Answer:
Public Service Announcement (abbreviated PSA)
The p wave represents atrial contraction
Answer:
has plenty of grip suck as concrete
Explanation:
Answer:
They learned to salivate at the sound of a bell.
Explanation:
<em>He learned how to make his dog react this way, knowing that he would get food in return, due to the conditioned stimulus, which makes an individual react in a certain way, because that thing is associated to something else. It's like how we train dogs to "sit" and then we give them a treat to do so.</em>
