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PHY2011 - Neuroscience of communication, sensory and control systems - S1 2025
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Within an individual motor unit:
The force-velocity curve characterizes isometric contraction
s
Of how many motor units is this soleus muscle composed ?
Answer in whole numbers, with no decimal places.m) of a fibre which has a conduction velocity of 72 m/sec ?
Answer in whole numbers, with no decimal places.m has a conduction velocity of 117 m/sec. If its length from the spinal cord to the muscle it innervates is 1.3m, how long would it take an AP at the cell body (in the spinal cord) to reach the muscle ?
Answer in seconds to 3 decimal places.A myelinated nerve fibre has a conduction velocity of 118 m/sec and internode lengths of 0.8 mm. How long does it take an action potential to spread from one node of Ranvier to the next ? Answer in milliseconds to 3 decimal places.
A Beaker is divided into two chambers, A and B, by a semi-permeable membrane lying across the middle of the beaker.
Chamber A contains the following concentration of ions:
{Na+} = 58 mM,, {K+} = 129 mM, {Cl-} = 100 mM, {A-} = 106 mMChamber B contains the following concentration of ions:
{Na+} = 200 mM,, {K+} = 5 mM, {Cl-} = 50 mM, {A-} = 152 mMIf the membrane is permeable only to K
+, what is the transmembrane potential difference of Chamber A relative to Chamber B?
Answer in whole numbers, with no decimal places. In your answer give only the numerical (asbolute) value - i.e., ignore the sign of the answer.The formula weight of NaOH is 40.
Answer to 2 decimal places. Do not enter units in your answer.