Question

Which of the following is the electrical impulse that initiates a chain reaction resulting in contraction?

1) Action potential
2) Synaptic potential
3) Resting potential
4) Threshold potential

Answer 1

The electrical impulse that initiates a chain reaction resulting in contraction is the Action potential. An action potential is a sudden reversal of the electrical charge across the membrane of a resting neuron.

Step-by-step explanation:

The electrical impulse that initiates a chain reaction resulting in contraction is the Action potential. The electrical impulse that initiates a chain reaction resulting in contraction is the Action potential. An action potential is a sudden reversal of the electrical charge across the membrane of a resting neuron.

An action potential is a sudden reversal of the electrical charge across the membrane of a resting neuron. It occurs when the neuron receives a chemical signal from another cell, causing gates in sodium ion channels to open and allowing positive sodium ions to flow back into the cell. The resulting reversal of charge ripples down the axon as an electric current, leading to muscle contraction.