2022-05-15T14:27:18+03:00[Europe/Moscow] en true <p>what helps plants to enable the to coordinate the different parts of their bodies</p>, <p>what is a Venus flytrap</p>, <p>what does a Venus flytrap look like</p>, <p>describe the structure of the inside of the lobes of a Venus flytrap</p>, <p>what happens when one stiff sensory hair is touched with enough force </p>, <p>what do action potentials cause in the Venus flytrap</p>, <p>what kind of stimulation does it take for the action potential to be generated</p>, <p>how the closure of the trap is achieved (1)</p>, <p>how the closure of the trap is achieved (2)</p>, <p>what is receptor potential</p>, <p>how are receptor potentials produced</p>, <p>a large enough receptor potential can cause</p>, <p>what is the required stimulation to produce an action potential</p>, <p>how the closure of the trap is achieved (3)</p>, <p>what is the shape change of the flytrap lobes during a stimulus</p>, <p>how does the trap stay sealed</p>, <p>how does a Venus flytrap digest its prey</p>, <p>how long does the trap stay closed for and why </p> flashcards

A2 Electrical Communication in the Venus Flytrap

CIE Syllabus

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  • what helps plants to enable the to coordinate the different parts of their bodies

    communication systems

  • what is a Venus flytrap

    a carnivorous plant that gets its supply of nitrogen compounds by trapping and digesting small animals

  • what does a Venus flytrap look like

    a specialised leaf is divided into two lobes either side of a midrib

  • describe the structure of the inside of the lobes of a Venus flytrap

    it is red

    has nectar-secreting glands on the edges to attract insects

    has three stiff sensory hairs that respond to being touched

  • what happens when one stiff sensory hair is touched with enough force

    action potentials are stimulated which travel very fast across the leaf

  • what do action potentials cause in the Venus flytrap

    cause the two lobes to fold together along the midrib, capturing the insect

  • what kind of stimulation does it take for the action potential to be generated

    the stiffy sensory hairs being touched repeatedly within 30 seconds

  • how the closure of the trap is achieved (1)

    if one of the sensory hairs is touched with enough force, calcium ion channels in cells at the base of the hair are activated

  • how the closure of the trap is achieved (2)

    when these channels open, calcium ions flow in and generate a receptor potential

  • what is receptor potential

    an electrical response transduced from the energy of a stimulus detected by a sensory receptor cell

  • how are receptor potentials produced

    from the movement of positively charged ions into the cell through ion channels in the cell membrane

  • a large enough receptor potential can cause

    an action potential

  • what is the required stimulation to produce an action potential

    if two of the sensory hairs are stimulated or one hair twice within 30 seconds

  • how the closure of the trap is achieved (3)

    if two of the sensory hairs are stimulated or one hair twice within 30 seconds the an action potential is generated which travels across the trap and closes it

  • what is the shape change of the flytrap lobes during a stimulus

    convex to concave

  • how does the trap stay sealed

    requires ongoing activation of the sensory hairs provided by the prey which generates further action potentials

  • how does a Venus flytrap digest its prey

    further stimulation of the sensory hairs stimulate calcium ions to enter gland cells where they stimulate the exocytosis of vesicles containing digestive enzymes

  • how long does the trap stay closed for and why

    for up to a week to allow the prey to be digested and nutrients absorbed