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When an electric signal is generated, it takes the form of a pulse that travels the length of the axon. The effective current of the signal is about 0.10 pA.What is the magnitude of the net electric potential (called the "action" potential) across the axon? 30 mV 70 mV 0 100 mV 130 mV The typical duration of a pulse is about 1 ms. About how many individual ions are transferred by the signal? Note: The individual charge of an electron is 1.6 x 10'19 C. 16,000 25,000 400,000 625,000,000 During the action potential, a sodium ion (Nat) moves from the outside to the inside of the neuron. How much electrical work was done to accomplish this? Note: 1 eV = 1.6 x 10-19 J O 0.030 eV O 0.070 eV O 0.10 eV O 1.6 eVAn axon is a cylind rically-shaped section of a nerve cell (neuron) that carries electrical signals in the brain. A typical axon has a length of 2.0 mm and a diameter of 40 pm. The outside of the axon is covered by a sheath of insulating material (\"myelin\") and the inside contains a uid that conducts electricity, the uid having a resistivity of about 60 Q'cm. When a signal is generated, the voltage inside the neuron changes from 70 mV (the \"resting\" potential) to + 30 mV and back again. What is the approximate electrical resistance of an axon? 0 1.0 M0 2.0 M0 3.0 M0 4.0 M0 The position of a particle moving along the maxis depends on the time according to the equation :17 : c152 b753, Where x is in meters, t in seconds, and c and b are positive constants. (a) What is the unit of constant c? (b) What is the unit of constant I)? Unit: m/s3 V (c) Find a formula of the velocity v in terms of c, b, and t. (d) Find a formula of the acceleration a in terms of c, b, and 15. (Be) At What time t 2 0 does the particle reach its maximum :1: value