Question

What enables animals to move rapidly in response to stimuli?

• A. Nerve cell or neuron
• B. Muscle cell
• C. A combination of both A and B
• D. Either A or B

Answer 1

Answer: (A), (B)

The correct options are
A Nerve cell or neuron
B Muscle cell

A stimulus is recieved by the neurons which then transmit it to the brain and spinal cord for processing. The resonse impluse is then carried back by motor neurons to the effector organ which in most cases are muscles. Once muscles recieve the impulse, they carry out the response.