Lucy and her older brother Louis have developed quite a fierce sibling rivalry.On vacation in Mexico with their father,Louis and Lucy were being relatively well-behaved until one afternoon when Lucy accidentally stepped on her brother's foot and he automatically punched her.Louis apologized profusely saying that he just reacted and didn't even have time to think about what he did before he did it.Louis might try to claim that his brain was unaware of what he was doing at the time he punched Lucy because this type of response is considered a:

Question

Quizplus · Accepted Answer

Louis' automatic reaction to punch Lucy without thinking is an example of a spinal reflex. This means that the body reacts without input from the brain, as the signal travels directly from the sensory receptors in Lucy's foot to the spinal cord, triggering the muscle response to punch.

Lucy and Her Older Brother Louis Have Developed Quite a Fierce