> Signup and view all the answers

    How is homeostasis maintained in living systems?

    <p>Through negative feedback loops</p> Signup and view all the answers

    What happens when the body temperature of humans exceeds the optimal level of 98.6 degrees Fahrenheit?

    <p>Sweating and dilation of blood vessels in extremities occur</p> Signup and view all the answers

    What triggers the release of insulin in the body to maintain glucose homeostasis?

    <p>Rising blood glucose levels</p> Signup and view all the answers

    What is the role of negative feedback loops in maintaining stable internal conditions?

    <p>To counteract deviations from the set point</p> Signup and view all the answers

    Which of the following is an example of homeostasis in living organisms?

    <p>Regulation of water and salt balance</p> Signup and view all the answers

    What is the optimal body temperature for humans?

    <p>98.6 degrees Fahrenheit</p> Signup and view all the answers

    How do negative feedback loops help to keep the body at the optimal temperature?

    <p>By activating mechanisms to cool down or warm up the body as needed</p> Signup and view all the answers

    How is homeostasis maintained in cells?

    <p>Through negative feedback loops</p> Signup and view all the answers

    What is the optimal body temperature for humans?

    <p>98.6 degrees Fahrenheit</p> Signup and view all the answers

    Which mechanism is activated when the body temperature of humans goes above the optimal level?

    <p>Sweating and dilation of blood vessels in extremities</p> Signup and view all the answers

    What triggers the pancreas to release insulin in the context of glucose homeostasis?

    <p>Rising blood glucose levels</p> Signup and view all the answers

    What is the purpose of negative feedback loops in maintaining homeostasis?

    <p>To counteract changes and maintain stability</p> Signup and view all the answers

    What are some examples of homeostasis mentioned in the text?

    <p>Regulation of water and salt balance, glucose levels, and blood pressure</p> Signup and view all the answers

    What are the conditions maintained by living systems through homeostasis?

    <p>Internal conditions that allow organisms to function best</p> Signup and view all the answers

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