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Plant Transportation/Conduction

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Terms in this set (20)

  • What is the function of xylem?

    Xylem moves water and minerals from roots to leaves.

  • What is the function of phloem?

    Phloem transports sugars from sources to sinks in plants.

  • What role do stomata play in plants?

    Stomata are pores that allow gas exchange and water vapor to escape from leaves.

  • How do guard cells function?

    Guard cells open and close stomata to control water loss.

  • What is cohesion in relation to water transport?

    Cohesion is the property of water molecules sticking to each other.

  • What is adhesion in relation to water transport?

    Adhesion is water sticking to other surfaces, aiding upward movement in plants.

  • What causes tension in the xylem during transpiration?

    Tension is created by transpiration pulling water upward through the xylem.

  • What is transpiration and how does it work?

    Transpiration is water evaporation from leaves through stomata, creating tension that pulls water up through xylem.

  • Which plant tissues and cells are involved in transpiration?

    Roots, xylem, mesophyll cells, stomata, and guard cells are involved in transpiration.

  • How are sugars, hormones, and proteins transported in plants?

    They are mainly transported through the phloem from sources to sinks.

  • What is translocation in plants?

    Translocation is the movement of sugars through phloem from sources to sinks.

  • Define source and sink in plant sugar transport.

    Source: where sugars enter phloem (usually leaves).
    Sink: where sugars are used or stored (roots, fruits).

  • Explain the Pressure-Flow Model of phloem transport.

    Sugar enters phloem at source, water enters by osmosis, pressure increases, pushing sap toward sink where sugar exits phloem.

  • What is osmosis?

    Osmosis is water movement across a selectively permeable membrane toward lower water potential.

  • What does water potential predict?

    Water potential predicts the direction water moves, from higher to lower water potential.

  • What is active transport in plants?

    Active transport moves substances using energy from low to high concentration, helping load sugars into phloem and absorb minerals.

  • What is passive transport?

    Passive transport moves substances down their concentration gradients without energy, e.g., diffusion and osmosis.

  • Summarize the key terms: Xylem, Phloem, Transpiration, Translocation.

    Xylem = water transport
    Phloem = sugar transport
    Transpiration = water loss
    Translocation = sugar movement

  • Summarize the key terms: Cohesion, Adhesion, Source, Sink.

    Cohesion = water sticks together
    Adhesion = water sticks to surfaces
    Source = sugar enters phloem
    Sink = sugar exits phloem

  • Summarize the key terms: Active transport vs Passive transport.

    Active transport = energy required
    Passive transport = no direct energy required