Question

Imagine a person stepping on a pin and pulling his or her foot away. Look at the reflex arc of this scenario below.



Which statement best describes the image?

a)The sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor.

b)The motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector.

c)The sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector.

d)The sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.

Answer 1

Answer: The correct answer is -

c)The sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector.

Due to stepping on pin, the receptors (present on the target skin) become excited and transmit signals along a sensory neuron to the spinal cord, where they are carried to the interneuron and the appropriate response is carried back via motor neuron at the effectors.

As a consequence, the person immediately pulls the foot away.

Thus, option c) is the right answer.

Answer 2

Answer:

c)The sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector.

Explanation: