Cell Biology - Cytosis and Processes
40 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following is NOT a type of passive transport?

  • Facilitated Diffusion
  • Osmosis
  • Diffusion
  • Active Transport (correct)

    • Homeostasis refers to the balance maintained by moving materials into and out of the cell.

    True

    What is the role of the plasma membrane?

    To separate the living cell from its surroundings and control the movement of substances.

    The net movement of molecules from an area of high concentration to an area of low concentration is called __________.

    <p>diffusion</p> Signup and view all the answers

    Match the types of transport with their definitions:

    <p>Diffusion = Movement from high to low concentration Osmosis = Diffusion of water across a membrane Facilitated Diffusion = Movement through specific channels Active Transport = Movement requiring energy</p> Signup and view all the answers

    What must move into the cell to maintain homeostasis?

    <p>Nutrient elements</p> Signup and view all the answers

    Facilitated diffusion is a form of active transport.

    <p>False</p> Signup and view all the answers

    What is the primary purpose of active transport?

    <p>To move substances against their concentration gradient using energy.</p> Signup and view all the answers

    In which container did the coffee powder scatter the fastest?

    <p>Hot water</p> Signup and view all the answers

    Coffee powder scatters slowly in cold water compared to hot water.

    <p>True</p> Signup and view all the answers

    What is the main principle behind diffusion observed in the experiment?

    <p>Movement of solute from an area of greater concentration to an area of lesser concentration.</p> Signup and view all the answers

    In passive transport, _____ is needed for movement across the membrane.

    <p>no energy</p> Signup and view all the answers

    Match the following types of transport to their characteristics:

    <p>Active Transport = Requires energy Passive Transport = No energy required Diffusion = From high concentration to low concentration Osmosis = Movement of water across a semi-permeable membrane</p> Signup and view all the answers

    What happens to the coffee powder when a drop of dye is added to each container?

    <p>It changes color.</p> Signup and view all the answers

    Osmosis refers to the movement of solute particles, not water.

    <p>False</p> Signup and view all the answers

    What two types of transport can be compared using a Venn diagram?

    <p>Active Transport and Passive Transport</p> Signup and view all the answers

    What process do plant roots primarily use to absorb nutrients from the soil?

    <p>Active transport</p> Signup and view all the answers

    Lettuce remains fresh due to the active transport of water into its cells.

    <p>False</p> Signup and view all the answers

    Why do we need to drink at least eight glasses of water a day?

    <p>To maintain hydration and support essential bodily functions.</p> Signup and view all the answers

    Cells in plant roots absorb nutrients through ______.

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

    Match the following concepts with their descriptions:

    <p>Active transport = Absorption of substances against concentration gradient Diffusion = Movement of substances from high to low concentration Homeostasis = Maintenance of stable internal conditions Osmosis = Movement of water across a permeable membrane</p> Signup and view all the answers

    Which process is vital for preserving meat in a salty solution?

    <p>Osmosis</p> Signup and view all the answers

    Rice plants benefit from water flowing into their fields during high tide.

    <p>True</p> Signup and view all the answers

    Explain why lettuce must be kept damp to keep its freshness and crispness.

    <p>Lettuce must be kept damp to prevent wilting and maintain turgidity.</p> Signup and view all the answers

    What happens to plant cells when placed in a hypertonic solution?

    <p>They shrink</p> Signup and view all the answers

    In a hypotonic solution, plant cells gain water and can burst.

    <p>False</p> Signup and view all the answers

    What occurs to Addy's hands after spending time in the pool?

    <p>They wrinkle due to osmosis.</p> Signup and view all the answers

    Dextrose was injected to a patient with malnutrition, causing their cells to experience __________.

    <p>osmosis</p> Signup and view all the answers

    Match the situations with their osmosis effects:

    <p>Addy's wrinkled hands = Hypotonic environment Gummy bears in water = Hypertonic environment Dextrose injection = Cellular swelling Cooking fish with salt = Water loss from cells</p> Signup and view all the answers

    What is the primary reason gummy bears swell when soaked in water?

    <p>Osmosis causes water to enter them.</p> Signup and view all the answers

    Cooking fish with salt draws moisture out of the cells.

    <p>True</p> Signup and view all the answers

    What is the main principle behind how materials move through osmosis?

    <p>Water moves from lower to higher solute concentration.</p> Signup and view all the answers

    What process requires energy to transport substances from lower to higher concentrations?

    <p>Active transport</p> Signup and view all the answers

    Osmosis only occurs in liquids that have the same concentration on both sides.

    <p>False</p> Signup and view all the answers

    What is the effect of temperature on the rate of diffusion?

    <p>Diffusion increases as temperature increases.</p> Signup and view all the answers

    The process of _____ involves engulfing substances by the cell membrane.

    <p>endocytosis</p> Signup and view all the answers

    Match the following types of transport with their characteristics:

    <p>Active transport = Requires energy to move substances Passive transport = Does not require energy Osmosis = Diffusion of water across a membrane Endocytosis = Process of taking in substances by a cell</p> Signup and view all the answers

    Which of the following best describes phagocytosis?

    <p>The engulfing of large particles by the cell</p> Signup and view all the answers

    Osmosis requires the presence of a semi-permeable membrane.

    <p>True</p> Signup and view all the answers

    What term describes the movement of solute from an area of higher concentration to an area of lower concentration?

    <p>Diffusion</p> Signup and view all the answers

    Study Notes

    Transport of Materials

    • The plasma membrane separates the cell from its environment and is semipermeable, allowing selective passage of substances.
    • Homeostasis is maintained by balancing the movement of materials such as oxygen and nutrients into the cell and waste products out.
    • Transport mechanisms can be categorized as active transport (requiring energy) and passive transport (not requiring energy).

    Passive Transport

    • Movement of substances through membranes without the use of energy.
    • Three main types of passive transport:
      • Diffusion: Spontaneous movement of molecules from high to low concentration.
      • Osmosis: Special case of diffusion specifically involving water across a semipermeable membrane.
      • Facilitated Diffusion: Movement aided by transport proteins in the membrane.

    Osmosis and Cell Dynamics

    • Water movement affects cell structure and function; a hypertonic solution causes cells to shrink, while a hypotonic solution leads to swelling.
    • Experiments like observing coffee diffusion in water help illustrate the effects of temperature on diffusion rates.

    Active Transport

    • Requires energy to move substances against their concentration gradient (from low to high concentration).
    • Key processes:
      • Endocytosis: Taking substances into the cell via vesicles.
      • Exocytosis: Expelling materials out of the cell.

    Differences Between Active and Passive Transport

    • Active transport requires energy; passive transport does not.
    • Active transport moves substances from low to high concentration; passive transport moves from high to low concentration.
    • Passive transport includes diffusion and osmosis, while active transport often involves a carrier protein or pump.

    Importance of Transport Mechanisms

    • Active transport is crucial for nutrient absorption in plant roots, allowing uptake of minerals even when concentrations are low.
    • Passive transport is important for maintaining homeostasis in cells and organisms.

    Practical Applications

    • Keeping lettuce damp retains moisture and prevents wilting due to osmosis.
    • Drinking sufficient water maintains cellular function and plasma osmotic balance.
    • Preservation of meats by salt soaking utilizes osmotic principles to inhibit bacterial growth.

    Assessment Techniques

    • Various activities such as matching terms in assessments help reinforce understanding of concepts like diffusion, osmosis, and transport methods.
    • Investigative activities, like observing dye dispersion in water at different temperatures, deepen comprehension of diffusion characteristics.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Q1-L3-Transport-of-Materials Biotechnology Grade 8 2020 PDF

    Description

    Test your knowledge on various cell biology processes, including phagocytosis and spinocytosis. This quiz encompasses key concepts and definitions that are crucial for understanding cellular functions. Perfect for students looking to reinforce their learning in cell biology.

    More Like This

    Active Transport and Cytosis Quiz
    16 questions

    Active Transport and Cytosis Quiz

    ProperPrehnite avatar
    ProperPrehnite
    Cell Biology: Globular-Shaped Cytosis
    31 questions

    Cell Biology: Globular-Shaped Cytosis

    ProperCerium avatar
    ProperCerium
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser