Other questions in this quiz

2. which statement concerning the role of Ca2+ in the contraction of skeletal muscle is correct?

  • Ca2+ ions do not play a role in the contractile process
  • a rise in intracellular Ca2+ allows actin to interact with myosin
  • the mitochondria acts as a store of Ca2+ for the contractile process
  • Ca2+ entry across the plasma membrane is important in sustaining the contraction of skeletal muscle
  • the tension of skeletal muscle fibres is partly regulated by G proteins

3. which statement concerning the AP is correct?

  • it may vary considerably in amplitude
  • it can generate in the absence of sodium ions
  • it can summate one with another
  • it results from a larger increase in the membrane permeability to sodium ions
  • it becomes larger as the stimulus strength increases

4. which of the following concerning NMJ is correct?

  • the motor nerve endings express muscarinic receptors
  • the motor nerve endings secrete noradrenaline
  • the motor nerve endings secrete acetylcholine
  • the motor nerve endings secrete adrenaline
  • the muscle membrane possesses muscarinic receptors

5. which statement about the CNS is correct?

  • it contains the dorsal root ganglia
  • it contains 31 pairs of spinal nerves
  • the white matter contains nerve cell bodies
  • the grey matter contains nerve cell bodies
  • it contains twelve pairs of cranial nerves

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