Answer:
A dog attacked a cyclists while ridding down county road 5(CS)
On subsequent trips down the road(CS)
The cyclist's heart pumps extra fast(US).
He experience greater anxiety (UR)
Explanation:
Unconditioned Response(UR)- This is a response to a natural stimulus (Unconditioned Stimulus)
Unconditioned stimulus(US) refers to any stimulus that naturally and automatically triggers a specific response in humans or organisms.
Conditioned Stimulus(CS)- This is a learned substitute stimulus that have the same response as Unconditioned Stimulus.
Conditioned Response(CR) - This refers to as a response to learned stimulus and also to unconditioned stimulus.