Identify the type of energy used in each action.

A. electrical energy

B. gravitational potential energy

C. mechanical energy

1. the flexing of an arm muscle

2. a signal transduction process by a neuron

3. a ball at the top of a hill

Electrical energy - The communication of neurons with each other takes place at synapses. Synapses are of two types i. e. chemical and electrical. A signal transduction process by a neuron uses electrical energy. In electrical synapse, flow of ions between cells takes place.

Gravitational potential energy - It is the energy possessed by an object when it is placed at some height. It is given by:

PE = mgh

The energy used when "a ball is at the top of a hill" is gravitational potential energy.

Mechanical energy - It is the total energy i. e. it is the combination of gravitational potential energy and kinetic energy.

The flexing of an arm muscle is an example of mechanical energy.

Identify the type of energy used in each action.

The following are the correct answers : -

A. electrical energy - 2. a signal transduction process by a neuron

B. gravitational potential energy - 3. a ball at the top of a hill

C. mechanical energy - 1. the flexing of an arm muscle