The receptors that detect sound waves in the inner ear are located in the

1. macular
2. crista ampullaris
3. semi-circular canals
4. organ of Corti
5. none of the above

Which of the following will be required for an action potential to be fired in a neuron?

1. A graded potential reaches threshold
2. A threshold of at least -55mV is reached
3. Threshold is reached at the axon hilock

a) only 1 is correct

b) only 2 is correct

c) only 1, and 3 are correct

d) only 2, and 3 are correct

e) 1, 2, and 3 are correct