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Biology A2, F2144 module 1: communication & homeostasis

jamiemcparlin 13 preguntas

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Preguntas del test (13)

  1. 1The difference between negative and positive feedback is:
    1. AOne is always good for the body and one is always bad
    2. BNegative feedback uses neurones and positive uses hormones
    3. CNegative reverses a change away from optimum. Positive enhances it.
    4. DNegative feedback is part of the autonomic nervous system. Positive feedback is part of the somatic
  2. 2Tick the boxes of the ectotherm/s
    1. AImagen de la opción A
    2. BImagen de la opción B
    3. CImagen de la opción C
    4. DImagen de la opción D
  3. 3Which is the correct description of a motor neurone?
    1. ASmall cell body at receptor, long dendron but short axon with numerous dendrites. Myelinated.
    2. Blarge cell body at Central Nervous System, long dendron with dendrites going to effectors. Non myelinated
    3. Clarge cell body at receptor, long dendrite, short axon but no dendron . Myelinated.
    4. DLarge cell body at Central Nervous System and a long axon with dendrites. Myelinated.
  4. 4Which is the correct shape of graph for the generation and conduction of an action potential?
    1. AImagen de la opción A
    2. BImagen de la opción B
    3. CImagen de la opción C
    4. DImagen de la opción D
  5. 5In the conduction of an action potential, what happens after Na+ ion channels close ?
    1. Athe sodium/potassium pump begins pumping 2K+ into the cell and 2Na+ out.
    2. Bthe cell repolarises.
    3. CK+ ion channels open.
    4. DThe cell depolarises
  6. 6Local Currents are...
    1. AWhen ions diffuse into the cell and gather in a high conc. at the point at which they diffused in, causing them to diffuse to an area of low conc. further down the cell.
    2. BThe way in which an action potential appears to "jump" between the nodes of ranvier along a myelinated neurone.
    3. Cthe slow, smooth, linear flow of an action potential in a non-myelinated neurone due to the high concentrations of ions diffusing in through voltage gated channels and diffusing down the neurone.
    4. DWhere several action potentials join together to make one, larger one.
  7. 7What type of ion channels are present on the synaptic knob of a presynaptic neurone, that trigger the release of neurotransmitter?
    1. ASodium/potassium pump
    2. Bacetyl choline receptors
    3. Csodium ion channel
    4. Dcalcium ion channel
  8. 8What is the name of the neurotransmitter in a cholinergic synapse and the enzyme that breaks it down?
    1. ANor-adrenaline and Adrenelase
    2. Bcholine and cholinase
    3. Cacetyl choline and acetylcholinesterase
    4. Dacetate and acetatedecarboxylase
  9. 9What are the two types of hormones>
    1. AFirst messengers
    2. BPeptide
    3. CHexose
    4. DSteroid
  10. 10cAMP is a...
    1. Ahormone
    2. Bchemical
    3. Cenzyme
    4. Dsecond messenger

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Descripción
Test sobre Biology A2, F2144 module 1: communication & homeostasis, creado por jamiemcparlin el 15/01/2015.
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