When You Step on a Tack and Jump Back, Which

Question

When you step on a tack and jump back, which of the following is controlling the jump?
A) brain and spinal cord
B) spinal cord only
C) brain only
D) None of the above is involved in this response.

Accepted Answer

The spinal cord is responsible for reflex actions such as jumping back when you step on a tack. This is a rapid response that does not involve the brain in the initial reaction, allowing for a quicker response to potentially harmful stimuli.