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Chapter 8 (Cellular Signals) Signalling Molecules Quiz

Quiz by Joshua McQuade

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7 questions
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  • Q1
    Q1 If a cell was triggered to self-destruct by a nearby cell this would be considered:
    Paralell Signalling
    Autocrine Signalling
    Endocrine Signalling
    Paracrine Signalling
    30s
  • Q2
    Q2 Which of the following would not be considered core to the Endocrine system
    A cellular receptor on a pancreatic cell
    The thyroid
    The ovaries
    The frontal lobe
    30s
  • Q3
    Q3 Anabolic steriods are a lipid based signalling molecule. Given this, suggest the most reasonable mode of signalling.
    The molecule diffuses through the membrane and binds directly the hormone-receptor complex within the cytosol
    The molecule binds to an extracellular receptor, triggering a cascade of caspases within the cell
    The molecule diffuses through the membrane, binding to a secondary messenger and enabling a hormone-receptor complex
    The molecule is endocytosed by the membrane, binding directly to the hormone-receptor complex.
    300s
  • Q4
    Q4 The only form of amino acid based molecules which are hydrophobic include:
    Peptide-based hormones
    Catecholamines
    Thyroid hormones
    Plant-based hormones
    300s
  • Q5
    Q5 Select the correct response relating to Plant Hormones and Animal hormones:
    Animal hormones are released through the blood stream, whereas plant hormones are released through the vascular tissue
    Both are produced in low quantities are they are potent.
    Animal hormones cannot be released into the air, whereas plant hormones can
    Both plant and animal hormones are made of biomacro molecules
    300s
  • Q6
    Q6 Rabbits are immune to the potent (and lethal!) effects of the funnel web spider poison, atraxotoxin, which is an inhibitor for post-synaptic neuron receptors. However, humans can die due to this poison. Select a valid reason for this:
    Human neuron receptors have a wide range of binding sites, whereas Rabbits do not.
    The receptors on the Humans post synaptic neuron are not specific, preventing binding.
    The receptors on Rabbits post-synaptic neuron are not specific to the poison, preventing binding.
    The Rabbits neurotransmitters are not destroyed by poison
    300s
  • Q7
    Fly spray contains chemicals which inhibits acetylcholinesterase, which has the function to degrade (digest) acetylcholine, a neurotransmitter which triggers muscle contraction. This kills fly by:
    Interrupting the signal transduction at the post-synaptic receptor.
    Breaking down protein channels in the synaptic gap membrane, preventing the passage of acetylcholine into the receiving cell.
    Causing the post-synaptic neuron to continue transmitting the impulse, resulting in the continued stimulation of the fly's muscles.
    Preventing acetylcholine from diffusing into the synaptic gap, thereby paralysing the fly
    300s

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