DRAW IT The reflex that pulls your hand away when you prick your finger on a sharp object relies on a neuronal circuit with two synapses in the spinal cord. (a) Using a circle to represent a cross section of the spinal cord, draw the circuit. Label the types of neurons, the direction of information flow in each, and the locations of synapses.

Video transcript

Hello everyone. And in today's video we have a very short problem. So let's get into it. The withdrawal reflex pulls your hand away when you break your finger on a sharp object. All of the following statements or true regarding the withdrawal if reflects except to remember that we're looking for the exception to these withdrawal reflex or the incorrect statement between our answer choices. Now before we jump into the problem, I want you to recall from previous videos what the withdrawal reflex fundamentally is and it is nothing more than a spinal reflex that protects your body from damaging stimuli. And now that we know this, let us go over answer choices beginning by answer choice. C. It is a spinal reflex. Well from the beginning of or just definition we can see that this answer choice is correct and it's not going to be the exception to our question because the withdrawal reflects involved the spine. It is a spinal reflex. So moving on we have answer choice B. It is a policy synaptic reflex and actually answer choice. B. And A. Are very much related because a policy reflex is a reflex that involves inter neurons. It may involve one or more. And so these are actually both correct as we draw reflexes or policy skeptic. So we're going to cancel out both B. And A. And this all leaves us with answer choice D. It is controlled by the brain. And now I want you to just recall what reflexes. It is an unconscious response to a certain stimuli. So we don't really think about it when we do it. It is not controlled by the brain. And so this answer choice is going to be incorrect. It is the exception that we're looking for, and we're going to highlight it as the final answer. So, thank you very much for sticking around until the end of this video. I really hope this helped you.