Ultimately, all scientific knowledge comes from:
Select one
O a. textbooks
O b. experimentation
<u>O c. experimentation & </u><u>observation</u><u> </u><u>✓</u><u>✓</u><u>✓</u>
O d. observation
Attaching bones isn't part of it
Answer:
1. Brain spinal cord 4. is ribs and nervs
Explanation:
I'm not sure if this question is talking about neurons, but if it is... depolarization in a neuron leads to an "action potential."